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LM3S9B81 Datasheet, PDF (635/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller | |||
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Stellaris® LM3S9B81 Microcontroller
15 Synchronous Serial Interface (SSI)
The Stellaris® microcontroller includes two Synchronous Serial Interface (SSI) modules. Each SSI
is a master or slave interface for synchronous serial communication with peripheral devices that
have either Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces.
The Stellaris® LM3S9B81 controller includes two SSI modules with the following features:
â Programmable interface operation for Freescale SPI, MICROWIRE, or Texas Instruments
synchronous serial interfaces
â Master or slave operation
â Programmable clock bit rate and prescaler
â Separate transmit and receive FIFOs, each 16 bits wide and 8 locations deep
â Programmable data frame size from 4 to 16 bits
â Internal loopback test mode for diagnostic/debug testing
â Standard FIFO-based interrupts and End-of-Transmission interrupt
â Efficient transfers using Micro Direct Memory Access Controller (µDMA)
â Separate channels for transmit and receive
â Receive single request asserted when data is in the FIFO; burst request asserted when FIFO
contains 4 entries
â Transmit single request asserted when there is space in the FIFO; burst request asserted
when FIFO contains 4 entries
June 29, 2010
635
Texas Instruments-Advance Information
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