AI Interactive Datasheet AT90CAN64
AVR · megaAVR

AT90CAN64 registers

All 137 registers by peripheral, at their data-space address (the I/O address IN and OUT use is shown beside it), with their reset value and every bit.

PORTA I/O Port

PINAPort A Input Pins

Address
0x20 I/O 0x00
Reset
0x00
Access
read/write
  1. 7PINA7
  2. 6PINA6
  3. 5PINA5
  4. 4PINA4
  5. 3PINA3
  6. 2PINA2
  7. 1PINA1
  8. 0PINA0

DDRAPort A Data Direction Register

Address
0x21 I/O 0x01
Reset
0x00
Access
read/write
  1. 7DDA7
  2. 6DDA6
  3. 5DDA5
  4. 4DDA4
  5. 3DDA3
  6. 2DDA2
  7. 1DDA1
  8. 0DDA0

PORTAPort A Data Register

Address
0x22 I/O 0x02
Reset
0x00
Access
read/write
  1. 7PORTA7
  2. 6PORTA6
  3. 5PORTA5
  4. 4PORTA4
  5. 3PORTA3
  6. 2PORTA2
  7. 1PORTA1
  8. 0PORTA0

PORTB I/O Port

PINBPort B Input Pins

Address
0x23 I/O 0x03
Reset
0x00
Access
read/write
  1. 7PINB7
  2. 6PINB6
  3. 5PINB5
  4. 4PINB4
  5. 3PINB3
  6. 2PINB2
  7. 1PINB1
  8. 0PINB0

DDRBPort B Data Direction Register

Address
0x24 I/O 0x04
Reset
0x00
Access
read/write
  1. 7DDB7
  2. 6DDB6
  3. 5DDB5
  4. 4DDB4
  5. 3DDB3
  6. 2DDB2
  7. 1DDB1
  8. 0DDB0

PORTBPort B Data Register

Address
0x25 I/O 0x05
Reset
0x00
Access
read/write
  1. 7PORTB7
  2. 6PORTB6
  3. 5PORTB5
  4. 4PORTB4
  5. 3PORTB3
  6. 2PORTB2
  7. 1PORTB1
  8. 0PORTB0

PORTC I/O Port

PINCPort C Input Pins

Address
0x26 I/O 0x06
Reset
0x00
Access
read/write
  1. 7PINC7
  2. 6PINC6
  3. 5PINC5
  4. 4PINC4
  5. 3PINC3
  6. 2PINC2
  7. 1PINC1
  8. 0PINC0

DDRCPort C Data Direction Register

Address
0x27 I/O 0x07
Reset
0x00
Access
read/write
  1. 7DDC7
  2. 6DDC6
  3. 5DDC5
  4. 4DDC4
  5. 3DDC3
  6. 2DDC2
  7. 1DDC1
  8. 0DDC0

PORTCPort C Data Register

Address
0x28 I/O 0x08
Reset
0x00
Access
read/write
  1. 7PORTC7
  2. 6PORTC6
  3. 5PORTC5
  4. 4PORTC4
  5. 3PORTC3
  6. 2PORTC2
  7. 1PORTC1
  8. 0PORTC0

PORTD I/O Port

PINDPort D Input Pins

Address
0x29 I/O 0x09
Reset
0x00
Access
read/write
  1. 7PIND7
  2. 6PIND6
  3. 5PIND5
  4. 4PIND4
  5. 3PIND3
  6. 2PIND2
  7. 1PIND1
  8. 0PIND0

DDRDPort D Data Direction Register

Address
0x2A I/O 0x0A
Reset
0x00
Access
read/write
  1. 7DDD7
  2. 6DDD6
  3. 5DDD5
  4. 4DDD4
  5. 3DDD3
  6. 2DDD2
  7. 1DDD1
  8. 0DDD0

PORTDPort D Data Register

Address
0x2B I/O 0x0B
Reset
0x00
Access
read/write
  1. 7PORTD7
  2. 6PORTD6
  3. 5PORTD5
  4. 4PORTD4
  5. 3PORTD3
  6. 2PORTD2
  7. 1PORTD1
  8. 0PORTD0

PORTE I/O Port

PINEInput Pins, Port E

Address
0x2C I/O 0x0C
Reset
0x00
Access
read/write
  1. 7PINE7
  2. 6PINE6
  3. 5PINE5
  4. 4PINE4
  5. 3PINE3
  6. 2PINE2
  7. 1PINE1
  8. 0PINE0

DDREData Direction Register, Port E

Address
0x2D I/O 0x0D
Reset
0x00
Access
read/write
  1. 7DDE7
  2. 6DDE6
  3. 5DDE5
  4. 4DDE4
  5. 3DDE3
  6. 2DDE2
  7. 1DDE1
  8. 0DDE0

PORTEData Register, Port E

Address
0x2E I/O 0x0E
Reset
0x00
Access
read/write
  1. 7PORTE7
  2. 6PORTE6
  3. 5PORTE5
  4. 4PORTE4
  5. 3PORTE3
  6. 2PORTE2
  7. 1PORTE1
  8. 0PORTE0

PORTF I/O Port

PINFInput Pins, Port F

Address
0x2F I/O 0x0F
Reset
0x00
Access
read/write
  1. 7PINF7
  2. 6PINF6
  3. 5PINF5
  4. 4PINF4
  5. 3PINF3
  6. 2PINF2
  7. 1PINF1
  8. 0PINF0

DDRFData Direction Register, Port F

Address
0x30 I/O 0x10
Reset
0x00
Access
read/write
  1. 7DDF7
  2. 6DDF6
  3. 5DDF5
  4. 4DDF4
  5. 3DDF3
  6. 2DDF2
  7. 1DDF1
  8. 0DDF0

PORTFData Register, Port F

Address
0x31 I/O 0x11
Reset
0x00
Access
read/write
  1. 7PORTF7
  2. 6PORTF6
  3. 5PORTF5
  4. 4PORTF4
  5. 3PORTF3
  6. 2PORTF2
  7. 1PORTF1
  8. 0PORTF0

PORTG I/O Port

PINGInput Pins, Port G

Address
0x32 I/O 0x12
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4PING4
  5. 3PING3
  6. 2PING2
  7. 1PING1
  8. 0PING0

DDRGData Direction Register, Port G

Address
0x33 I/O 0x13
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4DDG4
  5. 3DDG3
  6. 2DDG2
  7. 1DDG1
  8. 0DDG0

PORTGData Register, Port G

Address
0x34 I/O 0x14
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4PORTG4
  5. 3PORTG3
  6. 2PORTG2
  7. 1PORTG1
  8. 0PORTG0

TC0 Timer/Counter, 8-bit

TIFR0Timer/Counter0 Interrupt Flag register

Address
0x35 I/O 0x15
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1OCF0A
  8. 0TOV0
2 fields
FieldBitsWhat it does
OCF0A1Timer/Counter0 Output Compare Flag 0
TOV00Timer/Counter0 Overflow Flag

GTCCRGeneral Timer/Control Register

Address
0x43 I/O 0x23
Reset
0x00
Access
read/write
  1. 7TSM
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0PSR310
2 fields
FieldBitsWhat it does
TSM7Timer/Counter Synchronization Mode
PSR3100Prescaler Reset Timer/Counter1 and Timer/Counter0

TCCR0ATimer/Counter0 Control Register

Address
0x44 I/O 0x24
Reset
0x00
Access
read/write
  1. 7FOC0A
  2. 6WGM00
  3. 5COM0A1
  4. 4COM0A0
  5. 3WGM01
  6. 2CS02
  7. 1CS01
  8. 0CS00
5 fields
FieldBitsWhat it does
FOC0A7Force Output Compare
WGM006Waveform Generation Mode 0
  • 0 Normal
  • 1 CTC
  • 2 PWM, Phase Correct
  • 3 Fast PWM
COM0A5:4Compare Match Output Modes
WGM013Waveform Generation Mode 1
CS02:0Clock Selects
  • 0 No Clock Source (Stopped)
  • 1 Running, No Prescaling
  • 2 Running, CLK/8
  • 3 Running, CLK/64
  • 4 Running, CLK/256
  • 5 Running, CLK/1024
  • 6 Running, ExtClk Tn Falling Edge
  • 7 Running, ExtClk Tn Rising Edge

TCNT0Timer/Counter0

Address
0x46 I/O 0x26
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

OCR0ATimer/Counter0 Output Compare Register

Address
0x47 I/O 0x27
Reset
0x00
Access
read/write
  1. 7OCR0A7
  2. 6OCR0A6
  3. 5OCR0A5
  4. 4OCR0A4
  5. 3OCR0A3
  6. 2OCR0A2
  7. 1OCR0A1
  8. 0OCR0A0
1 field
FieldBitsWhat it does
OCR0A7:0Output Compare A bits

TIMSK0Timer/Counter0 Interrupt Mask Register

Address
0x6E
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1OCIE0A
  8. 0TOIE0
2 fields
FieldBitsWhat it does
OCIE0A1Timer/Counter0 Output Compare Match Interrupt Enable
TOIE00Timer/Counter0 Overflow Interrupt Enable

TC1 Timer/Counter, 16-bit

TIFR1Timer/Counter Interrupt Flag register

Address
0x36 I/O 0x16
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5ICF1
  4. 4–
  5. 3OCF1C
  6. 2OCF1B
  7. 1OCF1A
  8. 0TOV1
5 fields
FieldBitsWhat it does
ICF15Input Capture Flag 1
OCF1C3Output Compare Flag 1C
OCF1B2Output Compare Flag 1B
OCF1A1Output Compare Flag 1A
TOV10Timer/Counter1 Overflow Flag

TIMSK1Timer/Counter Interrupt Mask Register

Address
0x6F
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5ICIE1
  4. 4–
  5. 3OCIE1C
  6. 2OCIE1B
  7. 1OCIE1A
  8. 0TOIE1
5 fields
FieldBitsWhat it does
ICIE15Timer/Counter1 Input Capture Interrupt Enable
OCIE1C3Timer/Counter1 Output CompareC Match Interrupt Enable
OCIE1B2Timer/Counter1 Output CompareB Match Interrupt Enable
OCIE1A1Timer/Counter1 Output CompareA Match Interrupt Enable
TOIE10Timer/Counter1 Overflow Interrupt Enable

TCCR1ATimer/Counter1 Control Register A

Address
0x80
Reset
0x00
Access
read/write
  1. 7COM1A1
  2. 6COM1A0
  3. 5COM1B1
  4. 4COM1B0
  5. 3COM1C1
  6. 2COM1C0
  7. 1WGM11
  8. 0WGM10
4 fields
FieldBitsWhat it does
COM1A7:6Compare Output Mode 1A, bits
COM1B5:4Compare Output Mode 1B, bits
COM1C3:2Compare Output Mode 1C, bits
WGM11:0Waveform Generation Mode

TCCR1BTimer/Counter1 Control Register B

Address
0x81
Reset
0x00
Access
read/write
  1. 7ICNC1
  2. 6ICES1
  3. 5–
  4. 4WGM11
  5. 3WGM10
  6. 2CS12
  7. 1CS11
  8. 0CS10
4 fields
FieldBitsWhat it does
ICNC17Input Capture 1 Noise Canceler
ICES16Input Capture 1 Edge Select
WGM14:3Waveform Generation Mode
CS12:0Prescaler source of Timer/Counter 1
  • 0 No Clock Source (Stopped)
  • 1 Running, No Prescaling
  • 2 Running, CLK/8
  • 3 Running, CLK/64
  • 4 Running, CLK/256
  • 5 Running, CLK/1024
  • 6 Running, ExtClk Tn Falling Edge
  • 7 Running, ExtClk Tn Rising Edge

TCCR1CTimer/Counter 1 Control Register C

Address
0x82
Reset
0x00
Access
read/write
  1. 7FOC1A
  2. 6FOC1B
  3. 5FOC1C
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–
3 fields
FieldBitsWhat it does
FOC1A7Force Output Compare 1A
FOC1B6Force Output Compare 1B
FOC1C5Force Output Compare 1C

TCNT1Timer/Counter1 Bytes

Address
0x84
Reset
0x0000
Access
read/write
Size
16-bit

ICR1Timer/Counter1 Input Capture Register Bytes

Address
0x86
Reset
0x0000
Access
read/write
Size
16-bit

OCR1ATimer/Counter1 Output Compare Register Bytes

Address
0x88
Reset
0x0000
Access
read/write
Size
16-bit

OCR1BTimer/Counter1 Output Compare Register Bytes

Address
0x8A
Reset
0x0000
Access
read/write
Size
16-bit

OCR1CTimer/Counter1 Output Compare Register Bytes

Address
0x8C
Reset
0x0000
Access
read/write
Size
16-bit

TC2 Timer/Counter, 8-bit Async

TIFR2Timer/Counter Interrupt Flag Register

Address
0x37 I/O 0x17
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1OCF2A
  8. 0TOV2
2 fields
FieldBitsWhat it does
OCF2A1Output Compare Flag 2
TOV20Timer/Counter2 Overflow Flag

GTCCRGeneral Timer/Counter Control Register

Address
0x43 I/O 0x23
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1PSR2
  8. 0–
1 field
FieldBitsWhat it does
PSR21Prescaler Reset Timer/Counter2

TIMSK2Timer/Counter Interrupt Mask register

Address
0x70
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1OCIE2A
  8. 0TOIE2
2 fields
FieldBitsWhat it does
OCIE2A1Timer/Counter2 Output Compare Match Interrupt Enable
TOIE20Timer/Counter2 Overflow Interrupt Enable

TCCR2ATimer/Counter2 Control Register

Address
0xB0
Reset
0x00
Access
read/write
  1. 7FOC2A
  2. 6WGM20
  3. 5COM2A1
  4. 4COM2A0
  5. 3WGM21
  6. 2CS22
  7. 1CS21
  8. 0CS20
5 fields
FieldBitsWhat it does
FOC2A7Force Output Compare
WGM206Waveform Generation Mode
  • 0 Normal
  • 1 CTC
  • 2 PWM, Phase Correct
  • 3 Fast PWM
COM2A5:4Compare Output Mode bits
WGM213Waveform Generation Mode
CS22:0Clock Select bits
  • 0 No Clock Source (Stopped)
  • 1 Running, No Prescaling
  • 2 Running, CLK/8
  • 3 Running, CLK/32
  • 4 Running, CLK/64
  • 5 Running, CLK/128
  • 6 Running, CLK/256
  • 7 Running, CLK/1024

TCNT2Timer/Counter2

Address
0xB2
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

OCR2ATimer/Counter2 Output Compare Register

Address
0xB3
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

ASSRAsynchronous Status Register

Address
0xB6
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4EXCLK
  5. 3AS2
  6. 2TCN2UB
  7. 1OCR2UB
  8. 0TCR2UB
5 fields
FieldBitsWhat it does
EXCLK4Enable External Clock Interrupt
AS23AS2: Asynchronous Timer/Counter2
TCN2UB2TCN2UB: Timer/Counter2 Update Busy
OCR2UB1Output Compare Register2 Update Busy
TCR2UB0TCR2UB: Timer/Counter Control Register2 Update Busy

TC3 Timer/Counter, 16-bit

TIFR3Timer/Counter Interrupt Flag register

Address
0x38 I/O 0x18
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5ICF3
  4. 4–
  5. 3OCF3C
  6. 2OCF3B
  7. 1OCF3A
  8. 0TOV3
5 fields
FieldBitsWhat it does
ICF35Input Capture Flag 3
OCF3C3Output Compare Flag 3C
OCF3B2Output Compare Flag 3B
OCF3A1Output Compare Flag 3A
TOV30Timer/Counter3 Overflow Flag

TIMSK3Timer/Counter Interrupt Mask Register

Address
0x71
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5ICIE3
  4. 4–
  5. 3OCIE3C
  6. 2OCIE3B
  7. 1OCIE3A
  8. 0TOIE3
5 fields
FieldBitsWhat it does
ICIE35Timer/Counter3 Input Capture Interrupt Enable
OCIE3C3Timer/Counter3 Output CompareC Match Interrupt Enable
OCIE3B2Timer/Counter3 Output CompareB Match Interrupt Enable
OCIE3A1Timer/Counter3 Output CompareA Match Interrupt Enable
TOIE30Timer/Counter3 Overflow Interrupt Enable

TCCR3ATimer/Counter3 Control Register A

Address
0x90
Reset
0x00
Access
read/write
  1. 7COM3A1
  2. 6COM3A0
  3. 5COM3B1
  4. 4COM3B0
  5. 3COM3C1
  6. 2COM3C0
  7. 1WGM31
  8. 0WGM30
4 fields
FieldBitsWhat it does
COM3A7:6Compare Output Mode 3A, bits
COM3B5:4Compare Output Mode 3B, bits
COM3C3:2Compare Output Mode 3C, bits
WGM31:0Waveform Generation Mode

TCCR3BTimer/Counter3 Control Register B

Address
0x91
Reset
0x00
Access
read/write
  1. 7ICNC3
  2. 6ICES3
  3. 5–
  4. 4WGM31
  5. 3WGM30
  6. 2CS32
  7. 1CS31
  8. 0CS30
4 fields
FieldBitsWhat it does
ICNC37Input Capture 3 Noise Canceler
ICES36Input Capture 3 Edge Select
WGM34:3Waveform Generation Mode
CS32:0Prescaler source of Timer/Counter 3
  • 0 No Clock Source (Stopped)
  • 1 Running, No Prescaling
  • 2 Running, CLK/8
  • 3 Running, CLK/64
  • 4 Running, CLK/256
  • 5 Running, CLK/1024
  • 6 Running, ExtClk Tn Falling Edge
  • 7 Running, ExtClk Tn Rising Edge

TCCR3CTimer/Counter 3 Control Register C

Address
0x92
Reset
0x00
Access
read/write
  1. 7FOC3A
  2. 6FOC3B
  3. 5FOC3C
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–
3 fields
FieldBitsWhat it does
FOC3A7Force Output Compare 3A
FOC3B6Force Output Compare 3B
FOC3C5Force Output Compare 3C

TCNT3Timer/Counter3 Bytes

Address
0x94
Reset
0x0000
Access
read/write
Size
16-bit

ICR3Timer/Counter3 Input Capture Register Bytes

Address
0x96
Reset
0x0000
Access
read/write
Size
16-bit

OCR3ATimer/Counter3 Output Compare Register Bytes

Address
0x98
Reset
0x0000
Access
read/write
Size
16-bit

OCR3BTimer/Counter3 Output Compare Register Bytes

Address
0x9A
Reset
0x0000
Access
read/write
Size
16-bit

OCR3CTimer/Counter3 Output Compare Register Bytes

Address
0x9C
Reset
0x0000
Access
read/write
Size
16-bit

EXINT External Interrupts

EIFRExternal Interrupt Flag Register

Address
0x3C I/O 0x1C
Reset
0x00
Access
read/write
  1. 7INTF7
  2. 6INTF6
  3. 5INTF5
  4. 4INTF4
  5. 3INTF3
  6. 2INTF2
  7. 1INTF1
  8. 0INTF0
1 field
FieldBitsWhat it does
INTF7:0External Interrupt Flags

EIMSKExternal Interrupt Mask Register

Address
0x3D I/O 0x1D
Reset
0x00
Access
read/write
  1. 7INT7
  2. 6INT6
  3. 5INT5
  4. 4INT4
  5. 3INT3
  6. 2INT2
  7. 1INT1
  8. 0INT0
1 field
FieldBitsWhat it does
INT7:0External Interrupt Request 7 Enable

EICRAExternal Interrupt Control Register A

Address
0x69
Reset
0x00
Access
read/write
  1. 7ISC31
  2. 6ISC30
  3. 5ISC21
  4. 4ISC20
  5. 3ISC11
  6. 2ISC10
  7. 1ISC01
  8. 0ISC00
4 fields
FieldBitsWhat it does
ISC37:6External Interrupt Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX
ISC25:4External Interrupt Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX
ISC13:2External Interrupt Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX
ISC01:0External Interrupt Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX

EICRBExternal Interrupt Control Register B

Address
0x6A
Reset
0x00
Access
read/write
  1. 7ISC71
  2. 6ISC70
  3. 5ISC61
  4. 4ISC60
  5. 3ISC51
  6. 2ISC50
  7. 1ISC41
  8. 0ISC40
4 fields
FieldBitsWhat it does
ISC77:6External Interrupt 7-4 Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX
ISC65:4External Interrupt 7-4 Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX
ISC53:2External Interrupt 7-4 Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX
ISC41:0External Interrupt 7-4 Sense Control Bit
  • 0 Low Level of INTX
  • 1 Any Logical Change of INTX
  • 2 Falling Edge of INTX
  • 3 Rising Edge of INTX

CPU CPU Registers

GPIOR0General Purpose IO Register 0

Address
0x3E I/O 0x1E
Reset
0x00
Access
read/write
  1. 7GPIOR07
  2. 6GPIOR06
  3. 5GPIOR05
  4. 4GPIOR04
  5. 3GPIOR03
  6. 2GPIOR02
  7. 1GPIOR01
  8. 0GPIOR00
8 fields
FieldBitsWhat it does
GPIOR077General Purpose IO Register 0 bit 7
GPIOR066General Purpose IO Register 0 bit 6
GPIOR055General Purpose IO Register 0 bit 5
GPIOR044General Purpose IO Register 0 bit 4
GPIOR033General Purpose IO Register 0 bit 3
GPIOR022General Purpose IO Register 0 bit 2
GPIOR011General Purpose IO Register 0 bit 1
GPIOR000General Purpose IO Register 0 bit 0

GPIOR1General Purpose IO Register 1

Address
0x4A I/O 0x2A
Reset
0x00
Access
read/write
  1. 7GPIOR7
  2. 6GPIOR6
  3. 5GPIOR5
  4. 4GPIOR4
  5. 3GPIOR3
  6. 2GPIOR2
  7. 1GPIOR1
  8. 0GPIOR0
1 field
FieldBitsWhat it does
GPIOR7:0General Purpose IO Register 1 bis

GPIOR2General Purpose IO Register 2

Address
0x4B I/O 0x2B
Reset
0x00
Access
read/write
  1. 7GPIOR7
  2. 6GPIOR6
  3. 5GPIOR5
  4. 4GPIOR4
  5. 3GPIOR3
  6. 2GPIOR2
  7. 1GPIOR1
  8. 0GPIOR0
1 field
FieldBitsWhat it does
GPIOR7:0General Purpose IO Register 2 bis

SMCRSleep Mode Control Register

Address
0x53 I/O 0x33
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3SM2
  6. 2SM1
  7. 1SM0
  8. 0SE
2 fields
FieldBitsWhat it does
SM3:1Sleep Mode Select bits
  • 0 Idle
  • 1 ADC Noise Reduction (If Available)
  • 2 Power Down
  • 3 Power Save
  • 4 Reserved
  • 5 Reserved
  • 6 Standby
  • 7 Reserved
SE0Sleep Enable

MCUSRMCU Status Register

Address
0x54 I/O 0x34
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4JTRF
  5. 3WDRF
  6. 2BORF
  7. 1EXTRF
  8. 0PORF
5 fields
FieldBitsWhat it does
JTRF4JTAG Reset Flag
WDRF3Watchdog Reset Flag
BORF2Brown-out Reset Flag
EXTRF1External Reset Flag
PORF0Power-on reset flag

MCUCRMCU Control Register

Address
0x55 I/O 0x35
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4PUD
  5. 3–
  6. 2–
  7. 1IVSEL
  8. 0IVCE
3 fields
FieldBitsWhat it does
PUD4Pull-up disable
IVSEL1Interrupt Vector Select
IVCE0Interrupt Vector Change Enable

RAMPZRAM Page Z Select Register - Not used.

Address
0x5B I/O 0x3B
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0RAMPZ0
1 field
FieldBitsWhat it does
RAMPZ00RAM Page Z Select Register Bit 0

SPStack Pointer

Address
0x5D I/O 0x3D
Reset
0x10FF
Access
read/write
Size
16-bit

SREGStatus Register

Address
0x5F I/O 0x3F
Reset
0x00
Access
read/write
  1. 7I
  2. 6T
  3. 5H
  4. 4S
  5. 3V
  6. 2N
  7. 1Z
  8. 0C
8 fields
FieldBitsWhat it does
I7Global Interrupt Enable
T6Bit Copy Storage
H5Half Carry Flag
S4Sign Bit
V3Two's Complement Overflow Flag
N2Negative Flag
Z1Zero Flag
C0Carry Flag

CLKPRClock Prescale Register

Address
0x61
Reset
0x00
Access
read/write
  1. 7CLKPCE
  2. 6–
  3. 5–
  4. 4–
  5. 3CLKPS3
  6. 2CLKPS2
  7. 1CLKPS1
  8. 0CLKPS0
2 fields
FieldBitsWhat it does
CLKPCE7
CLKPS3:0
  • 0 1
  • 1 2
  • 2 4
  • 3 8
  • 4 16
  • 5 32
  • 6 64
  • 7 128
  • 8 256

OSCCALOscillator Calibration Value

Address
0x66
Reset
0x00
Access
read/write
  1. 7OSCCAL7
  2. 6OSCCAL6
  3. 5OSCCAL5
  4. 4OSCCAL4
  5. 3OSCCAL3
  6. 2OSCCAL2
  7. 1OSCCAL1
  8. 0OSCCAL0
1 field
FieldBitsWhat it does
OSCCAL7:0Oscillator Calibration

XMCRAExternal Memory Control Register A

Address
0x74
Reset
0x00
Access
read/write
  1. 7SRE
  2. 6SRL2
  3. 5SRL1
  4. 4SRL0
  5. 3SRW11
  6. 2SRW10
  7. 1SRW01
  8. 0SRW00
4 fields
FieldBitsWhat it does
SRE7External SRAM Enable
SRL6:4Wait state page limit
  • 0 LS = N/A, US = 0x1100 - 0xFFFF
  • 1 LS = XMEMSTART - 0x1FFF, US = 0x2000 - 0xFFFF
  • 2 LS = XMEMSTART - 0x3FFF, US = 0x4000 - 0xFFFF
  • 3 LS = XMEMSTART - 0x5FFF, US = 0x6000 - 0xFFFF
  • 4 LS = XMEMSTART - 0x7FFF, US = 0x8000 - 0xFFFF
  • 5 LS = XMEMSTART - 0x9FFF, US = 0xA000 - 0xFFFF
  • 6 LS = XMEMSTART - 0xBFFF, US = 0xC000 - 0xFFFF
  • 7 LS = XMEMSTART - 0xDFFF, US = 0xE000 - 0xFFFF
SRW13:2Wait state select bit upper page
  • 0 No wait-states
  • 1 Wait one cycle during read/write strobe
  • 2 Wait two cycles during read/write strobe
  • 3 Wait two cycles during read/write and wait one cycle before driving out new address
SRW01:0Wait state select bit lower page
  • 0 No wait-states
  • 1 Wait one cycle during read/write strobe
  • 2 Wait two cycles during read/write strobe
  • 3 Wait two cycles during read/write and wait one cycle before driving out new address

XMCRBExternal Memory Control Register B

Address
0x75
Reset
0x00
Access
read/write
  1. 7XMBK
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2XMM2
  7. 1XMM1
  8. 0XMM0
2 fields
FieldBitsWhat it does
XMBK7External Memory Bus Keeper Enable
XMM2:0External Memory High Mask

EEPROM EEPROM

EECREEPROM Control Register

Address
0x3F I/O 0x1F
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3EERIE
  6. 2EEMWE
  7. 1EEWE
  8. 0EERE
4 fields
FieldBitsWhat it does
EERIE3EEPROM Ready Interrupt Enable
EEMWE2EEPROM Master Write Enable
EEWE1EEPROM Write Enable
EERE0EEPROM Read Enable

EEDREEPROM Data Register

Address
0x40 I/O 0x20
Reset
0x00
Access
read/write
  1. 7EEDR7
  2. 6EEDR6
  3. 5EEDR5
  4. 4EEDR4
  5. 3EEDR3
  6. 2EEDR2
  7. 1EEDR1
  8. 0EEDR0
1 field
FieldBitsWhat it does
EEDR7:0EEPROM Data bits

EEAREEPROM Read/Write Access Bytes - Only bit 10..8 are used in AT90CAN64 - Only bit 9..8 are used in AT90CAN32

Address
0x41 I/O 0x21
Reset
0x0000
Access
read/write
Size
16-bit
1 field
FieldBitsWhat it does
EEAR11:0EEPROM Address bits

SPI Serial Peripheral Interface

SPCRSPI Control Register

Address
0x4C I/O 0x2C
Reset
0x00
Access
read/write
  1. 7SPIE
  2. 6SPE
  3. 5DORD
  4. 4MSTR
  5. 3CPOL
  6. 2CPHA
  7. 1SPR1
  8. 0SPR0
7 fields
FieldBitsWhat it does
SPIE7SPI Interrupt Enable
SPE6SPI Enable
DORD5Data Order
MSTR4Master/Slave Select
CPOL3Clock polarity
CPHA2Clock Phase
SPR1:0SPI Clock Rate Selects
  • 0 fosc/4
  • 1 fosc/16
  • 2 fosc/64
  • 3 fosc/128
  • 4 fosc/2
  • 5 fosc/8
  • 6 fosc/32
  • 7 fosc/64

SPSRSPI Status Register

Address
0x4D I/O 0x2D
Reset
0x00
Access
read/write
  1. 7SPIF
  2. 6WCOL
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0SPI2X
3 fields
FieldBitsWhat it does
SPIF7SPI Interrupt Flag
WCOL6Write Collision Flag
SPI2X0Double SPI Speed Bit

SPDRSPI Data Register

Address
0x4E I/O 0x2E
Reset
0x00
Access
read/write
  1. 7SPD7
  2. 6SPD6
  3. 5SPD5
  4. 4SPD4
  5. 3SPD3
  6. 2SPD2
  7. 1SPD1
  8. 0SPD0
1 field
FieldBitsWhat it does
SPD7:0SPI Data Register

AC Analog Comparator

ACSRAnalog Comparator Control And Status Register

Address
0x50 I/O 0x30
Reset
0x00
Access
read/write
  1. 7ACD
  2. 6ACBG
  3. 5ACO
  4. 4ACI
  5. 3ACIE
  6. 2ACIC
  7. 1ACIS1
  8. 0ACIS0
7 fields
FieldBitsWhat it does
ACD7Analog Comparator Disable
ACBG6Analog Comparator Bandgap Select
ACO5Analog Compare Output
ACI4Analog Comparator Interrupt Flag
ACIE3Analog Comparator Interrupt Enable
ACIC2Analog Comparator Input Capture Enable
ACIS1:0Analog Comparator Interrupt Mode Select bits
  • 0 Interrupt on Toggle
  • 1 Reserved
  • 2 Interrupt on Falling Edge
  • 3 Interrupt on Rising Edge

ADCSRBADC Control and Status Register B

Address
0x7B
Reset
0x00
Access
read/write
  1. 7–
  2. 6ACME
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–
1 field
FieldBitsWhat it does
ACME6Analog Comparator Multiplexer Enable

DIDR1

Address
0x7F
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1AIN1D
  8. 0AIN0D
2 fields
FieldBitsWhat it does
AIN1D1AIN1 Digital Input Disable
AIN0D0AIN0 Digital Input Disable

JTAG JTAG Interface

OCDROn-Chip Debug Related Register in I/O Memory

Address
0x51 I/O 0x31
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

MCUSRMCU Status Register

Address
0x54 I/O 0x34
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4JTRF
  5. 3–
  6. 2–
  7. 1–
  8. 0–
1 field
FieldBitsWhat it does
JTRF4JTAG Reset Flag

MCUCRMCU Control Register

Address
0x55 I/O 0x35
Reset
0x00
Access
read/write
  1. 7JTD
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–
1 field
FieldBitsWhat it does
JTD7JTAG Interface Disable

BOOT_LOAD Bootloader

SPMCSRStore Program Memory Control Register

Address
0x57 I/O 0x37
Reset
0x00
Access
read/write
  1. 7SPMIE
  2. 6RWWSB
  3. 5–
  4. 4RWWSRE
  5. 3BLBSET
  6. 2PGWRT
  7. 1PGERS
  8. 0SPMEN
7 fields
FieldBitsWhat it does
SPMIE7SPM Interrupt Enable
RWWSB6Read While Write Section Busy
RWWSRE4Read While Write section read enable
BLBSET3Boot Lock Bit Set
PGWRT2Page Write
PGERS1Page Erase
SPMEN0Store Program Memory Enable

WDT Watchdog Timer

WDTCRWatchdog Timer Control Register

Address
0x60
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4WDCE
  5. 3WDE
  6. 2WDP2
  7. 1WDP1
  8. 0WDP0
3 fields
FieldBitsWhat it does
WDCE4Watchdog Change Enable
WDE3Watch Dog Enable
WDP2:0Watch Dog Timer Prescaler bits
  • 0 Oscillator Cycles 16K
  • 1 Oscillator Cycles 32K
  • 2 Oscillator Cycles 64K
  • 3 Oscillator Cycles 128K
  • 4 Oscillator Cycles 256K
  • 5 Oscillator Cycles 512K
  • 6 Oscillator Cycles 1024K
  • 7 Oscillator Cycles 2048K

ADC Analog-to-Digital Converter

ADCADC Data Register Bytes

Address
0x78
Reset
0x0000
Access
read/write
Size
16-bit

ADCSRAThe ADC Control and Status register

Address
0x7A
Reset
0x00
Access
read/write
  1. 7ADEN
  2. 6ADSC
  3. 5ADATE
  4. 4ADIF
  5. 3ADIE
  6. 2ADPS2
  7. 1ADPS1
  8. 0ADPS0
6 fields
FieldBitsWhat it does
ADEN7ADC Enable
ADSC6ADC Start Conversion
ADATE5ADC Auto Trigger Enable
ADIF4ADC Interrupt Flag
ADIE3ADC Interrupt Enable
ADPS2:0ADC Prescaler Select Bits
  • 0 2
  • 1 2
  • 2 4
  • 3 8
  • 4 16
  • 5 32
  • 6 64
  • 7 128

ADCSRBADC Control and Status Register B

Address
0x7B
Reset
0x00
Access
read/write
  1. 7ADHSM
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2ADTS2
  7. 1ADTS1
  8. 0ADTS0
2 fields
FieldBitsWhat it does
ADHSM7ADC High Speed Mode
ADTS2:0ADC Auto Trigger Sources
  • 0 Free Running mode
  • 1 Analog Comparator
  • 2 External Interrupt Request 0
  • 3 Timer/Counter0 Compare Match A
  • 4 Timer/Counter0 Overflow
  • 5 Timer/Counter1 Compare Match B
  • 6 Timer/Counter1 Overflow
  • 7 Timer/Counter1 Capture Event

ADMUXThe ADC multiplexer Selection Register

Address
0x7C
Reset
0x00
Access
read/write
  1. 7REFS1
  2. 6REFS0
  3. 5ADLAR
  4. 4MUX4
  5. 3MUX3
  6. 2MUX2
  7. 1MUX1
  8. 0MUX0
3 fields
FieldBitsWhat it does
REFS7:6Reference Selection Bits
  • 0 AREF, Internal Vref turned off
  • 1 AVCC with external capacitor at AREF pin
  • 2 Reserved
  • 3 Internal 2.56V Voltage Reference with external capacitor at AREF pin
ADLAR5Left Adjust Result
MUX4:0Analog Channel and Gain Selection Bits

DIDR0Digital Input Disable Register 1

Address
0x7E
Reset
0x00
Access
read/write
  1. 7ADC7D
  2. 6ADC6D
  3. 5ADC5D
  4. 4ADC4D
  5. 3ADC3D
  6. 2ADC2D
  7. 1ADC1D
  8. 0ADC0D
8 fields
FieldBitsWhat it does
ADC7D7ADC7 Digital input Disable
ADC6D6ADC6 Digital input Disable
ADC5D5ADC5 Digital input Disable
ADC4D4ADC4 Digital input Disable
ADC3D3ADC3 Digital input Disable
ADC2D2ADC2 Digital input Disable
ADC1D1ADC1 Digital input Disable
ADC0D0ADC0 Digital input Disable

TWI Two Wire Serial Interface

TWBRTWI Bit Rate register

Address
0xB8
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

TWSRTWI Status Register

Address
0xB9
Reset
0x00
Access
read/write
  1. 7TWS4
  2. 6TWS3
  3. 5TWS2
  4. 4TWS1
  5. 3TWS0
  6. 2–
  7. 1TWPS1
  8. 0TWPS0
2 fields
FieldBitsWhat it does
TWS7:3TWI Status
TWPS1:0TWI Prescaler
  • 0 1
  • 1 4
  • 2 16
  • 3 64

TWARTWI (Slave) Address register

Address
0xBA
Reset
0x00
Access
read/write
  1. 7TWA6
  2. 6TWA5
  3. 5TWA4
  4. 4TWA3
  5. 3TWA2
  6. 2TWA1
  7. 1TWA0
  8. 0TWGCE
2 fields
FieldBitsWhat it does
TWA7:1TWI (Slave) Address register Bits
TWGCE0TWI General Call Recognition Enable Bit

TWDRTWI Data register

Address
0xBB
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

TWCRTWI Control Register

Address
0xBC
Reset
0x00
Access
read/write
  1. 7TWINT
  2. 6TWEA
  3. 5TWSTA
  4. 4TWSTO
  5. 3TWWC
  6. 2TWEN
  7. 1–
  8. 0TWIE
7 fields
FieldBitsWhat it does
TWINT7TWI Interrupt Flag
TWEA6TWI Enable Acknowledge Bit
TWSTA5TWI Start Condition Bit
TWSTO4TWI Stop Condition Bit
TWWC3TWI Write Collision Flag
TWEN2TWI Enable Bit
TWIE0TWI Interrupt Enable

USART0 USART

UCSR0AUSART Control and Status Register A

Address
0xC0
Reset
0x00
Access
read/write
  1. 7RXC0
  2. 6TXC0
  3. 5UDRE0
  4. 4FE0
  5. 3DOR0
  6. 2UPE0
  7. 1U2X0
  8. 0MPCM0
8 fields
FieldBitsWhat it does
RXC07USART Receive Complete
TXC06USART Transmit Complete
UDRE05USART Data Register Empty
FE04Framing Error
DOR03Data overRun
UPE02Parity Error
U2X01Double the USART transmission speed
MPCM00Multi-processor Communication Mode

UCSR0BUSART Control and Status Register B

Address
0xC1
Reset
0x00
Access
read/write
  1. 7RXCIE0
  2. 6TXCIE0
  3. 5UDRIE0
  4. 4RXEN0
  5. 3TXEN0
  6. 2UCSZ02
  7. 1RXB80
  8. 0TXB80
8 fields
FieldBitsWhat it does
RXCIE07RX Complete Interrupt Enable
TXCIE06TX Complete Interrupt Enable
UDRIE05USART Data register Empty Interrupt Enable
RXEN04Receiver Enable
TXEN03Transmitter Enable
UCSZ022Character Size
RXB801Receive Data Bit 8
TXB800Transmit Data Bit 8

UCSR0CUSART Control and Status Register C

Address
0xC2
Reset
0x00
Access
read/write
  1. 7–
  2. 6UMSEL0
  3. 5UPM01
  4. 4UPM00
  5. 3USBS0
  6. 2UCSZ01
  7. 1UCSZ00
  8. 0UCPOL0
5 fields
FieldBitsWhat it does
UMSEL06USART Mode Select
  • 0 Asynchronous Operation
  • 1 Synchronous Operation
UPM05:4Parity Mode Bits
  • 0 Disabled
  • 1 Reserved
  • 2 Enabled, Even Parity
  • 3 Enabled, Odd Parity
USBS03Stop Bit Select
  • 0 1-bit
  • 1 2-bit
UCSZ02:1Character Size
UCPOL00Clock Polarity

UBRR0USART Baud Rate Register t Bytes

Address
0xC4
Reset
0x0000
Access
read/write
Size
16-bit

UDR0USART I/O Data Register

Address
0xC6
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

USART1 USART

UCSR1AUSART Control and Status Register A

Address
0xC8
Reset
0x00
Access
read/write
  1. 7RXC1
  2. 6TXC1
  3. 5UDRE1
  4. 4FE1
  5. 3DOR1
  6. 2UPE1
  7. 1U2X1
  8. 0MPCM1
8 fields
FieldBitsWhat it does
RXC17USART Receive Complete
TXC16USART Transmit Complete
UDRE15USART Data Register Empty
FE14Framing Error
DOR13Data overRun
UPE12Parity Error
U2X11Double the USART transmission speed
MPCM10Multi-processor Communication Mode

UCSR1BUSART Control and Status Register B

Address
0xC9
Reset
0x00
Access
read/write
  1. 7RXCIE1
  2. 6TXCIE1
  3. 5UDRIE1
  4. 4RXEN1
  5. 3TXEN1
  6. 2UCSZ12
  7. 1RXB81
  8. 0TXB81
8 fields
FieldBitsWhat it does
RXCIE17RX Complete Interrupt Enable
TXCIE16TX Complete Interrupt Enable
UDRIE15USART Data register Empty Interrupt Enable
RXEN14Receiver Enable
TXEN13Transmitter Enable
UCSZ122Character Size
RXB811Receive Data Bit 8
TXB810Transmit Data Bit 8

UCSR1CUSART Control and Status Register C

Address
0xCA
Reset
0x00
Access
read/write
  1. 7–
  2. 6UMSEL1
  3. 5UPM11
  4. 4UPM10
  5. 3USBS1
  6. 2UCSZ11
  7. 1UCSZ10
  8. 0UCPOL1
5 fields
FieldBitsWhat it does
UMSEL16USART Mode Select
  • 0 Asynchronous Operation
  • 1 Synchronous Operation
UPM15:4Parity Mode Bits
  • 0 Disabled
  • 1 Reserved
  • 2 Enabled, Even Parity
  • 3 Enabled, Odd Parity
USBS13Stop Bit Select
  • 0 1-bit
  • 1 2-bit
UCSZ12:1Character Size
UCPOL10Clock Polarity

UBRR1USART Baud Rate Register t Bytes

Address
0xCC
Reset
0x0000
Access
read/write
Size
16-bit

UDR1USART I/O Data Register

Address
0xCE
Reset
0x00
Access
read/write
  1. 7–
  2. 6–
  3. 5–
  4. 4–
  5. 3–
  6. 2–
  7. 1–
  8. 0–

CAN Controller Area Network

CANGCONCAN General Control Register

Address
0xD8
Reset
0x00
Access
read/write
  1. 7ABRQ
  2. 6OVRQ
  3. 5TTC
  4. 4SYNTTC
  5. 3LISTEN
  6. 2TEST
  7. 1ENASTB
  8. 0SWRES
8 fields
FieldBitsWhat it does
ABRQ7Abort Request
OVRQ6Overload Frame Request
TTC5Time Trigger Communication
SYNTTC4Synchronization of TTC
LISTEN3Listening Mode
TEST2Test Mode
ENASTB1Enable / Standby
SWRES0Software Reset Request

CANGSTACAN General Status Register

Address
0xD9
Reset
0x00
Access
read/write
  1. 7–
  2. 6OVRG
  3. 5–
  4. 4TXBSY
  5. 3RXBSY
  6. 2ENFG
  7. 1BOFF
  8. 0ERRP
6 fields
FieldBitsWhat it does
OVRG6Overload Frame Flag
TXBSY4Transmitter Busy
RXBSY3Receiver Busy
ENFG2Enable Flag
BOFF1Bus Off Mode
ERRP0Error Passive Mode

CANGITCAN General Interrupt Register

Address
0xDA
Reset
0x00
Access
read/write
  1. 7CANIT
  2. 6BOFFIT
  3. 5OVRTIM
  4. 4BXOK
  5. 3SERG
  6. 2CERG
  7. 1FERG
  8. 0AERG
8 fields
FieldBitsWhat it does
CANIT7General Interrupt Flag
BOFFIT6Bus Off Interrupt Flag
OVRTIM5Overrun CAN Timer
BXOK4Burst Receive Interrupt
SERG3Stuff Error General
CERG2CRC Error General
FERG1Form Error General
AERG0Acknowledgement Error General

CANGIECAN General Interrupt Enable Register

Address
0xDB
Reset
0x00
Access
read/write
  1. 7ENIT
  2. 6ENBOFF
  3. 5ENRX
  4. 4ENTX
  5. 3ENERR
  6. 2ENBX
  7. 1ENERG
  8. 0ENOVRT
8 fields
FieldBitsWhat it does
ENIT7Enable all Interrupts
ENBOFF6Enable Bus Off INterrupt
ENRX5Enable Receive Interrupt
ENTX4Enable Transmit Interrupt
ENERR3Enable MOb Error Interrupt
ENBX2Enable Burst Receive Interrupt
ENERG1Enable General Error Interrupt
ENOVRT0Enable CAN Timer Overrun Interrupt

CANEN2Enable MOb Register

Address
0xDC
Reset
0x00
Access
read/write
  1. 7ENMOB7
  2. 6ENMOB6
  3. 5ENMOB5
  4. 4ENMOB4
  5. 3ENMOB3
  6. 2ENMOB2
  7. 1ENMOB1
  8. 0ENMOB0
1 field
FieldBitsWhat it does
ENMOB7:0Enable MOb

CANEN1Enable MOb Register

Address
0xDD
Reset
0x00
Access
read/write
  1. 7–
  2. 6ENMOB6
  3. 5ENMOB5
  4. 4ENMOB4
  5. 3ENMOB3
  6. 2ENMOB2
  7. 1ENMOB1
  8. 0ENMOB0
1 field
FieldBitsWhat it does
ENMOB6:0Enable MOb

CANIE2Enable Interrupt MOb Register

Address
0xDE
Reset
0x00
Access
read/write
  1. 7IEMOB7
  2. 6IEMOB6
  3. 5IEMOB5
  4. 4IEMOB4
  5. 3IEMOB3
  6. 2IEMOB2
  7. 1IEMOB1
  8. 0IEMOB0
1 field
FieldBitsWhat it does
IEMOB7:0Interrupt Enable by MOb

CANIE1Enable Interrupt MOb Register

Address
0xDF
Reset
0x00
Access
read/write
  1. 7–
  2. 6IEMOB6
  3. 5IEMOB5
  4. 4IEMOB4
  5. 3IEMOB3
  6. 2IEMOB2
  7. 1IEMOB1
  8. 0IEMOB0
1 field
FieldBitsWhat it does
IEMOB6:0Interrupt Enable by MOb

CANSIT2CAN Status Interrupt MOb Register

Address
0xE0
Reset
0x00
Access
read/write
  1. 7SIT7
  2. 6SIT6
  3. 5SIT5
  4. 4SIT4
  5. 3SIT3
  6. 2SIT2
  7. 1SIT1
  8. 0SIT0
1 field
FieldBitsWhat it does
SIT7:0Status of Interrupt by MOb

CANSIT1CAN Status Interrupt MOb Register

Address
0xE1
Reset
0x00
Access
read/write
  1. 7–
  2. 6SIT6
  3. 5SIT5
  4. 4SIT4
  5. 3SIT3
  6. 2SIT2
  7. 1SIT1
  8. 0SIT0
1 field
FieldBitsWhat it does
SIT6:0Status of Interrupt by MOb

CANBT1Bit Timing Register 1

Address
0xE2
Reset
0x00
Access
read/write
  1. 7–
  2. 6BRP5
  3. 5BRP4
  4. 4BRP3
  5. 3BRP2
  6. 2BRP1
  7. 1BRP0
  8. 0–
1 field
FieldBitsWhat it does
BRP6:1Baud Rate Prescaler bits

CANBT2Bit Timing Register 2

Address
0xE3
Reset
0x00
Access
read/write
  1. 7–
  2. 6SJW1
  3. 5SJW0
  4. 4–
  5. 3PRS2
  6. 2PRS1
  7. 1PRS0
  8. 0–
2 fields
FieldBitsWhat it does
SJW6:5Re-Sync Jump Width
PRS3:1Propagation Time Segment

CANBT3Bit Timing Register 3

Address
0xE4
Reset
0x00
Access
read/write
  1. 7–
  2. 6PHS22
  3. 5PHS21
  4. 4PHS20
  5. 3PHS12
  6. 2PHS11
  7. 1PHS10
  8. 0SMP
3 fields
FieldBitsWhat it does
PHS26:4Phase Segments
PHS13:1Phase Segment 1
SMP0Sample Type

CANTCONTimer Control Register

Address
0xE5
Reset
0x00
Access
read/write
  1. 7TPRSC7
  2. 6TPRSC6
  3. 5TPRSC5
  4. 4TPRSC4
  5. 3TPRSC3
  6. 2TPRSC2
  7. 1TPRSC1
  8. 0TPRSC0
1 field
FieldBitsWhat it does
TPRSC7:0CAN Timer Prescaler

CANTIMTimer Register

Address
0xE6
Reset
0x0000
Access
read/write
Size
16-bit
1 field
FieldBitsWhat it does
CANTIM15:0CAN Timer Count

CANTTCTTC Timer Register

Address
0xE8
Reset
0x0000
Access
read/write
Size
16-bit
1 field
FieldBitsWhat it does
TIMTTC15:0TTC Timer Count

CANTECTransmit Error Counter Register

Address
0xEA
Reset
0x00
Access
read/write
  1. 7TEC7
  2. 6TEC6
  3. 5TEC5
  4. 4TEC4
  5. 3TEC3
  6. 2TEC2
  7. 1TEC1
  8. 0TEC0
1 field
FieldBitsWhat it does
TEC7:0Transmit Error Count

CANRECReceive Error Counter Register

Address
0xEB
Reset
0x00
Access
read/write
  1. 7REC7
  2. 6REC6
  3. 5REC5
  4. 4REC4
  5. 3REC3
  6. 2REC2
  7. 1REC1
  8. 0REC0
1 field
FieldBitsWhat it does
REC7:0Receive Error Count

CANHPMOBHighest Priority MOb Register

Address
0xEC
Reset
0x00
Access
read/write
  1. 7HPMOB3
  2. 6HPMOB2
  3. 5HPMOB1
  4. 4HPMOB0
  5. 3CGP3
  6. 2CGP2
  7. 1CGP1
  8. 0CGP0
2 fields
FieldBitsWhat it does
HPMOB7:4Highest Priority MOb number
CGP3:0CAN General purpose bits

CANPAGEPage MOb Register

Address
0xED
Reset
0x00
Access
read/write
  1. 7MOBNB3
  2. 6MOBNB2
  3. 5MOBNB1
  4. 4MOBNB0
  5. 3AINC
  6. 2INDX2
  7. 1INDX1
  8. 0INDX0
3 fields
FieldBitsWhat it does
MOBNB7:4MOb Number Bits
AINC3MOb Data Buffer Auto Increment
INDX2:0Data Buffer Index Bits

CANSTMOBMOb Status Register

Address
0xEE
Reset
0x00
Access
read/write
  1. 7DLCW
  2. 6TXOK
  3. 5RXOK
  4. 4BERR
  5. 3SERR
  6. 2CERR
  7. 1FERR
  8. 0AERR
8 fields
FieldBitsWhat it does
DLCW7Data Length Code Warning
TXOK6Transmit OK
RXOK5Receive OK
BERR4Bit Error
SERR3Stuff Error
CERR2CRC Error
FERR1Form Error
AERR0Acknowledgement Error

CANCDMOBMOb Control and DLC Register

Address
0xEF
Reset
0x00
Access
read/write
  1. 7CONMOB1
  2. 6CONMOB0
  3. 5RPLV
  4. 4IDE
  5. 3DLC3
  6. 2DLC2
  7. 1DLC1
  8. 0DLC0
4 fields
FieldBitsWhat it does
CONMOB7:6MOb Config Bits
RPLV5Reply Valid
IDE4Identifier Extension
DLC3:0Data Length Code Bits

CANIDT4Identifier Tag Register 4

Address
0xF0
Reset
0x00
Access
read/write
  1. 7IDT4
  2. 6IDT3
  3. 5IDT2
  4. 4IDT1
  5. 3IDT0
  6. 2RTRTAG
  7. 1RB1TAG
  8. 0RB0TAG
4 fields
FieldBitsWhat it does
IDT7:3Identifier Tag
RTRTAG2Remote Transmission Request Tag
RB1TAG1Reserved Bit 1 Tag
RB0TAG0Reserved Bit 0 Tag

CANIDT3Identifier Tag Register 3

Address
0xF1
Reset
0x00
Access
read/write
  1. 7IDT7
  2. 6IDT6
  3. 5IDT5
  4. 4IDT4
  5. 3IDT3
  6. 2IDT2
  7. 1IDT1
  8. 0IDT0
1 field
FieldBitsWhat it does
IDT7:0Identifier Tag

CANIDT2Identifier Tag Register 2

Address
0xF2
Reset
0x00
Access
read/write
  1. 7IDT7
  2. 6IDT6
  3. 5IDT5
  4. 4IDT4
  5. 3IDT3
  6. 2IDT2
  7. 1IDT1
  8. 0IDT0
1 field
FieldBitsWhat it does
IDT7:0Identifier Tag

CANIDT1Identifier Tag Register 1

Address
0xF3
Reset
0x00
Access
read/write
  1. 7IDT7
  2. 6IDT6
  3. 5IDT5
  4. 4IDT4
  5. 3IDT3
  6. 2IDT2
  7. 1IDT1
  8. 0IDT0
1 field
FieldBitsWhat it does
IDT7:0Identifier Tag

CANIDM4Identifier Mask Register 4

Address
0xF4
Reset
0x00
Access
read/write
  1. 7IDMSK4
  2. 6IDMSK3
  3. 5IDMSK2
  4. 4IDMSK1
  5. 3IDMSK0
  6. 2RTRMSK
  7. 1–
  8. 0IDEMSK
3 fields
FieldBitsWhat it does
IDMSK7:3Identifier Mask
RTRMSK2Remote Transmission Request Mask
IDEMSK0Identifier Extension Mask

CANIDM3Identifier Mask Register 3

Address
0xF5
Reset
0x00
Access
read/write
  1. 7IDMSK7
  2. 6IDMSK6
  3. 5IDMSK5
  4. 4IDMSK4
  5. 3IDMSK3
  6. 2IDMSK2
  7. 1IDMSK1
  8. 0IDMSK0
1 field
FieldBitsWhat it does
IDMSK7:0Identifier Mask

CANIDM2Identifier Mask Register 2

Address
0xF6
Reset
0x00
Access
read/write
  1. 7IDMSK7
  2. 6IDMSK6
  3. 5IDMSK5
  4. 4IDMSK4
  5. 3IDMSK3
  6. 2IDMSK2
  7. 1IDMSK1
  8. 0IDMSK0
1 field
FieldBitsWhat it does
IDMSK7:0Identifier Mask

CANIDM1Identifier Mask Register 1

Address
0xF7
Reset
0x00
Access
read/write
  1. 7IDMSK7
  2. 6IDMSK6
  3. 5IDMSK5
  4. 4IDMSK4
  5. 3IDMSK3
  6. 2IDMSK2
  7. 1IDMSK1
  8. 0IDMSK0
1 field
FieldBitsWhat it does
IDMSK7:0Identifier Mask

CANSTMTime Stamp Register

Address
0xF8
Reset
0x0000
Access
read/write
Size
16-bit
1 field
FieldBitsWhat it does
TIMSTM15:0Time Stamp Count

CANMSGMessage Data Register

Address
0xFA
Reset
0x00
Access
read/write
  1. 7MSG7
  2. 6MSG6
  3. 5MSG5
  4. 4MSG4
  5. 3MSG3
  6. 2MSG2
  7. 1MSG1
  8. 0MSG0
1 field
FieldBitsWhat it does
MSG7:0Message Data