Datasheet

SAM7S Series [DATASHEET]

6175KS–ATARM–25-Oct-12

10.5 Serial Peripheral Interface

z Supports communication with external serial devices

z Four chip selects with external decoder allow communication with up to 15 peripherals

z Serial memories, such as DataFlash

and 3-wire EEPROMs

z Serial peripherals, such as ADCs, DACs, LCD Controllers, CAN Controllers and Sensors

z External co-processors

z Master or slave serial peripheral bus interface

z 8- to 16-bit programmable data length per chip select

z Programmable phase and polarity per chip select

z Programmable transfer delays between consecutive transfers and between clock and data per chip select

z Programmable delay between consecutive transfers

z Selectable mode fault detection

z Maximum frequency at up to Master Clock

10.6 Two-wire Interface

z Master Mode only (SAM7S512/256/128/64/321/32)

z Master, Multi-Master and Slave Mode support (SAM7S161/16)

z General Call supported in Slave Mode (SAM7S161/16)

z Compatibility with I

C compatible devices (refer to the TWI sections of the datasheet)

z One, two or three bytes internal address registers for easy Serial Memory access

z 7-bit or 10-bit slave addressing

z Sequential read/write operations

10.7 USART

z Programmable Baud Rate Generator

z 5- to 9-bit full-duplex synchronous or asynchronous serial communications

z 1, 1.5 or 2 stop bits in Asynchronous Mode

z 1 or 2 stop bits in Synchronous Mode

z Parity generation and error detection

z Framing error detection, overrun error detection

z MSB or LSB first

z Optional break generation and detection

z By 8 or by 16 over-sampling receiver frequency

z Hardware handshaking RTS - CTS

z Modem Signals Management DTR-DSR-DCD-RI on USART1 (not present on SAM7S32/16)

z Receiver time-out and transmitter timeguard

z Multi-drop Mode with address generation and detection

z RS485 with driver control signal

z ISO7816, T = 0 or T = 1 Protocols for interfacing with smart cards

z NACK handling, error counter with repetition and iteration limit

z IrDA modulation and demodulation

z Communication at up to 115.2 Kbps

z Test Modes

z Remote Loopback, Local Loopback, Automatic Echo