mc68hc912bc32 Freescale Semiconductor, Inc, mc68hc912bc32 Datasheet - Page 92

• Manufacturer Part Number: mc68hc912bc32
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Bus Control and Input/Output (I/O)
6.3.9 Reduced Drive of I/O Lines
Read: Anytime, if register is in the map
Write: Once in normal modes; anytime, except the first time, in special modes
These bits select reduced drive for the associated port pins. This gives reduced power consumption and
reduced radio frequency interference (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.
RDPE — Reduced Drive of Port E Bit
RDPB — Reduced Drive of Port B Bit
RDPA — Reduced Drive of Port A Bit
92
1 = Reduced drive for all port E output pins
0 = Full drive for all port E output pins
1 = Reduced drive for all port B output pins
0 = Full drive for all port B output pins
1 = Reduced drive for all port A output pins
0 = Full drive for all port A output pins
Address: $000D
Reset:
Read:
Write:
Bit 7
0
0
Figure 6-9. Reduced Drive of I/O Lines (RDRIV)
= Unimplemented
6
0
0
M68HC12B Family Data Sheet, Rev. 9.1
5
0
0
4
0
0
RDPE
3
0
2
0
0
RDPB
1
0
Freescale Semiconductor
RDPA
Bit 0
0