S9S12XS256J0CAL Datasheet, PDF (80/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

Port Integration Module (S12XSPIMV1)
Table 2-10. PUCR Register Field Descriptions (continued)
Field
Description
1
PUPBE
Port B Pull-up Enable—Enable pull-up devices on all port input pins
This bit configures whether a pull-up device is activated on all associated port input pins. If a pin is used as output
this bit has no effect.
0
PUPAE
1 Pull-up device enabled
0 Pull-up device disabled
Port A Pull-up Enable—Enable pull-up devices on all port input pins
This bit configures whether a pull-up device is activated on all associated port input pins. If a pin is used as output
this bit has no effect.
1 Pull-up device enabled
0 Pull-up device disabled
2.3.11 Ports ABEK Reduced Drive Register (RDRIV)
Address 0x000D (PRR)
7
6
5
4
3
2
R
0
0
0
0
RDPK
RDPE
W
Reset
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 2-9. Ports ABEK Reduced Drive Register (RDRIV)
1 _{Read: Anytime, the data source depends on the data direction value}
Write: Anytime
Access: User read/write¹
1
0
RDPB
RDPA
0
0
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 approx. 1/5 of the full drive strength.
Table 2-11. RDRIV Register Field Descriptions
Field
7
RDPK
Description
Port K 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.
4
RDPE
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
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 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
S12XS Family Reference Manual, Rev. 1.13
80
Freescale Semiconductor