SAM7S256_14 Datasheet, PDF (37/775 Pages) ATMEL Corporation – ARM-based Flash MCU

10.5
Serial Peripheral Interface
 Supports communication with external serial devices
 Four chip selects with external decoder allow communication with up to 15 peripherals
 Serial memories, such as DataFlash^® and 3-wire EEPROMs
 Serial peripherals, such as ADCs, DACs, LCD Controllers, CAN Controllers and Sensors
 External co-processors
 Master or slave serial peripheral bus interface
 8- to 16-bit programmable data length per chip select
 Programmable phase and polarity per chip select
 Programmable transfer delays between consecutive transfers and between clock and data per chip select
 Programmable delay between consecutive transfers
 Selectable mode fault detection
 Maximum frequency at up to Master Clock
10.6
Two-wire Interface
 Master Mode only (SAM7S512/256/128/64/321/32)
 Master, Multi-Master and Slave Mode support (SAM7S161/16)
 General Call supported in Slave Mode (SAM7S161/16)
 Compatibility with I²C compatible devices (refer to the TWI sections of the datasheet)
 One, two or three bytes internal address registers for easy Serial Memory access
 7-bit or 10-bit slave addressing
 Sequential read/write operations
10.7
USART
 Programmable Baud Rate Generator
 5- to 9-bit full-duplex synchronous or asynchronous serial communications
 1, 1.5 or 2 stop bits in Asynchronous Mode
 1 or 2 stop bits in Synchronous Mode
 Parity generation and error detection
 Framing error detection, overrun error detection
 MSB or LSB first
 Optional break generation and detection
 By 8 or by 16 over-sampling receiver frequency
 Hardware handshaking RTS - CTS
 Modem Signals Management DTR-DSR-DCD-RI on USART1 (not present on SAM7S32/16)
 Receiver time-out and transmitter timeguard
 Multi-drop Mode with address generation and detection
 RS485 with driver control signal
 ISO7816, T = 0 or T = 1 Protocols for interfacing with smart cards
 NACK handling, error counter with repetition and iteration limit
 IrDA modulation and demodulation
 Communication at up to 115.2 Kbps
 Test Modes
 Remote Loopback, Local Loopback, Automatic Echo
SAM7S Series [DATASHEET] 37
6175M–ATARM–26-Oct-12