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MC9S12C128MFA Datasheet(PDF) 92 Page - Freescale Semiconductor, Inc

Part # MC9S12C128MFA
Description  Microcontrollers
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC9S12C128MFA Datasheet(HTML) 92 Page - Freescale Semiconductor, Inc

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Chapter 2 Port Integration Module (PIM9C32) Block Description
92
MC9S12C-Family / MC9S12GC-Family
Freescale Semiconductor
Rev 01.23
2.3.2.3.6
Port M Polarity Select Register (PPSM)
Read: Anytime.
Write: Anytime.
2.3.2.3.7
Port M Wired-OR Mode Register (WOMM)
Read: Anytime.
Write: Anytime.
Module Base + 0x0015
76543210
R0
0
PPSM5
PPSM4
PPSM3
PPSM2
PPSM1
PPSM0
W
Reset
0
0
0
00000
= Unimplemented or Reserved
Figure 2-22. Port M Polarity Select Register (PPSM)
Table 2-20. PPSM Field Descriptions
Field
Description
5–0
PPSM[5:0]
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
and if the port is used as input or as wired-or output.
1 A pull-down device is connected to the associated port M pin, if enabled by the associated bit in register PERM
and if the port is used as input.
Module Base + 0x0016
76543210
R0
0
WOMM5
WOMM4
WOMM3
WOMM2
WOMM1
WOMM0
W
Reset
0
0
0
00000
= Unimplemented or Reserved
Figure 2-23. Port M Wired-OR Mode Register (WOMM)
Table 2-21. WOMM Field Descriptions
Field
Description
5–0
WOMM[5:0]
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.


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