MC9S12P128 Datasheet, PDF (68/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12PPIMV1)
2.3.11 Ports A, B, E Reduced Drive Register (RDRIV)
Address 0x000D
7
R
0
W
Reset
0
1. Read: Anytime
Write: Anytime
Access: User read/write⁽¹⁾
6
5
4
3
2
1
0
0
0
0
0
RDPE
RDPB
RDPA
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 2-9. Ports ABEK Reduced Drive Register (RDRIV)
Table 2-11. RDRIV Register Field Descriptions
Field
4
RDPE
Description
Port E reduced drive—Select reduced drive for output port
This bit configures the drive strength of all associated port output pins as either full or reduced. If a pin is used as
input this bit has no effect. The reduced drive function is independent of which function is being used on a particular
pin.
1
RDPE
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
Port B reduced drive—Select reduced drive for output port
This bit configures the drive strength of all associated port output pins as either full or reduced. If a pin is used as
input this bit has no effect. The reduced drive function is independent of which function is being used on a particular
pin.
0
RDPA
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
Port A reduced drive—Select reduced drive for output port
This bit configures the drive strength of all associated port output pins as either full or reduced. If a pin is used as
input this bit has no effect. The reduced drive function is independent of which function is being used on a particular
pin.
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
S12P-Family Reference Manual, Rev. 1.12
68
Freescale Semiconductor