Freescale Semiconductor, Inc.
Bus Control and Input/Output
Bit 7
PUPH
1
6
PUPG
1
5
0
0
4
PUPE
1
3
0
0
2
0
0
1
PUPB
0
Bit 0
PUPA
0
RESET:
PUCR — Pull-Up Control Register
$000C
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.
PUPH — Pull-Up or Pull-Down Port H Enable
0 = Port H pull-ups are disabled.
1 = Enable pull-up/down devices for all port H input pins.
PUPG — Pull-Up or Pull-Down Port G Enable
0 = Port G pull-ups are disabled.
1 = Enable pull-up/down devices for all port G input pins.
PUPE — Pull-Up Port E Enable
0 = Port E pull-ups on PE7 and PE[3:0] are disabled.
1 = Enable pull-up devices for port E input pins PE7 and PE[3:0].
PUPB — Pull-Up Port B Enable
0 = Port B pull-ups are disabled.
1 = Enable pull-up devices for all port B input pins.
This bit has no effect if port B is being used as part of the address/data
bus (the pull-ups are inactive).
PUPA — Pull-Up Port A Enable
0 = Port A pull-ups are disabled.
1 = Enable pull-up devices for all port A input pins.
This bit has no effect if port A is being used as part of the address/data
bus (the pull-ups are inactive).
Advance Information
96
68HC(9)12D60 — Rev 4.0
Bus Control and Input/Output
MOTOROLA
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA [ MOTOROLA ]
