ATSAML21E18A SERCOM1 Registers – 42 with their bits and fields

I2CM.CTRLAI2CM Control A

Address: 0x42000400
Reset: 0x00000000
Access: read/write
Size: 32-bit

12 fields

Field	Bits	What it does
LOWTOUTEN	30	SCL Low Timeout Enable
INACTOUT	29:28	Inactive Time-Out
SCLSM	27	SCL Clock Stretch Mode
SPEED	25:24	Transfer Speed
SEXTTOEN	23	Slave SCL Low Extend Timeout
MEXTTOEN	22	Master SCL Low Extend Timeout
SDAHOLD	21:20	SDA Hold Time
PINOUT	16	Pin Usage
RUNSTDBY	7	Run in Standby
MODE	4:2	Operating Mode
ENABLE	1	Enable
SWRST	0	Software Reset

I2CS.CTRLAI2CS Control A

Address: 0x42000400
Reset: 0x00000000
Access: read/write
Size: 32-bit

10 fields

Field	Bits	What it does
LOWTOUTEN	30	SCL Low Timeout Enable
SCLSM	27	SCL Clock Stretch Mode
SPEED	25:24	Transfer Speed
SEXTTOEN	23	Slave SCL Low Extend Timeout
SDAHOLD	21:20	SDA Hold Time
PINOUT	16	Pin Usage
RUNSTDBY	7	Run during Standby
MODE	4:2	Operating Mode
ENABLE	1	Enable
SWRST	0	Software Reset

SPI.CTRLASPI Control A

Address: 0x42000400
Reset: 0x00000000
Access: read/write
Size: 32-bit

11 fields

Field	Bits	What it does
DORD	30	Data Order
CPOL	29	Clock Polarity
CPHA	28	Clock Phase
FORM	27:24	Frame Format
DIPO	21:20	Data In Pinout
DOPO	17:16	Data Out Pinout
IBON	8	Immediate Buffer Overflow Notification
RUNSTDBY	7	Run during Standby
MODE	4:2	Operating Mode
ENABLE	1	Enable
SWRST	0	Software Reset

USART.CTRLAUSART Control A

Address: 0x42000400
Reset: 0x00000000
Access: read/write
Size: 32-bit

13 fields

Field	Bits	What it does
DORD	30	Data Order
CPOL	29	Clock Polarity
CMODE	28	Communication Mode
FORM	27:24	Frame Format
SAMPA	23:22	Sample Adjustment
RXPO	21:20	Receive Data Pinout
TXPO	17:16	Transmit Data Pinout
SAMPR	15:13	Sample
IBON	8	Immediate Buffer Overflow Notification
RUNSTDBY	7	Run during Standby
MODE	4:2	Operating Mode
ENABLE	1	Enable
SWRST	0	Software Reset

I2CM.CTRLBI2CM Control B

Address: 0x42000404
Reset: 0x00000000
Access: read/write
Size: 32-bit

4 fields

Field	Bits	What it does
ACKACT	18	Acknowledge Action
CMD	17:16	Command
QCEN	9	Quick Command Enable
SMEN	8	Smart Mode Enable

I2CS.CTRLBI2CS Control B

Address: 0x42000404
Reset: 0x00000000
Access: read/write
Size: 32-bit

6 fields

Field	Bits	What it does
ACKACT	18	Acknowledge Action
CMD	17:16	Command
AMODE	15:14	Address Mode
AACKEN	10	Automatic Address Acknowledge
GCMD	9	PMBus Group Command
SMEN	8	Smart Mode Enable

SPI.CTRLBSPI Control B

Address: 0x42000404
Reset: 0x00000000
Access: read/write
Size: 32-bit

6 fields

Field	Bits	What it does
RXEN	17	Receiver Enable
AMODE	15:14	Address Mode
MSSEN	13	Master Slave Select Enable
SSDE	9	Slave Select Low Detect Enable
PLOADEN	6	Data Preload Enable
CHSIZE	2:0	Character Size

USART.CTRLBUSART Control B

Address: 0x42000404
Reset: 0x00000000
Access: read/write
Size: 32-bit

8 fields

Field	Bits	What it does
RXEN	17	Receiver Enable
TXEN	16	Transmitter Enable
PMODE	13	Parity Mode
ENC	10	Encoding Format
SFDE	9	Start of Frame Detection Enable
COLDEN	8	Collision Detection Enable
SBMODE	6	Stop Bit Mode
CHSIZE	2:0	Character Size

I2CM.BAUDI2CM Baud Rate

Address: 0x4200040C
Reset: 0x00000000
Access: read/write
Size: 32-bit

4 fields

Field	Bits	What it does
HSBAUD	23:16	High Speed Baud Rate Value
BAUDLOW	15:8	Baud Rate Value Low
BAUD	7:0	Baud Rate Value
HSBAUDLOW	31:24	High Speed Baud Rate Value Low

SPI.BAUDSPI Baud Rate

Address: 0x4200040C
Reset: 0x00
Access: read/write

7BAUD7
6BAUD6
5BAUD5
4BAUD4
3BAUD3
2BAUD2
1BAUD1
0BAUD0

1 field

Field	Bits	What it does
BAUD	7:0	Baud Rate Value

USART.BAUDUSART Baud Rate

Address: 0x4200040C
Reset: 0x0000
Access: read/write
Size: 16-bit

3 fields

Field	Bits	What it does
BAUD	15:0	Baud Rate Value
FP	15:13	Fractional Part
BAUD	12:0	Baud Rate Value

USART.RXPLUSART Receive Pulse Length

Address: 0x4200040E
Reset: 0x00
Access: read/write

7RXPL7
6RXPL6
5RXPL5
4RXPL4
3RXPL3
2RXPL2
1RXPL1
0RXPL0

1 field

Field	Bits	What it does
RXPL	7:0	Receive Pulse Length

I2CM.INTENCLRI2CM Interrupt Enable Clear

Address: 0x42000414
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3–
2–
1SB
0MB

3 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Disable
SB	1	Slave On Bus Interrupt Disable
MB	0	Master On Bus Interrupt Disable

I2CS.INTENCLRI2CS Interrupt Enable Clear

Address: 0x42000414
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3–
2DRDY
1AMATCH
0PREC

4 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Disable
DRDY	2	Data Interrupt Disable
AMATCH	1	Address Match Interrupt Disable
PREC	0	Stop Received Interrupt Disable

SPI.INTENCLRSPI Interrupt Enable Clear

Address: 0x42000414
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3SSL
2RXC
1TXC
0DRE

5 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Disable
SSL	3	Slave Select Low Interrupt Disable
RXC	2	Receive Complete Interrupt Disable
TXC	1	Transmit Complete Interrupt Disable
DRE	0	Data Register Empty Interrupt Disable

USART.INTENCLRUSART Interrupt Enable Clear

Address: 0x42000414
Reset: 0x00
Access: read/write

7ERROR
6–
5RXBRK
4CTSIC
3RXS
2RXC
1TXC
0DRE

7 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Disable
RXBRK	5	Break Received Interrupt Disable
CTSIC	4	Clear To Send Input Change Interrupt Disable
RXS	3	Receive Start Interrupt Disable
RXC	2	Receive Complete Interrupt Disable
TXC	1	Transmit Complete Interrupt Disable
DRE	0	Data Register Empty Interrupt Disable

I2CM.INTENSETI2CM Interrupt Enable Set

Address: 0x42000416
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3–
2–
1SB
0MB

3 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Enable
SB	1	Slave On Bus Interrupt Enable
MB	0	Master On Bus Interrupt Enable

I2CS.INTENSETI2CS Interrupt Enable Set

Address: 0x42000416
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3–
2DRDY
1AMATCH
0PREC

4 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Enable
DRDY	2	Data Interrupt Enable
AMATCH	1	Address Match Interrupt Enable
PREC	0	Stop Received Interrupt Enable

SPI.INTENSETSPI Interrupt Enable Set

Address: 0x42000416
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3SSL
2RXC
1TXC
0DRE

5 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Enable
SSL	3	Slave Select Low Interrupt Enable
RXC	2	Receive Complete Interrupt Enable
TXC	1	Transmit Complete Interrupt Enable
DRE	0	Data Register Empty Interrupt Enable

USART.INTENSETUSART Interrupt Enable Set

Address: 0x42000416
Reset: 0x00
Access: read/write

7ERROR
6–
5RXBRK
4CTSIC
3RXS
2RXC
1TXC
0DRE

7 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt Enable
RXBRK	5	Break Received Interrupt Enable
CTSIC	4	Clear To Send Input Change Interrupt Enable
RXS	3	Receive Start Interrupt Enable
RXC	2	Receive Complete Interrupt Enable
TXC	1	Transmit Complete Interrupt Enable
DRE	0	Data Register Empty Interrupt Enable

I2CM.INTFLAGI2CM Interrupt Flag Status and Clear

Address: 0x42000418
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3–
2–
1SB
0MB

3 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt
SB	1	Slave On Bus Interrupt
MB	0	Master On Bus Interrupt

I2CS.INTFLAGI2CS Interrupt Flag Status and Clear

Address: 0x42000418
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3–
2DRDY
1AMATCH
0PREC

4 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt
DRDY	2	Data Interrupt
AMATCH	1	Address Match Interrupt
PREC	0	Stop Received Interrupt

SPI.INTFLAGSPI Interrupt Flag Status and Clear

Address: 0x42000418
Reset: 0x00
Access: read/write

7ERROR
6–
5–
4–
3SSL
2RXC
1TXC
0DRE

5 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt
SSL	3	Slave Select Low Interrupt Flag
RXC	2	Receive Complete Interrupt
TXC	1	Transmit Complete Interrupt
DRE	0	Data Register Empty Interrupt

USART.INTFLAGUSART Interrupt Flag Status and Clear

Address: 0x42000418
Reset: 0x00
Access: read/write

7ERROR
6–
5RXBRK
4CTSIC
3RXS
2RXC
1TXC
0DRE

7 fields

Field	Bits	What it does
ERROR	7	Combined Error Interrupt
RXBRK	5	Break Received Interrupt
CTSIC	4	Clear To Send Input Change Interrupt
RXS	3	Receive Start Interrupt
RXC	2	Receive Complete Interrupt
TXC	1	Transmit Complete Interrupt
DRE	0	Data Register Empty Interrupt

I2CM.STATUSI2CM Status

Address: 0x4200041A
Reset: 0x0000
Access: read/write
Size: 16-bit

9 fields

Field	Bits	What it does
LENERR	10	Length Error
SEXTTOUT	9	Slave SCL Low Extend Timeout
MEXTTOUT	8	Master SCL Low Extend Timeout
CLKHOLD	7	Clock Hold
LOWTOUT	6	SCL Low Timeout
BUSSTATE	5:4	Bus State
RXNACK	2	Received Not Acknowledge
ARBLOST	1	Arbitration Lost
BUSERR	0	Bus Error

I2CS.STATUSI2CS Status

Address: 0x4200041A
Reset: 0x0000
Access: read/write
Size: 16-bit

9 fields

Field	Bits	What it does
HS	10	High Speed
SEXTTOUT	9	Slave SCL Low Extend Timeout
CLKHOLD	7	Clock Hold
LOWTOUT	6	SCL Low Timeout
SR	4	Repeated Start
DIR	3	Read/Write Direction
RXNACK	2	Received Not Acknowledge
COLL	1	Transmit Collision
BUSERR	0	Bus Error

SPI.STATUSSPI Status

Address: 0x4200041A
Reset: 0x0000
Access: read/write
Size: 16-bit

1 field

Field	Bits	What it does
BUFOVF	2	Buffer Overflow

USART.STATUSUSART Status

Address: 0x4200041A
Reset: 0x0000
Access: read/write
Size: 16-bit

6 fields

Field	Bits	What it does
COLL	5	Collision Detected
ISF	4	Inconsistent Sync Field
CTS	3	Clear To Send
BUFOVF	2	Buffer Overflow
FERR	1	Frame Error
PERR	0	Parity Error

I2CM.SYNCBUSYI2CM Synchronization Busy

Address: 0x4200041C
Reset: 0x00000000
Access: read only
Size: 32-bit

3 fields

Field	Bits	What it does
SYSOP	2	System Operation Synchronization Busy
ENABLE	1	SERCOM Enable Synchronization Busy
SWRST	0	Software Reset Synchronization Busy

I2CS.SYNCBUSYI2CS Synchronization Busy

Address: 0x4200041C
Reset: 0x00000000
Access: read only
Size: 32-bit

2 fields

Field	Bits	What it does
ENABLE	1	SERCOM Enable Synchronization Busy
SWRST	0	Software Reset Synchronization Busy

SPI.SYNCBUSYSPI Synchronization Busy

Address: 0x4200041C
Reset: 0x00000000
Access: read only
Size: 32-bit

3 fields

Field	Bits	What it does
CTRLB	2	CTRLB Synchronization Busy
ENABLE	1	SERCOM Enable Synchronization Busy
SWRST	0	Software Reset Synchronization Busy

USART.SYNCBUSYUSART Synchronization Busy

Address: 0x4200041C
Reset: 0x00000000
Access: read only
Size: 32-bit

3 fields

Field	Bits	What it does
CTRLB	2	CTRLB Synchronization Busy
ENABLE	1	SERCOM Enable Synchronization Busy
SWRST	0	Software Reset Synchronization Busy

I2CM.ADDRI2CM Address

Address: 0x42000424
Reset: 0x00000000
Access: read/write
Size: 32-bit

5 fields

Field	Bits	What it does
LEN	23:16	Length
TENBITEN	15	Ten Bit Addressing Enable
HS	14	High Speed Mode
LENEN	13	Length Enable
ADDR	10:0	Address Value

I2CS.ADDRI2CS Address

Address: 0x42000424
Reset: 0x00000000
Access: read/write
Size: 32-bit

4 fields

Field	Bits	What it does
ADDRMASK	26:17	Address Mask
TENBITEN	15	Ten Bit Addressing Enable
ADDR	10:1	Address Value
GENCEN	0	General Call Address Enable

SPI.ADDRSPI Address

Address: 0x42000424
Reset: 0x00000000
Access: read/write
Size: 32-bit

2 fields

Field	Bits	What it does
ADDRMASK	23:16	Address Mask
ADDR	7:0	Address Value

I2CM.DATAI2CM Data

Address: 0x42000428
Reset: 0x00
Access: read/write

7DATA7
6DATA6
5DATA5
4DATA4
3DATA3
2DATA2
1DATA1
0DATA0

1 field

Field	Bits	What it does
DATA	7:0	Data Value

I2CS.DATAI2CS Data

Address: 0x42000428
Reset: 0x00
Access: read/write

7DATA7
6DATA6
5DATA5
4DATA4
3DATA3
2DATA2
1DATA1
0DATA0

1 field

Field	Bits	What it does
DATA	7:0	Data Value

SPI.DATASPI Data

Address: 0x42000428
Reset: 0x00000000
Access: read/write
Size: 32-bit

1 field

Field	Bits	What it does
DATA	8:0	Data Value

USART.DATAUSART Data

Address: 0x42000428
Reset: 0x0000
Access: read/write
Size: 16-bit

1 field

Field	Bits	What it does
DATA	8:0	Data Value

I2CM.DBGCTRLI2CM Debug Control

Address: 0x42000430
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1–
0DBGSTOP

1 field

Field	Bits	What it does
DBGSTOP	0	Debug Mode

SPI.DBGCTRLSPI Debug Control

Address: 0x42000430
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1–
0DBGSTOP

1 field

Field	Bits	What it does
DBGSTOP	0	Debug Mode

USART.DBGCTRLUSART Debug Control

Address: 0x42000430
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1–
0DBGSTOP

1 field

Field	Bits	What it does
DBGSTOP	0	Debug Mode

SERCOM1 Serial Communication Interface

SERCOM1 Serial Communication Interface