Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
178
Freescale Semiconductor
This register configures the re-routing of SCI3, IIC0, CS[3:0] on alternative ports.
2.4
Functional Description
2.4.1
General
Each pin except PE0, PE1, and BKGD can act as general purpose I/O. In addition each pin can act as an
output from the external bus interface module or a peripheral module or an input to the external bus
interface module or a peripheral module.
2.4.2
Registers
A set of configuration registers is common to all ports with exceptions in the expanded bus interface and
ATD ports (
). All registers can be written at any time, however a specific configuration might
not become active.
Example 2-1. Selecting a pull-up device
This device does not become active while the port is used as a push-pull output.
Table 2-102. Port F Routing Summary
Module
PTFRR
Related Pins
5
4
3
2
1
0
TXD
RXD
SCI3
0
x
x
x
x
x
PM7
PM6
1
x
x
x
x
x
PF7
PF6
SCL
SDA
IIC0
x
0
x
x
x
x
PJ7
PJ6
x
1
x
x
x
x
PF5
PF4
CS
CS3
x
x
0
x
x
x
PJ0
x
x
1
x
x
x
PF3
CS2
x
x
x
0
x
x
PJ5
x
x
x
1
x
x
PF2
CS1
x
x
x
x
0
x
PJ2
x
x
x
x
1
x
PF1
CS0
x
x
x
x
x
0
PJ4
x
x
x
x
x
1
PF0
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of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
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available
from
Freescale
for
import
or
sale
in
the
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States
prior
to
September
2010:
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products
in
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MAPBGA
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