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6384DS–ATARM–13-Jan-10
AT91SAM9G20 Summary
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
相关PDF资料
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AT91SAM9XE512-QU MCU ARM9 512K FLASH 208-PQFP
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相关代理商/技术参数
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