MC68HC908JK3EMP MOTOROLA [Motorola, Inc], MC68HC908JK3EMP Datasheet - Page 156

• Manufacturer Part Number: MC68HC908JK3EMP
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Input/Output (I/O) Ports
12.3 Port A
12.3.1 Port A Data Register (PTA)
Technical Data
156
NOTE:
Additional Functions:
Address:
Port A is an 7-bit special function port that shares all seven of its pins
with the keyboard interrupt (KBI) module (see
Interrupt Module
pull-up device if the corresponding port pin is configured as input port.
PTA0 to PTA5 has direct LED drive capability.
PTA0–PTA5 pins are available on MC68H(R)C908JL3E only.
PTA6 pin is available on MC68HRC908JL3E/JK3E/JK1E only.
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, KBIE[6:0], in the keyboard
interrupt control register (KBIER) enable the port A pins as external
interrupt pins, (see
$0000
Bit 7
Figure 12-2. Port A Data Register (PTA)
0
Input/Output (I/O) Ports
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
(KBI)). Each port A pin also has software configurable
Section 14. Keyboard Interrupt Module
Keyboard
Interrupt
(Sink)
PTA5
LED
5
Keyboard
Unaffected by Reset
Interrupt
(Sink)
PTA4
LED
4
MC68H(R)C908JL3E/JK3E/JK1E
Keyboard
Interrupt
(Sink)
PTA3
LED
3
Section 14. Keyboard
Keyboard
Interrupt
(Sink)
PTA2
LED
2
Keyboard
Interrupt
(Sink)
PTA1
LED
1
MOTOROLA
—
Keyboard
(KBI)).
Interrupt
Rev. 2.0
(Sink)
PTA0
Bit 0
LED