mc9s12q128 Freescale Semiconductor, Inc, mc9s12q128 Datasheet - Page 91
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mc9s12q128
Manufacturer Part Number
mc9s12q128
Description
Hcs12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12Q128.pdf
(644 pages)
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2.3.2.3.6
Read: Anytime.
Write: Anytime.
2.3.2.3.7
Read: Anytime.
Write: Anytime.
Freescale Semiconductor
Module Base + 0x0015
Module Base + 0x0016
WOMM[5:0]
PPSM[5:0]
Reset
Reset
Field
Field
5–0
5–0
W
W
R
R
Polarity Select Port M — This register selects whether a pull-down or a pull-up device is connected to the pin.
0 A pull-up device is connected to the associated port M pin, if enabled by the associated bit in register PERM
1 A pull-down device is connected to the associated port M pin, if enabled by the associated bit in register PERM
Wired-OR Mode Port M — 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 bit has no influence on pins used as inputs.
0 Output buffers operate as push-pull outputs.
1 Output buffers operate as open-drain outputs.
0
0
0
0
7
7
and if the port is used as input or as wired-or output.
and if the port is used as input.
Port M Polarity Select Register (PPSM)
Port M Wired-OR Mode Register (WOMM)
= Unimplemented or Reserved
= Unimplemented or Reserved
0
0
0
0
6
6
Figure 2-23. Port M Wired-OR Mode Register (WOMM)
Figure 2-22. Port M Polarity Select Register (PPSM)
Table 2-21. WOMM Field Descriptions
Table 2-20. PPSM Field Descriptions
WOMM5
PPSM5
0
0
5
5
MC9S12Q128
WOMM4
PPSM4
Rev 1.09
0
0
4
4
Description
Description
Chapter 2 Port Integration Module (PIM9C32) Block Description
WOMM3
PPSM3
0
0
3
3
WOMM2
PPSM2
0
0
2
2
WOMM1
PPSM1
0
0
1
1
WOMM0
PPSM0
0
0
0
0
91
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