Datasheet

691
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
35.4 Application Block Diagram
Figure 35-2. Application Block Diagram
35.5 I/O Lines Description
Smart
Card
Slot
USART
RS232
Drivers
Modem
RS485
Drivers
Differential
Bus
IrDA
Transceivers
Modem
Driver
Field Bus
Driver
EMV
Driver
IrDA
Driver
IrLAP
RS232
Drivers
Serial
Port
Serial
Driver
PPP
PSTN
SPI
Driver
SPI
Transceiver
Table 35-2. I/O Line Description
Name Description Type Active Level
SCK Serial Clock I/O
TXD
Transmit Serial Data
or Master Out Slave In (MOSI) in SPI Master Mode
or Master In Slave Out (MISO) in SPI Slave Mode
I/O
RXD
Receive Serial Data
or Master In Slave Out (MISO) in SPI Master Mode
or Master Out Slave In (MOSI) in SPI Slave Mode
Input
RI Ring Indicator Input Low
DSR Data Set Ready Input Low
DCD Data Carrier Detect Input Low
DTR Data Terminal Ready Output Low
CTS
Clear to Send
or Slave Select (NSS) in SPI Slave Mode
Input Low
RTS
Request to Send
or Slave Select (NSS) in SPI Master Mode
Output Low