Datasheet

Bus Control and Input/Output
MC9S12DP256 — Revision 1.1
Bus Control and Input/Output
This register is used to select reduced drive for the pins associated
with the A, B, E, K ports. This gives reduced power consumption and
reduced RFI with a slight increase in transition time (depending on
loading). This feature would be used on ports which have a light
loading. The reduced drive function is independent of which function
is being used on a particular port.
This register is not in the on-chip map in emulation and peripheral
modes.
Read and write: anytime (provided this register is in the map).
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 enabled.
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 enabled.
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 enabled.
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 enabled.
RDRIV — Reduced Drive of I/O Lines
Address Offset: $000D
Bit 7 654321Bit 0
RDPK 0 0 RDPE 0 0 RDPB RDPA
Reset: 00000000
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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