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Registers
1209
SPRUH91D–March 2013–Revised September 2016
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Serial Peripheral Interface (SPI)
27.3.7 SPI Pin Control Register 1 (SPIPC1)
The SPI pin control register 1 (SPIPC1) is shown in Figure 27-24 and described in Table 27-15.
Figure 27-24. SPI Pin Control Register 1 (SPIPC1)
31 16
Reserved
R-0
15 12 11 10 9 8
Reserved SOMIDIR SIMODIR CLKDIR ENADIR
R-0 R/W-0 R/W-0 R/W-0 R/W-0
7 1 0
Reserved SCS0DIR
R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 27-15. SPI Pin Control Register 1 (SPIPC1) Field Descriptions
Bit Field Value Description
31-12 Reserved 0 Reads return zero and writes have no effect.
11 SOMIDIR SPIx_SOMI pin direction. Controls the direction of the SPIx_SOMI pin when it is used as a general-
purpose I/O pin. If the SPIx_SOMI pin is used as a SPI functional pin, the I/O direction is determined by
whether the SPI is configured as master or slave.
0 SPIx_SOMI pin is an input.
1 SPIx_SOMI pin is an output.
10 SIMODIR SPIx_SIMO pin direction. Controls the direction of the SPIx_SIMO pin when it is used as a general-
purpose I/O pin. If the SPIx_SIMO pin is used as a SPI functional pin, the I/O direction is determined by
whether the SPI is configured as master or slave.
0 SPIx_SIMO pin is an input.
1 SPIx_SIMO pin is an output.
9 CLKDIR SPIx_CLK pin direction. Controls the direction of the SPIx_CLK pin when it is used as a general-
purpose I/O pin. If the SPIx_CLK pin is used as a SPI functional pin, the I/O direction is determined by
whether the SPI is configured as master or slave.
0 SPIx_CLK pin is an input.
1 SPIx_CLK pin is an output.
8 ENADIR SPIx_ENA pin direction. Controls the direction of the SPIx_ENA pin when it is used as a general-
purpose I/O pin. If the SPIx_ENA pin is used as a SPI functional pin, then the I/O direction is
determined by whether the SPI is configured as master or slave.
0 SPIx_ENA pin is an input.
1 SPIx_ENA pin is an output.
7-1 Reserved 0 Reserved
0 SCS0DIR SPIx_SCS[0] pin direction. Controls the direction of the SPIx_SCS[0] pin when it is used as a general-
purpose I/O pin. If the SPIx_SCS[0] pin is used as a SPI functional pin, then the I/O direction is
determined by whether the SPI is configured as master or slave.
0 SPIx_SCS[0] pin is an input.
1 SPIx_SCS[0] pin is an output.
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