ATxmega256A3 PR registers The 7 registers of PR (Clock System), from 0x70, with their reset value and every field. The ATxmega256A3 has 599 registers in 63 peripherals, one page each.
PR Clock System PRGENGeneral Power Reduction
Address 0x70
Reset 0x00
Access read/write 7 – 6 – 5 – 4 AES 3 – 2 RTC 1 EVSYS 0 DMA 4 fields
Field Bits What it does AES 4 AES RTC 2 Real-time Counter EVSYS 1 Event System DMA 0 DMA-Controller
PRPAPower Reduction Port A
Address 0x71
Reset 0x00
Access read/write 7 – 6 – 5 – 4 – 3 – 2 DAC 1 ADC 0 AC 3 fields
Field Bits What it does DAC 2 Port A DAC ADC 1 Port A ADC AC 0 Port A Analog Comparator
PRPBPower Reduction Port B
Address 0x72
Reset 0x00
Access read/write 7 – 6 – 5 – 4 – 3 – 2 DAC 1 ADC 0 AC 3 fields
Field Bits What it does DAC 2 Port B DAC ADC 1 Port B ADC AC 0 Port B Analog Comparator
PRPCPower Reduction Port C
Address 0x73
Reset 0x00
Access read/write 7 – 6 TWI 5 USART1 4 USART0 3 SPI 2 HIRES 1 TC1 0 TC0 7 fields
Field Bits What it does TWI 6 Port C Two-wire Interface USART1 5 Port C USART1 USART0 4 Port C USART0 SPI 3 Port C SPI HIRES 2 Port C AWEX TC1 1 Port C Timer/Counter1 TC0 0 Port C Timer/Counter0
PRPDPower Reduction Port D
Address 0x74
Reset 0x00
Access read/write 7 – 6 TWI 5 USART1 4 USART0 3 SPI 2 HIRES 1 TC1 0 TC0 7 fields
Field Bits What it does TWI 6 Port D Two-wire Interface USART1 5 Port D USART1 USART0 4 Port D USART0 SPI 3 Port D SPI HIRES 2 Port D AWEX TC1 1 Port D Timer/Counter1 TC0 0 Port D Timer/Counter0
PRPEPower Reduction Port E
Address 0x75
Reset 0x00
Access read/write 7 – 6 TWI 5 USART1 4 USART0 3 SPI 2 HIRES 1 TC1 0 TC0 7 fields
Field Bits What it does TWI 6 Port E Two-wire Interface USART1 5 Port E USART1 USART0 4 Port E USART0 SPI 3 Port E SPI HIRES 2 Port E AWEX TC1 1 Port E Timer/Counter1 TC0 0 Port E Timer/Counter0
PRPFPower Reduction Port F
Address 0x76
Reset 0x00
Access read/write 7 – 6 TWI 5 USART1 4 USART0 3 SPI 2 HIRES 1 TC1 0 TC0 7 fields
Field Bits What it does TWI 6 Port F Two-wire Interface USART1 5 Port F USART1 USART0 4 Port F USART0 SPI 3 Port F SPI HIRES 2 Port F AWEX TC1 1 Port F Timer/Counter1 TC0 0 Port F Timer/Counter0
BETA