mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 137
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mc9s12hz256v2
Manufacturer Part Number
mc9s12hz256v2
Description
Hcs12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12HZ256V2.pdf
(692 pages)
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4.3.3.7
Read: Anytime. Write: Anytime.
This register selects whether a port M 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.
These bits apply also to the CAN transmitter and allow a multipoint connection of several serial modules.
Freescale Semiconductor
WOMM[5:2]
PPSM[5:2]
Reset
Field
Field
5:2
5:2
W
R
Pull Select Port M
0 A pull-up device is connected to the associated port M pin.
1 A pull-down device is connected to the associated port M pin.
Wired-OR Mode Port M
0 Output buffers operate as push-pull outputs.
1 Output buffers operate as open-drain outputs.
Port M Wired-OR Mode Register (WOMM)
0
0
7
= Reserved or Unimplemented
0
0
6
Figure 4-22. Port M Wired-OR Mode Register (WOMM)
Table 4-17. WOMM Field Descriptions
Table 4-16. PPSM Field Descriptions
WOMM5
MC9S12HZ256 Data Sheet, Rev. 2.05
0
5
WOMM4
0
4
Description
Description
WOMM3
0
3
Chapter 4 Port Integration Module (PIM9HZ256V2)
WOMM2
0
2
0
0
1
0
0
0
137
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