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SAM3U Datasheet, PDF (47/59 Pages) ATMEL Corporation – AT91SAM ARM-based Flash MCU | |||
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SAM3U Series
12. Embedded Peripherals Overview
12.1
Serial Peripheral Interface (SPI)
⢠Supports communication with serial external devices
â Four chip selects with external decoder support allow communication with up to 15
peripherals
â Serial memories, such as DataFlash and 3-wire EEPROMs
â Serial peripherals, such as ADCs, DACs, LCD Controllers, CAN Controllers and
Sensors
â External co-processors
⢠Master or slave serial peripheral bus interface
â 8- to 16-bit programmable data length per chip select
â Programmable phase and polarity per chip select
â Programmable transfer delays between consecutive transfers and between clock
and data per chip select
â Programmable delay between consecutive transfers
â Selectable mode fault detection
⢠Very fast transfers supported
â Transfers with baud rates up to MCK
â The chip select line may be left active to speed up transfers on the same device
12.2
Two Wire Interface (TWI)
⢠Master, Multi-Master and Slave Mode Operation
⢠Compatibility with Atmel two-wire interface, serial memory and I2C compatible devices
⢠One, two or three bytes for slave address
⢠Sequential read/write operations
⢠Bit Rate: Up to 400 kbit/s
⢠General Call Supported in Slave Mode
⢠Connecting to PDC channel capabilities optimizes data transfers in Master Mode only
â One channel for the receiver, one channel for the transmitter
â Next buffer support
12.3
Universal Asynchronous Receiver Transceiver (UART)
⢠Two-pin UART
â Implemented features are 100% compatible with the standard Atmel USART
â Independent receiver and transmitter with a common programmable Baud Rate
Generator
â Even, Odd, Mark or Space Parity Generation
â Parity, Framing and Overrun Error Detection
â Automatic Echo, Local Loopback and Remote Loopback Channel Modes
â Support for two PDC channels with connection to receiver and transmitter
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6430ESâATARMâ22-Aug-11
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