at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 32

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

10.4
10.4.1
10.4.2
10.4.3
32
Embedded Peripherals
AT91SAM9G20 Preliminary
Serial Peripheral Interface
Two-wire Interface
USART
• Supports communication with serial external devices
• Master or slave serial peripheral bus interface
• Very fast transfers supported
• 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
• Programmable Baud Rate Generator
• 5- to 9-bit full-duplex synchronous or asynchronous serial communications
master mode only
– Four chip selects with external decoder support allow communication with up to 15
– Serial memories, such as DataFlash and 3-wire EEPROMs
– Serial peripherals, such as ADCs, DACs, LCD Controllers, CAN Controllers and
– External co-processors
– 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
– Programmable delay between consecutive transfers
– Selectable mode fault detection
– Transfers with baud rates up to MCK
– The chip select line may be left active to speed up transfers on the same device
– One channel for the receiver, one channel for the transmitter
– Next buffer support
– 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
peripherals
Sensors
and data per chip select
6384B–ATARM–15-Dec-08