
Chapter 1 MC9S12XF-Family Reference Manual
MC9S12XF - Family Reference Manual, Rev.1.19
Freescale Semiconductor
59
1.2.8.28
PJ2 is a general purpose input or output pin. It can be congured as PMF current status bit for top/bottom
pulse width correction (IS2).
1.2.8.29
PJ1 is a general purpose input or output pin. It can be congured as PMF current status bit for top/bottom
pulse width correction (IS1).
1.2.8.30
PJ0 is a general purpose input or output pin. It can be congured as PMF current status bit for top/bottom
pulse width correction (IS0).
1.2.8.31
PK7 / EWAIT / ROMCTL — Port K I/O
PK7 is a general purpose input or output pin. During MCU emulation modes and normal expanded modes
of operation, this pin is used to enable the Flash EEEPROM memory in the memory map (ROMCTL). At
the rising edge of RESET, the state of this pin is latched to the ROMON bit. The EWAIT input signal
maintains the external bus access until the external device is ready to capture data (write) or provide data
(read).
The input voltage threshold for PK7 can be congured to reduced levels, to allow data from an external
3.3V peripheral to be read by the MCU operating at 5.0V.
1.2.8.32
PK[6:4] / ADDR[22:20] / ACC[2:0] — Port K I/O
PK[6:4] are general purpose input or output pins. During MCU expanded modes of operation, the
ACC[2:0] signals are used to indicate the access source of the bus cycle . This pins also provide the
expanded addresses ADDR[22:20] for the external bus. In Emulation modes ACC[2:0] is available and is
time multiplexed with the high addresses
1.2.8.33
PK[3:0] / ADDR[19:16] / IQSTAT[3:0] — Port K I/O
PK3-PK0 are general purpose input or output pins. In MCU expanded modes of operation, these pins
provide the expanded address ADDR[19:16] for the external bus and carry instruction pipe information.
1.2.8.34
PM7 / SS1 / CS3 — Port M I/O
PM7 is a general purpose input or output pin. It can be congured as SS pin for SPI1 (SS1). It can be
congured as Chip Select 3 (CS3).
1.2.8.35
PM6 / SCK1 — Port M I/O
PM6 is a general purpose input or output pin. It can be congured as the serial clock pin SCK of the Serial
Peripheral Interface 1 (SPI1).