AT91SAM9G20 datasheet(34/832 Pages) ATMEL

34 / 832 page

6384D–ATARM–04-May-09

AT91SAM9G20 Preliminary

10.4

Embedded Peripherals

10.4.1

Serial Peripheral Interface

• Supports communication with serial external devices

– Four chip selects with external decoder support 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

• Very fast transfers supported

– Transfers with baud rates up to MCK

– The chip select line may be left active to speed up transfers on the same device

10.4.2

Two-wire Interface

• Compatibility with standard two-wire serial memory

• One, two or three bytes for slave address

• Sequential read/write operations

• Supports either master or slave modes

• Compatible with standard two-wire serial memories

• Master, multi-master and slave mode operation

• Bit rate: up to 400 Kbits

• General Call supported in slave mode

• Connection to Peripheral DMA Controller (PDC) capabilities optimizes data transfers in

master mode only

– One channel for the receiver, one channel for the transmitter

– Next buffer support

10.4.3

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 or 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

AT91SAM9G20 Datasheet(PDF) 34 Page - ATMEL Corporation

AT91SAM9G20 Datasheet(HTML) 34 Page - ATMEL Corporation

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