LM3S8971 Luminary Micro, Inc, LM3S8971 Datasheet - Page 343
LM3S8971
Manufacturer Part Number
LM3S8971
Description
Lm3s8971 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S8971.pdf
(602 pages)
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14
14.1
14.2
July 26, 2008
Synchronous Serial Interface (SSI)
The Stellaris
serial communication with peripheral devices that have either Freescale SPI, MICROWIRE, or Texas
Instruments synchronous serial interfaces.
The Stellaris
■
■
■
■
■
■
Block Diagram
Figure 14-1. SSI Module Block Diagram
Functional Description
The SSI performs serial-to-parallel conversion on data received from a peripheral device. The CPU
accesses data, control, and status information. The transmit and receive paths are buffered with
SSIPCellID0
SSIPCellID1
SSIPCellID2
SSIPCellID3
Master or slave operation
Programmable clock bit rate and prescale
Separate transmit and receive FIFOs, 16 bits wide, 8 locations deep
Programmable interface operation for Freescale SPI, MICROWIRE, or Texas Instruments
synchronous serial interfaces
Programmable data frame size from 4 to 16 bits
Internal loopback test mode for diagnostic/debug testing
System Clock
Interrupt
Identification Registers
®
®
Synchronous Serial Interface (SSI) is a master or slave interface for synchronous
SSI module has the following features:
SSIPeriphID0
SSIPeriphID1
SSIPeriphID2
SSIPeriphID3
Control / Status
SSICR0
SSICR1
SSISR
SSIPeriphID4
SSIPeriphID5
SSIPeriphID6
SSIPeriphID7
Preliminary
Interrupt Control
Prescaler
SSICPSR
Clock
SSIDR
SSIMIS
SSIRIS
SSIICR
SSIIM
RxFIFO
TxFIFO
8 x 16
8 x 16
.
.
.
.
.
.
LM3S8971 Microcontroller
Transmit/
Receive
Logic
343
SSITx
SSIRx
SSIFss
SSIClk
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