MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 149

• Manufacturer Part Number: MC68HC908JK3
• Description: MC68HC908JK1
• Manufacturer: MOTOROLA [Motorola, Inc]

12.4 Port A Data Register (PTA)
MC68H(R)C908JL3
MOTOROLA
Additional Functions:
—
Rev. 1.0
Address:
The port A data register (PTA) contains a data latch for each of the seven
port A pins.
PTA[6:0] — Port A Data Bits
KBI[6:0] — Port A Keyboard Interrupts
Reset:
Read:
Write:
These read/write bits are software programmable. Data direction of
each port A pin is under the control of the corresponding bit in data
direction register A. Reset has no effect on port A data.
The keyboard interrupt enable bits, KBIE6-KBIE0, in the keyboard
interrupt control register (KBAIER) enable the port A pins as external
interrupt pins, (see
$0000
Bit 7
Figure 12-2. Port A Data Register (PTA)
0
30k pull-up 30k pull-up 30k pull-up 30k pull-up 30k pull-up 30k pull-up 30k pull-up
Keyboard
Interrupt
PTA6
6
I/O Ports
Section 14. Keyboard Interrupt Module
Keyboard
Interrupt
(Sink)
PTA5
LED
5
Keyboard
Unaffected by Reset
Interrupt
(Sink)
PTA4
LED
4
Keyboard
Interrupt
(Sink)
PTA3
LED
3
Keyboard
Interrupt
Port A Data Register (PTA)
(Sink)
PTA2
LED
2
Keyboard
Interrupt
(Sink)
PTA1
LED
1
Technical Data
I/O Ports
Keyboard
(KBI)).
Interrupt
(Sink)
PTA0
Bit 0
LED
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