Port D; Port D Data Register - Motorola MC68HC908GP32 Technical Data Manual

Input/Output (I/O) Ports

16.6 Port D

16.6.1 Port D Data Register

NOTE:
Technical Data
226
Freescale Semiconductor, Inc.
Port D is an 8-bit special-function port that shares four of its pins with the
serial peripheral interface (SPI) module and four of its pins with two timer
interface (TIM1 and TIM2) modules. Port D also has software
configurable pullup devices if configured as an input port.
The port D data register (PTD) contains a data latch for each of the eight
port D pins.
Bit 7 and bit 6 of PTD are not available in a 40-pin dual in-line
package.
Address: $0003
Bit 7 6
Read:
PTD7 PTD6
Write:
Reset:
Alternate
T2CH1 T2CH0
Function:
Figure 16-13. Port D Data Register (PTD)
PTD7–PTD0 — Port D Data Bits
These read/write bits are software-programmable. Data direction of
each port D pin is under the control of the corresponding bit in data
direction register D. Reset has no effect on port D data.
T2CH1 and T2CH0 — Timer 2 Channel I/O Bits
The PTD7/T2CH1–PTD6/T2CH0 pins are the TIM2 input
capture/output compare pins. The edge/level select bits,
ELSxB:ELSxA, determine whether the PTD7/T2CH1–PTD6/T2CH0
pins are timer channel I/O pins or general-purpose I/O pins.
Section 22. Timer Interface Module
Input/Output (I/O) Ports
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5 4 3
PTD5 PTD4 PTD3
Unaffected by reset
T1CH1 T1CH0 SPSCK
(TIM).
MC68HC908GP32
2 1 Bit 0
PTD2 PTD1 PTD0
MOSI MISO SS
See
MC68HC08GP32 Rev. 6
• —
MOTOROLA