MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 163

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

12.3.1 Port A Data Register
MOTOROLA
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
Additional Functions:
Address: $0000
logic level on the PTA2 pin. When the IRQ function is disabled, these
instructions will behave as if the PTA2 pin is a logic 1. However, reading
bit 2 of PTA will read the actual logic level on the pin.
The port A data register (PTA) contains a data latch for each of the six
port A pins.
PTA[5:0] — Port A Data Bits
AWUL — Auto Wake-up Latch Data Bit
KBI[5:0] — 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.
This is a read-only bit which has the value of the auto wake-up
interrupt request latch. The wake-up request signal is generated
internally (see
PTA6 port nor any of the associated bits such as PTA6 data register,
pullup enable or direction.
The keyboard interrupt enable bits, KBIE5–KBIE0, in the keyboard
interrupt control enable register (KBIER) enable the port A pins as
external interrupt pins (see
(KBI)).
Bit 7
Figure 12-2. Port A Data Register (PTA)
0
Input/Output (I/O) Ports
= Unimplemented
AWUL
14.4.4 Auto Wake-up Interrupt
6
PTA5
KBI5
5
Section 14. Keyboard Interrupt Module
Unaffected by reset
PTA4
KBI4
4
PTA3
KBI3
3
PTA2
Request). There is no
KBI2
2
Input/Output (I/O) Ports
PTA1
KBI1
1
PTA0
KBI0
Bit 0
Port A
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