XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 376

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Input/Output Ports
22.10 Port H
22.10.1 Port H Data Register
Technical Data
376
Function:
Alternate
Address:
Port H is a 2-bit special function port that shares all of its pins with the
keyboard interrupt module (KBD). Note that Port H is only available on
64-pin package options.
The port H data register contains a data latch for each of the two port H
pins.
PTH[1:0] — Port H Data Bits
KBD[4:3] — Keyboard Wake-up pins
Reset:
Read:
Write:
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 PTH[1:0].
The keyboard interrupt enable bits, KBIE[4:3], in the keyboard
interrupt control register, enable the port H pins as external interrupt
pins (See
$000B
Bit 7
R
R
0
Figure 22-23. Port H Data Register (PTH)
Keyboard Module (KBD)
= Reserved
Input/Output Ports
R
6
0
R
5
0
Unaffected by Reset
R
4
0
on page 431).
R
3
0
MC68HC908AZ60A — Rev 2.0
R
2
0
PTH1
KBD4
1
MOTOROLA
PTH0
KBD3
Bit 0