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SAM9G45 [Summary]
6438IS–ATARM–12-Feb-13
10. Embedded Peripherals
10.1 Serial Peripheral Interface (SPI)
z Supports communication with serial external devices
z Four chip selects with external decoder support 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 Very fast transfers supported
z Transfers with baud rates up to MCK
z The chip select line may be left active to speed up transfers on the same device
10.2 Two Wire Interface (TWI)
z Compatibility with standard two-wire serial memory
z One, two or three bytes for slave address
z Sequential read/write operations
z Supports either master or slave modes
z Compatible with Standard Two-wire Serial Memories
z Master, Multi-master and Slave Mode Operation
z Bit Rate: Up to 400 Kbits
z General Call Supported in Slave mode
z Connection to Peripheral DMA Controller (PDC) Channel Capabilities Optimizes Data Transfers in Master Mode
Only
z One Channel for the Receiver, One Channel for the Transmitter
z Next Buffer Support
10.3 Universal Synchronous Asynchronous Receiver Transmitter (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 or 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 Receiver time-out and transmitter timeguard
z Optional Multi-drop Mode with address generation and detection
z Optional Manchester Encoding
