Port Integration Module (S12PPIMV1)
2.3.11 Ports A, B, E Reduced Drive Register (RDRIV)
Address 0x000D
Access: User read/write(1)
7
6
5
4
3
2
1
0
R
W
0
0
0
0
0
RDPE
RDPB
RDPA
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 2-9. Ports ABEK Reduced Drive Register (RDRIV)
1. Read: Anytime
Write: Anytime
Table 2-11. RDRIV Register Field Descriptions
Description
Field
4
Port E reduced drive—Select reduced drive for output port
RDPE
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
1
Port B reduced drive—Select reduced drive for output port
RDPE
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
0
Port A reduced drive—Select reduced drive for output port
RDPA
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. 1.13
68
Freescale Semiconductor
FREESCALE [ Freescale ]
