44.2.2 PCS1–PCS3—Peripheral Chip Selects 1–3
Master mode: Peripheral Chip Selects 1–3 (O)—Select an SPI slave to receive data
transmitted by the module.
Slave mode: Unused
44.2.3 PCS4—Peripheral Chip Select 4
Master mode: Peripheral Chip Select 4 (O)—Selects an SPI slave to receive data
transmitted by the module.
Slave mode: Unused
44.2.4 PCS5/PCSS—Peripheral Chip Select 5/Peripheral Chip
Select Strobe
Master mode:
• Peripheral Chip Select 5 (O)—Used only when the peripheral-chip-select strobe is
disabled (MCR[PCSSE]). Selects an SPI slave to receive data transmitted by the
module.
• Peripheral Chip Select Strobe (O)—Used only when the peripheral-chip-select strobe
is enabled (MCR[PCSSE]). Strobes an off-module peripheral-chip-select
demultiplexer, which decodes the module's PCS signals other than PCS5, preventing
glitches on the demultiplexer outputs.
Slave mode: Unused
44.2.5 SCK—Serial Clock
Master mode: Serial Clock (O)—Supplies a clock signal from the module to SPI slaves.
Slave mode: Serial Clock (I)—Supplies a clock signal to the module from an SPI master.
44.2.6 SIN—Serial Input
Master mode: Serial Input (I)—Receives serial data.
Slave mode: Serial Input (I)—Receives serial data.
Chapter 44 Serial Peripheral Interface (SPI)
K22F Sub-Family Reference Manual , Rev. 3, 7/2014
Freescale Semiconductor, Inc.
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