McSPI
module m
spim_clk
spim_simo
spim_somi
spim_csx
mcspi-006
McSPI
module m
spim_clk
spim_simo
spim_somi
spim_cs0
mcspi-007
Public Version
McSPI Functional Interface
www.ti.com
20.3 McSPI Functional Interface
20.3.1 Basic McSPI Pins for Master Mode
shows all of the McSPI interface signals in master mode.
Figure 20-7. McSPI Interface Signals in Master Mode
describes the McSPI I/O in master mode.
Table 20-1. McSPI I/O Description (Master Mode)
Signal Name
I/O
Description
Reset
(1)
spim_clk
O
SPIm module serial clock
(2)
Unknown
spim_simo
O
SPIm module serial data master out
Unknown
(slave input, master output)
spim_somi
I
SPIm module serial data master input
–
(slave output, master input)
spim_csx
O
SPIm module chip-select x output
Low
(1)
After reset, the SPI modules are in slave mode by default. This paragraph implies that the McSPI
module is configured in slave mode. (See the MCSPI_MODULCTRL[2] MS bit in the module control
register [MCSPI_MODULCTRL]).
(2)
This output signal is also used as re-timing input.
20.3.2 Basic McSPI Pins for Slave Mode
shows all of the McSPI interface signals in slave mode.
Figure 20-8. McSPI Interface Signals in Slave Mode
describes the McSPI I/O in slave mode.
2982
Multichannel SPI
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated