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Chapter 19 Port Integration Module (S12XFPIMV2)
MC9S12XF - Family Reference Manual, Rev.1.19
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Freescale Semiconductor
the I-bit in the CPU condition code register. It is inhibited at reset so this pin is initially congured as a
simple input with a pull-up.
Port E pin PE[0] can be used for either general-purpose input or as the level-sensitive XIRQ interrupt input.
XIRQ can be enabled by clearing the X-bit in the CUP’s condition code register. It is inhibited at reset so
this pin is initially congured as a high-impedance input with a pull-up.
Port E pins PE[5] and PE[6] are congured for reduced input threshold in certain modes (refer to
S12X_EBI Block Guide).
19.4.3.5
Port K
Port K pins PK[7:0] can be used for either general-purpose I/O, or with the external bus interface. In this
case Port K pins PK[6:0] are associated with the external address bus outputs ADDR22-ADDR16 and PK7
is associated to the EWAIT input.
Port K pin PE[7] is congured for reduced input threshold in certain modes (refer to S12X_EBI Block
Guide).
19.4.3.6
Port T
This port is associated with the ECT module, or with the FlexRay subsystem.
Port T pins PT[7:0] can be used for either general-purpose I/O, or with the channels of the Enhanced
Capture Timer.
19.4.3.7
Port S
This port is associated with SCI0, SCI1 and SPI0.
Port S pins PS[7:4] can be used either for general-purpose I/O, or with the SPI0 subsystem.
Port S pins PS[3:2] can be used either for general-purpose I/O, or with the SCI1 subsystem.
Port S pins PS[1:0] can be used either for general-purpose I/O, or with the SCI0 subsystem.
19.4.3.8
Port M
This port is associated with the CAN0, SPI1, PMF and chip selects CS0, CS1, CS2 and CS3.
Port M pins PM[7:4] can be used for either general purpose I/O, or with the SPI1 subsystem.
Port M pins PM[3:2] can be used for either general purpose I/O, or as fault inputs of the PMF subsystem.
Port M pins PM[1:0] can be used for either general purpose I/O, or with CAN0 subsystem.
Port M pins PM[7] and PM[4:2] can also be used as chip select outputs.
19.4.3.9
Port P
This port is associated with the PMF.