25.2.2 Signal Description

Table 25-1. Signals in Host and Client Mode
Signal Description Pin Configuration
Host Mode Client Mode
MOSI Host Out Client In User defined(1) Input
MISO Host In Client Out Input User defined(1,2)
SCK Serial Clock User defined(1) Input
SS Client Select User defined(1) Input
Note:
  1. If the pin data direction is configured as output, the pin level is controlled by the SPI.
  2. If the SPI is in Client mode and the MISO pin data direction is configured as output, the SS pin controls the MISO pin output in the following way:
    • If the SS pin is driven low, the MISO pin is controlled by the SPI
    • If the SS pin is driven high, the MISO pin is tri-stated
When the SPI module is enabled, the pin data direction for the signals marked with “Input” in Table 25-1 is overridden.