LM3S1W16 Datasheet, PDF (636/794 Pages) Texas Instruments – Stellaris® LM3S1W16 Microcontroller

Synchronous Serial Interface (SSI)
14.1 Block Diagram
Figure 14-1. SSI Module Block Diagram
DMA Request
DMA Control
SSIDMACTL
Interrupt
Interrupt Control
Control/Status
SSIIM
SSIMIS
SSIRIS
SSIICR
SSICR0
SSICR1
SSISR
SSIDR
System Clock
Clock Prescaler
SSICPSR
TxFIFO
8 x 16
.
.
.
RxFIFO
8 x 16
.
.
.
SSITx
Transmit/
Receive
Logic
SSIRx
SSIClk
SSIFss
14.2
Identification Registers
SSIPCellID0
SSIPCellID1
SSIPCellID2
SSIPCellID3
SSIPeriphID0
SSIPeriphID1
SSIPeriphID2
SSIPeriphID3
SSIPeriphID4
SSIPeriphID5
SSIPeriphID6
SSIPeriphID7
Signal Description
The following table lists the external signals of the SSI module and describes the function of each.
The SSI signals are alternate functions for some GPIO signals and default to be GPIO signals at
reset., with the exception of the SSI0Clk, SSI0Fss, SSI0Rx, and SSI0Tx pins which default to
the SSI function. The column in the table below titled "Pin Mux/Pin Assignment" lists the possible
GPIO pin placements for the SSI signals. The AFSEL bit in the GPIO Alternate Function Select
(GPIOAFSEL) register (page 405) should be set to choose the SSI function. The number in
636
January 21, 2012
Texas Instruments-Production Data