mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 146
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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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Chapter 4 Port Integration Module (PIM9HZ256V2)
4.3.5.5
Read: Anytime. Write: Anytime.
This register configures whether a pull-up or a pull-down device is activated on configured input or
wired-or (open drain) output pins. If a pin is configured as push-pull output, the corresponding Pull Device
Enable Register bit has no effect.
4.3.5.6
Read: Anytime. Write: Anytime.
The Port S Polarity Select Register selects whether a pull-down or a pull-up device is connected to the pin.
The Port S Polarity Select Register is effective only when the corresponding Data Direction Register bit
is set to 0 (input) and the corresponding Pull Device Enable Register bit is set to 1.
146
PERS[7:4]
PERS[1:0]
Reset
Reset
Field
7:4
1:0
W
W
R
R
PERS7
PPSS7
Pull Device Enable Port S
0 Pull-up or pull-down device is disabled.
1 Pull-up or pull-down device is enabled.
Pull Device Enable Port S
0 Pull-up or pull-down device is disabled.
1 Pull-up or pull-down device is enabled.
Port S Pull Device Enable Register (PERS)
Port S Polarity Select Register (PPSS)
0
0
7
7
= Reserved or Unimplemented
= Reserved or Unimplemented
PERS6
PPSS6
Figure 4-34. Port S Pull Device Enable Register (PERS)
0
0
6
6
Figure 4-35. Port S Polarity Select Register (PPSS)
Table 4-25. PERS Field Descriptions
PERS5
PPSS5
MC9S12HZ256 Data Sheet, Rev. 2.05
0
0
5
5
PERS4
PPSS4
0
0
4
4
Description
0
0
0
0
3
3
0
0
0
0
2
2
PERS1
PPSS1
Freescale Semiconductor
0
0
1
1
PERS0
PPSS0
0
0
0
0
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