LM3S5739 Datasheet, PDF (545/856 Pages) Texas Instruments – Stellaris® LM3S5739 Microcontroller

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
Stellaris® LM3S5739 Microcontroller
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
Table 14-1 on page 546 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 Assignment" lists the possible GPIO
pin placements for the SSI signals. The AFSEL bit in the GPIO Alternate Function Select
November 17, 2011
545
Texas Instruments-Production Data