MC912DG128A Motorola, MC912DG128A Datasheet - Page 92

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

RDRIV — Reduced Drive of I/O Lines
Bus Control and Input/Output
MC68HC912DT128A Rev 2.0
92
RESET:
RDPK
Bit 7
0
RDPJ
6
0
RDPK — Reduced Drive of Port K
RDPJ — Reduced Drive of Port J
RDPH — Reduced Drive of Port H
RDPE — Reduced Drive of Port E
RDPB — Reduced Drive of Port B
RDPA — Reduced Drive of Port A
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.
0 = All port K output pins have full drive enabled.
1 = All port K output pins have reduced drive capability.
0 = All port J output pins have full drive enabled.
1 = All port J output pins have reduced drive capability.
0 = All port H output pins have full drive enabled.
1 = All port H output pins have reduced drive capability.
0 = All port E output pins have full drive enabled.
1 = All port E output pins have reduced drive capability.
0 = All port B output pins have full drive enabled.
1 = All port B output pins have reduced drive capability.
0 = All port A output pins have full drive enabled.
1 = All port A output pins have reduced drive capability.
RDPH
5
0
Bus Control and Input/Output
RDPE
4
0
3
0
0
2
0
0
RDPB
1
0
RDPA
Bit 0
0
MOTOROLA
$000D
10-bus