Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
230 Freescale Semiconductor
4.3.2.38 Port P Data Register (PTP)
Read: Anytime.
Write: Anytime.
Port P pins 7, and 5–0 are associated with the PWM as well as the SPI1 and SPI2 modules. These pins can
be used as general purpose I/O when not used with any of the peripherals.
If the data direction bits of the associated I/O pins are set to logic level “1”, a read returns the value of the
port register, otherwise the buffered pin input state is read.
The PWM function takes precedence over the general purpose I/O and the SPI2 or SPI1 function if the
associated PWM channel is enabled. While channels 6 and 5-0 are output only if the respective channel is
enabled, channel 7 can be PWM output or input if the shutdown feature is enabled. Refer to PWM section
for details.
The SPI2 function takes precedence over the general purpose I/O function if enabled. Refer to SPI section
for details.
The SPI1 function takes precedence over the general purpose I/O function if enabled. Refer to SPI section
for details.
0x0258
76543210
R
PTP7 PTP6 PTP5 PTP4 PTP3 PTP2 PTP1 PTP0
W
PWM PWM7 PWM6 PWM5 PWM4 PWM3 PWM2 PWM1 PWM0
SPI SCK2 SS2 MOSI2 MISO2 SS1 SCK1 MOSI1 MISO1
Reset 00000000
Figure 4-40. Port P Data Register (PTP)