MC912DG128A Motorola, MC912DG128A Datasheet - Page 91

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

PUCR — Pull-Up Control Register
9-bus
MOTOROLA
RESET:
PUPK
Bit 7
0
PUPJ
6
0
PUPK — Pull-Up Port K Enable
PUPJ — Pull-Up or Pull-Down Port J Enable
PUPH — Pull-Up or Pull-Down Port H Enable
PUPE — Pull-Up Port E Enable
PUPB — Pull-Up Port B Enable
PUPA — Pull-Up Port A Enable
These bits select pull-up resistors for any pin in the corresponding
port that is currently configured as an input. This register is not in the
map in peripheral mode.
Read and write anytime.
When this bit is set port E input pins 7, 3, 2, 1 & 0 have an active
pull-up device.
0 = Port K pull-ups are disabled.
1 = Enable pull-up devices for all port K input pins.
0 = Port J resistive loads (pull-ups or pull-downs) are disabled.
1 = Enable resistive load devices (pull-ups or pull-downs) for all
0 = Port H resistive loads (pull-ups or pull-downs) are disabled.
1 = Enable resistive load devices (pull-ups or pull-downs) for all
0 = Port E pull-ups on PE7, PE3, PE2, PE1 and PE0 are disabled.
1 = Enable pull-up devices for port E input pins PE7, PE3, PE2,
0 = Port B pull-ups are disabled.
1 = Enable pull-up devices for all port B input pins.
0 = Port A pull-ups are disabled.
1 = Enable pull-up devices for all port A input pins.
PUPH
5
0
port J input pins.
port H input pins.
PE1 and PE0.
Bus Control and Input/Output
PUPE
4
1
3
0
0
2
0
0
PUPB
MC68HC912DT128A Rev 2.0
Bus Control and Input/Output
1
0
PUPA
Bit 0
0
Registers
$000C
91