Datasheet

Chapter 2 Port Integration Module (S12XEPIMV1)
MC9S12XE-Family Reference Manual Rev. 1.25
166 Freescale Semiconductor
2.3.89 Port R Pull Device Enable Register (PERR)
2.3.90 Port R Polarity Select Register (PPSR)
Table 2-84. RDRR Register Field Descriptions
Field Description
7-0
RDRR
Port R 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 0x036C Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
76543210
R
PERR7 PERR6 PERR5 PERR4 PERR3 PERR2 PERR1 PERR0
W
Reset 00000000
Figure 2-87. Port R Pull Device Enable Register (PERR)
Table 2-85. PERR Register Field Descriptions
Field Description
7-0
PERR
Port R 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.
Address 0x036D Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
76543210
R
PPSR7 PPSR6 PPSR5 PPSR4 PPSR3 PPSR2 PPSR1 PPSR0
W
Reset 00000000
Figure 2-88. Port R Polarity Select Register (PPSR)