MC9S12T64 Datasheet, PDF (156/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Multiplexed External Bus Interface (MEBI)
Pull-Up Control
Register (PUCR)
Address Offset: $000C
Bit 7
Read:
PUPKE
Write:
Reset:
1
6
5
4
3
2
1
Bit 0
0
0
0
0
PUPEE
PUPBE PUPAE
0
0
1
0
0
0
0
= Unimplemented or reserved
Read and write: anytime (provided this register is in the map).
This register is used to select pullup resistors for the pins associated
with the A, B, E, K ports. Pullups are assigned on a per-port basis and
apply to any pin in the corresponding port that is currently configured
as an input.
This register is not in the on-chip map in emulation and peripheral
modes.
PUPKE — Pull-Up Port K Enable
1 = Enable pull-up devices for port K input pins.
0 = Port K pull-ups are disabled.
PUPEE — Pull-Up Port E Enable
1 = Enable pull-up devices for port E input pin bits 7, 4–0.
0 = Port E pull-ups on bit 7, 4–0 are disabled.
PUPBE — Pull-Up Port B Enable
1 = Enable pull-up devices for all port B input pins.
0 = Port B pull-ups are disabled.
PUPAE — Pull-Up Port A Enable
1 = Enable pull-up devices for all port A input pins.
0 = Port A pull-ups are disabled.
MC9S12T64Revision 1.1.1
Multiplexed External Bus Interface (MEBI)
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