MC9S12T64 Datasheet, PDF (262/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Port Integration Module (PIM)
Port S Pull Device
Enable Register
(PERS)
Address Offset: $00EC
Bit 7
Read:
PERS7
Write:
Reset: 1
6
5
4
PERS6 PERS5 PERS4
1
1
1
= Reserved or unimplemented
3
PERS3
1
2
PERS2
1
1
PERS1
1
Bit 0
PERS0
1
Read: Anytime.
Write: Anytime.
This register configures whether a pull-up or a pull-down device is
activated, if the port is used as input or as output in wired-or (open drain)
mode. This bit has no effect if the port is used as push-pull output. Out
of reset a pull-up device is enabled.
PERS[7:0] — Pull Device Enable Port S
1 = Either a pull-up or pull-down device is enabled.
0 = Pull-up or pull-down device is disabled.
Port S Polarity
Select Register
(PPSS)
Address Offset: $00ED
Bit 7
Read:
PPSS7
Write:
Reset: 0
6
5
4
PPSS6 PPSS5 PPSS4
0
0
0
= Reserved or unimplemented
3
PPSS3
0
2
PPSS2
0
1
PPSS1
0
Bit 0
PPSS0
0
Read: Anytime.
Write: Anytime.
This register selects whether a pull-down or a pull-up device is
connected to the pin.
MC9S12T64Revision 1.1.1
262
Port Integration Module (PIM)
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