Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
150
Freescale Semiconductor
2.3.62
Port J Input Register (PTIJ)
2.3.63
Port J Data Direction Register (DDRJ)
1
PTJ
Port J general purpose input/output data
—Data Register
This pin is associated with the TXD signal of SCI2
.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
0
PTJ
Port J general purpose input/output data
—Data Register
This pin is associated with the TXD signal of SCI2 and chip select output CS3. The SCI function takes precedence
over the chip select and general purpose I/O function if the SCI2 is enabled. The chip select takes precedence over
the general purpose I/O.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
Address 0x0269
Access: User read
(1)
1. Read: Anytime.
Write:Never, writes to this register have no effect.
7
6
5
4
3
2
1
0
R
PTIJ7
PTIJ6
PTIJ5
PTIJ4
PTIJ3
PTIJ2
PTIJ1
PTIJ0
W
Reset
u
u
u
u
u
u
u
u
= Unimplemented or Reserved
u = Unaffected by reset
Figure 2-60. Port J Input Register (PTIJ)
Table 2-58. PTIJ Register Field Descriptions
Field
Description
7-0
PTIJ
Port J input data
—
This register always reads back the buffered state of the associated pins. This can also be used to detect overload
or short circuit conditions on output pins.
Address 0x026A
Access: User read/write
(1)
7
6
5
4
3
2
1
0
R
DDRJ7
DDRJ6
DDRJ5
DDRJ4
DDRJ3
DDRJ2
DDRJ1
DDRJ0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-61. Port J Data Direction Register (DDRJ)
Table 2-57. PTJ Register Field Descriptions (continued)
Field
Description
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
