Table 3-1.
Signal Name
Signal Description List (Continued)
Function
Type
Active
Level
Voltage
reference
Comments
Universal Synchronous Asynchronous Receiver Transmitter USARTx
SCKx
TXDx
RXDx
RTSx
CTSx
DTR1
DSR1
DCD1
RI1
USARTx Serial Clock
USARTx Transmit Data
USARTx Receive Data
USARTx Request To Send
USARTx Clear To Send
USART1 Data Terminal Ready
USART1 Data Set Ready
USART1 Data Carrier Detect
USART1 Ring Indicator
I/O
I/O
Input
Output
Input
I/O
Input
Output
Input
Synchronous Serial Controller - SSC
TD
RD
TK
RK
TF
RF
SSC Transmit Data
SSC Receive Data
SSC Transmit Clock
SSC Receive Clock
SSC Transmit Frame Sync
SSC Receive Frame Sync
Output
Input
I/O
I/O
I/O
I/O
Timer/Counter - TC
TCLKx
TIOAx
TIOBx
TC Channel x External Clock Input
TC Channel x I/O Line A
TC Channel x I/O Line B
Input
I/O
I/O
Pulse Width Modulation Controller- PWMC
PWMHx
PWM Waveform Output High for channel x
Output
The only output in
complementary mode
when dead time insertion
is enabled.
PWMLx
PWM Waveform Output Low for channel x
Output
PWMFI0
PWM Fault Input
Input
Serial Peripheral Interface - SPI
MISO
MOSI
SPCK
SPI_NPCS0
SPI_NPCS1 -
SPI_NPCS3
Master In Slave Out
Master Out Slave In
SPI Serial Clock
SPI Peripheral Chip Select 0
SPI Peripheral Chip Select
I/O
I/O
I/O
I/O
Output
Low
Low
10
SAM4S Series [Preliminary]
11100BS–ATARM–31-Jul-12
ATMEL [ ATMEL CORPORATION ]
