mc9s12q128 Freescale Semiconductor, Inc, mc9s12q128 Datasheet - Page 87

• Manufacturer Part Number: mc9s12q128
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

2.3.2.2.6
Read: Anytime.
Write: Anytime.
2.3.2.2.7
Read: Anytime.
Write: Anytime.
Freescale Semiconductor
Module Base + 0x000D
Module Base + 0x000E
WOMS[3:0]
PPSS[3:0]
Reset
Reset
Field
Field
3–0
3–0
W
W
R
R
Pull Select Port S — 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 S pin, if enabled by the associated bit in register PERS
1 A pull-down device is connected to the associated port S pin, if enabled by the associated bit in register PERS
Wired-OR Mode Port S — 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 S Polarity Select Register (PPSS)
Port S Wired-OR Mode Register (WOMS)
= Unimplemented or Reserved
= Unimplemented or Reserved
0
0
0
0
6
6
Figure 2-16. Port S Wired-Or Mode Register (WOMS)
Figure 2-15. Port S Polarity Select Register (PPSS)
Table 2-15. WOMS Field Descriptions
Table 2-14. PPSS Field Descriptions
0
0
0
0
5
5
MC9S12Q128
Rev 1.09
0
0
0
0
4
4
Description
Description
Chapter 2 Port Integration Module (PIM9C32) Block Description
WOMS3
PPSS3
0
0
3
3
WOMS2
PPSS2
0
0
2
2
WOMS1
PPSS1
0
0
1
1
WOMS0
PPSS0
0
0
0
0
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