Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
128
Freescale Semiconductor
2.3.33
Port S Pull Device Enable Register (PERS)
2.3.34
Port S Polarity Select Register (PPSS)
Address 0x024C
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PERS7
PERS6
PERS5
PERS4
PERS3
PERS2
PERS1
PERS0
W
Reset
1
1
1
1
1
1
1
1
Figure 2-31. Port S Pull Device Enable Register (PERS)
Table 2-30. PERS Register Field Descriptions
Field
Description
7-0
PERS
Port S 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 all pull devices are enabled.
1 Pull device enabled.
0 Pull device disabled.
Address 0x024D
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PPSS7
PPSS6
PPSS5
PPSS4
PPSS3
PPSS2
PPSS1
PPSS0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-32. Port S Polarity Select Register (PPSS)
Table 2-31. PPSS Register Field Descriptions
Field
Description
7-0
PPSS
Port S pull device select
—Determine pull device polarity on input pins
This register selects whether a pull-down or a pull-up device is connected to the pin.
1 A pull-down device is connected to the associated pin, if enabled and if the pin is used as input.
0 A pull-up device is connected to the associated pin, if enabled and if the pin is used as input.
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