SAM4SD16B datasheet(52/67 Pages) ATMEL

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11100BS–ATARM–31-Jul-12

SAM4S Series [Preliminary]

11. Embedded Peripherals Overview

11.1

Serial Peripheral Interface (SPI)

• 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

• Connection to PDC channel capabilities optimizes data transfers

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

– Next buffer support

11.2

Two Wire Interface (TWI)

• Master, Multi-Master and Slave Mode Operation

• Compatibility with Atmel two-wire interface, serial memory and I

2C 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

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

– Next buffer support

11.3

Universal Asynchronous Receiver Transceiver (UART)

•Two-pin UART

– Independent receiver and transmitter with a common programmable Baud Rate

Generator

– Even, Odd, Mark or Space Parity Generation

– Parity, Framing and Overrun Error Detection

– Automatic Echo, Local Loopback and Remote Loopback Channel Modes

– Support for two PDC channels with connection to receiver and transmitter

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