MC68HC08AZ32A Datasheet, PDF (318/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

I/O Ports
Freescale Semiconductor, Inc.
19.10 Port H
Port H is a 2-bit special function port that shares all of its pins with the
Keyboard Interrupt Module (KBD).
19.10.1 Port H Data Register (PTH)
The port H data register contains a data latch for each of the two port H
pins.
Bit 7
6
5
4
3
2
Read: 0
0
0
0
0
0
PTH $000B
Write: R
R
R
R
R
R
Reset:
Unaffected by reset
Alternate Function
R = Reserved
Figure 19-22. Port H Data Register (PTH)
1
Bit 0
PTH1 PTH0
KBD4 KBD3
PTH[1:0] — Port H Data Bits
These read/write bits are software-programmable. Data direction of
each port H pin is under the control of the corresponding bit in data
direction register H. Reset has no effect on port G data.
KBD[4:3] — Keyboard Wakeup Pins
The keyboard interrupt enable bits, KBIE[4:3], in the keyboard
interrupt control register (KBICR), enable the port H pins as external
interrupt pins. See Keyboard Module (KBD) on page 373.
Technical Data
318
MC68HC08AZ32A — Rev 1.0
I/O Ports
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