mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 147

• Manufacturer Part Number: mc9s12hz256v2
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

4.3.5.7
Read: Anytime. Write: Anytime.
This register selects whether a port S output is configured as push-pull or wired-or. When a Wired-OR
Mode Register bit is set to 1, the corresponding output pin is driven active low only (open drain) and a
high level is not driven. A Wired-OR Mode Register bit has no effect if the corresponding pin is configured
as an input.
Freescale Semiconductor
WOMS[7:4]
WOMS[1:0]
PPSS[7:4]
PPSS[1:0]
Reset
Field
Field
7:4
1:0
7:4
1:0
W
R
WOMS7
Pull Select Port S
0 A pull-up device is connected to the associated port S pin.
1 A pull-down device is connected to the associated port S pin.
Pull Select Port S
0 A pull-up device is connected to the associated port S pin.
1 A pull-down device is connected to the associated port S pin.
Wired-OR Mode Port S
0 Output buffers operate as push-pull outputs.
1 Output buffers operate as open-drain outputs.
Wired-OR Mode Port S
0 Output buffers operate as push-pull outputs.
1 Output buffers operate as open-drain outputs.
Port S Wired-OR Mode Register (WOMS)
0
7
= Reserved or Unimplemented
WOMS6
0
6
Figure 4-36. Port S Wired-OR Mode Register (WOMS)
Table 4-27. WOMS Field Descriptions
Table 4-26. PPSS Field Descriptions
WOMS5
MC9S12HZ256 Data Sheet, Rev. 2.05
0
5
WOMS4
0
4
Description
Description
0
0
3
Chapter 4 Port Integration Module (PIM9HZ256V2)
0
0
2
WOMS1
0
1
WOMS0
0
0
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