Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
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. 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.
7
6
5
4
3
2
1
0
R
PERR7
PERR6
PERR5
PERR4
PERR3
PERR2
PERR1
PERR0
W
Reset
0
0
0
0
0
0
0
0
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.
7
6
5
4
3
2
1
0
R
PPSR7
PPSR6
PPSR5
PPSR4
PPSR3
PPSR2
PPSR1
PPSR0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-88. Port R Polarity Select Register (PPSR)
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages