mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 997

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Reset
RDPK
RDPE
RDPB
RDPA
24.0.5.8
1. Register implemented, function disabled: Written values can be read back.
Read: Anytime.
Write: Anytime.
This register is used to select reduced drive for the pins associated with ports A, B, E, and K. If
enabled, the pins drive at about 1/6 of the full drive strength. The reduced drive function is
independent of which function is being used on a particular pin.
The reduced drive functionality does not take effect on the pins in emulation modes.
Field
7
4
1
0
W
R
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.
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.
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.
Reduced Drive of Ports A
0 All Port A output pins have full drive enabled.
1 All port A output pins have reduced drive enabled.
7
0
S12X_EBI Ports Reduced Drive Register (RDRIV)
= Unimplemented or Reserved
Figure 24-10. S12X_EBI Ports Reduced Drive Register (RDRIV)
0
0
6
Table 24-11. RDRIV Field Descriptions
5
0
0
RDPE
0
4
Description
RDPD
3
0
1
RDPC
0
2
1
RDPB
1
0
RDPA
0
0