M68SDIL datasheet(94/460 Pages) MOTOROLA

94 / 460 page

Bus Control and Input/Output

Technical Data

MC68HC912D60A — Rev 3.0

Bus Control and Input/Output

MOTOROLA

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).

Bit 7

Bit 0

PUPH

PUPG

PUPE

PUPB

PUPA

RESET:

PUCR — Pull-Up Control Register

$000C

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

M68SDIL Datasheet(PDF) 94 Page - Motorola, Inc