mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 136
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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)
4.3.3.5
Read: Anytime. Write: Anytime.
This register configures whether a pull-up or a pull-down device is activated on configured input or
wired-or output pins. If a pin is configured as push-pull output, the corresponding Pull Device Enable
Register bit has no effect.
4.3.3.6
Read: Anytime. Write: Anytime.
The Port M Polarity Select Register selects whether a pull-down or a pull-up device is connected to the
pin. The Port M 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.
If a CAN module is enabled, a pull-up device can be activated on the receiver pin, and on the transmitter
pin if the corresponding wired-OR mode bit is set. Pull-down devices can not be activated on CAN pins.
136
PERM[5:2]
Reset
Reset
Field
5:2
W
W
R
R
Pull Device Enable Port M
0 Pull-up or pull-down device is disabled.
1 Pull-up or pull-down device is enabled.
Port M Pull Device Enable Register (PERM)
Port M Polarity Select Register (PPSM)
0
0
0
0
7
7
= Reserved or Unimplemented
= Reserved or Unimplemented
Figure 4-20. Port M Pull Device Enable Register (PERM)
0
0
0
0
6
6
Figure 4-21. Port M Polarity Select Register (PPSM)
Table 4-15. PERM Field Descriptions
PERM5
PPSM5
MC9S12HZ256 Data Sheet, Rev. 2.05
0
0
5
5
PERM4
PPSM4
0
0
4
4
Description
PERM3
PPSM3
0
0
3
3
PERM2
PPSM2
0
0
2
2
Freescale Semiconductor
0
0
0
0
1
1
0
0
0
0
0
0
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