7
SAMG55 [SUMMARY DATASHEET]
Atmel-11289ES-ATARM-SAM-G55G-SAM-G55J-Summary-Datasheet_25-May-16
PIO Controller - PIOA - PIOB
PA0–PA31 Parallel I/O Controller A I/O – VDDIO
Pulled-up input at reset. No
pull-down for PA3/PA4/PA14
PB0–PB15
(1)
Parallel I/O Controller B I/O – VDDIO Pulled-up input at reset
Wakeup Pins
WKUP0–15 Wakeup Pin / External Interrupt I/O – VDDIO
Wakeup pins are used also
as External Interrupt
Serial Peripheral Interface - SPIx
MISOx Master In Slave Out I/O – – –
MOSIx Master Out Slave In I/O – – –
SPCKx SPI Serial Clock I/O – – High Speed Pad
NPCS0x SPI Peripheral Chip Select 0 I/O Low – –
NPCS1x SPI Peripheral Chip Select Output Low – –
Two-Wire Interface - TWIx
TWDx TWIx Two-wire Serial Data I/O – – High Speed Pad for TWD0
TWCKx TWIx Two-wire Serial Clock I/O – –
High Speed Pad for
TWDCK0
Universal Synchronous Asynchronous Receiver Transmitter USARTx
SCKx USART Serial Clock I/O – – –
TXDx USART Transmit Data I/O – – –
RXDx USART Receive Data Input – – –
RTSx USART Request To Send Output – – –
CTSx USART Clear To Send Input – – –
Timer/Counter - TCx
TCLKx TC Channel x External Clock Input Input – – –
TIOAx TC Channel x I/O Line A I/O – – –
TIOBx TC Channel x I/O Line B I/O – – –
12-bit Analog-to-Digital Converter - ADC
AD0–AD7 Analog Inputs Analog – – –
ADTRG ADC Trigger Input – – –
ADVREF ADC Voltage Reference Input – –
Only available on 64-pin
package
Inter-IC Sound Controller - I2SCx
I2SMCKx Master Clock Output – – –
I2SCKx Serial Clock I/O – – –
I2SWSx I
2
S Word Select I/O – – –
I2SDIx Serial Data Input Input – – –
I2SDOx Serial Data Output Output – – –
Table 3-1. Signal Description List (Continued)
Signal Name Function Type
Active
Level
Voltage
Reference Comments
