Datasheet

Chapter 2 Port Integration Module (S12XEPIMV1)
MC9S12XE-Family Reference Manual Rev. 1.25
140 Freescale Semiconductor
2.3.48 Port P Reduced Drive Register (RDRP)
2.3.49 Port P Pull Device Enable Register (PERP)
Address 0x025B Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
76543210
R
RDRP7 RDRP6 RDRP5 RDRP4 RDRP3 RDRP2 RDRP1 RDRP0
W
Reset 00000000
Figure 2-46. Port P Reduced Drive Register (RDRP)
Table 2-44. RDRP Register Field Descriptions
Field Description
7-0
RDRP
Port P reduced drive—Select reduced drive for outputs
This register configures the drive strength of output pins 7 through 0 as either full or reduced independent of the
function used on the pins. If a pin is used as input this bit has no effect.
1 Reduced drive selected (approx. 1/5 of the full drive strength).
0 Full drive strength enabled.
Address 0x025C Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
76543210
R
PPSP7 PPSP6 PPSP5 PPSP4 PPSP3 PPSP2 PPSP1 PPSP0
W
Reset 00000000
Figure 2-47. Port P Pull Device Enable Register (PERP)
Table 2-45. PERP Register Field Descriptions
Field Description
7-0
PERP
Port P pull device enable—Enable pull devices on input pins
These bits configure whether a pull device is activated, if the associated pin is used as an input. This bit has no effect
if the pin is used as an output. Out of reset no pull device is enabled.
1 Pull device enabled.
0 Pull device disabled.