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 congures 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 congure 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)
