MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 223

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

13.3.3 Port A Input Pull-Up Enable Registers
MC68HC908JL8
MOTOROLA
—
Rev. 2.0
Address:
Address:
The port A input pull-up enable registers contain a software configurable
pull-up device for each of the eight port A pins. Each bit is individually
configurable and requires the corresponding data direction register,
DDRAx be configured as input. Each pull-up device is automatically
disabled when its corresponding DDRAx bit is configured as output.
PTA6EN — Enable PTA6 on OSC2
PTAPUE[7:0] — Port A Input Pull-up Enable Bits
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 13-6. PTA7 Input Pull-up Enable Register (PTA7PUE)
This read/write bit configures the OSC2 pin function when RC
oscillator option is selected. This bit has no effect for XTAL oscillator
option.
These read/write bits are software programmable to enable pull-up
devices on port A pins.
Freescale Semiconductor, Inc.
Figure 13-5. Port A Input Pull-up Enable Register (PTAPUE)
For More Information On This Product,
1 = OSC2 pin configured for PTA6 I/O, and has all the interrupt and
0 = OSC2 pin outputs the RC oscillator clock (RCCLK)
1 = Corresponding port A pin configured to have internal pull-up if
0 = Pull-up device is disconnected on the corresponding port A pin
PTAPUE7
PTA6EN PTAPUE6 PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
$000D
$000E
Bit 7
Bit 7
pull-up functions
its DDRA bit is set to 0
regardless of the state of its DDRA bit
0
0
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Input/Output (I/O) Ports
6
0
6
0
5
0
5
0
4
0
4
0
3
0
3
0
2
0
2
0
Input/Output (I/O) Ports
1
0
1
0
Technical Data
Bit 0
Bit 0
Port A
0
0
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