Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
153
2.3.65
Port J Pull Device Enable Register (PERJ)
2.3.66
Port J Polarity Select Register (PPSJ)
Address 0x026C
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PERJ7
PERJ6
PERJ5
PERJ4
PERJ3
PERJ2
PERJ1
PERJ0
W
Reset
1
1
1
1
1
1
1
1
Figure 2-63. Port J Pull Device Enable Register (PERJ)
Table 2-61. PERJ Register Field Descriptions
Field
Description
7-0
PERJ
Port J 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 device are enabled.
1 Pull device enabled.
0 Pull device disabled.
Address 0x026D
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PPSJ7
PPSJ6
PPSJ5
PPSJ4
PPSJ3
PPSJ2
PPSJ1
PPSJ0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-64. Port J Polarity Select Register (PPSJ)
Table 2-62. PPSJ Register Field Descriptions
Field
Description
7-0
PPSJ
Port J pull device select
—Determine pull device polarity on input pins
This register serves a dual purpose by selecting the polarity of the active interrupt edge as well as selecting a pull-
up or pull-down device if enabled.
1 A rising edge on the associated Port J pin sets the associated flag bit in the PIFJ register. A pull-down device is
connected to the associated Port J pin, if enabled by the associated bit in register PERJ and if the port is used as
input.
0 A falling edge on the associated Port J pin sets the associated flag bit in the PIFJ register.A pull-up device is
connected to the associated Port J pin, if enabled by the associated bit in register PERJ and if the port 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