MC912DG128ACPVE Datasheet, PDF (113/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Freescale Semiconductor, Inc.
Bus Control and Input/Output
Registers
RDRIV — Reduced Drive of I/O Lines
$000D
Bit 7
6
5
4
3
RDPK
RDPJ
RDPH
RDPE
0
RESET:
0
0
0
0
0
2
1
Bit 0
0
RDPB
RDPA
0
0
0
These bits select reduced drive for the associated port pins. This
gives reduced power consumption and reduced RFI with a slight
increase in transition time (depending on loading). The reduced drive
function is independent of which function is being used on a particular
port.
This register is not in the map in peripheral mode.
Normal: write once; Special: write anytime EXCEPT the first time.
Read anytime.
RDPK — Reduced Drive of Port K
0 = All port K output pins have full drive enabled.
1 = All port K output pins have reduced drive capability.
RDPJ — Reduced Drive of Port J
0 = All port J output pins have full drive enabled.
1 = All port J output pins have reduced drive capability.
RDPH — Reduced Drive of Port H
0 = All port H output pins have full drive enabled.
1 = All port H output pins have reduced drive capability.
RDPE — Reduced Drive of Port E
0 = All port E output pins have full drive enabled.
1 = All port E output pins have reduced drive capability.
RDPB — Reduced Drive of Port B
0 = All port B output pins have full drive enabled.
1 = All port B output pins have reduced drive capability.
RDPA — Reduced Drive of Port A
0 = All port A output pins have full drive enabled.
1 = All port A output pins have reduced drive capability.
MC68HC912DT128A — Rev 4.0
MOTOROLA
Bus Control and Input/Output
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Technical Data
113