Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
129
2.3.35
Port S Wired-Or Mode Register (WOMS)
2.3.36
PIM Reserved Register
Address 0x024E
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
WOMS7
WOMS6
WOMS5
WOMS4
WOMS3
WOMS2
WOMS1
WOMS0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-33. Port S Wired-Or Mode Register (WOMS)
Table 2-32. WOMS Register Field Descriptions
Field
Description
7-0
WOMS
Port S wired-or mode
—Enable wired-or functionality
This register configures the output pins as wired-or. If enabled the output is driven active low only (open-drain). A
logic level of “1” is not driven.This allows a multipoint connection of several serial modules. These bits have no
influence on pins used as inputs.
1 Output buffers operate as open-drain outputs.
0 Output buffers operate as push-pull outputs.
Address 0x024F
Access: User read
(1)
1. Read: Always reads 0x00
Write: Unimplemented
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
u = Unaffected by reset
Figure 2-34. PIM Reserved Register
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