MC9S12T64 Datasheet, PDF (259/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Port Integration Module (PIM)
Register Descriptions
Port T Polarity
Select Register (PPST)
Address Offset: $00E5
Bit 7
Read:
PPST7
Write:
Reset: 0
6
5
4
PPST6 PPST5 PPST4
0
0
0
= Reserved or unimplemented
3
PPST3
0
2
PPST2
0
1
PPST1
0
Bit 0
PPST0
0
Read: Anytime.
Write: Anytime.
This register selects whether a pull-down or a pull-up device is
connected to the pin.
PPST[7:0] — Pull Select Port T
1 = A pull-down device is connected to the associated port T pin, if
enabled by the associated bit in register PERT and if the port
is used as input.
0 = A pull-up device is connected to the associated port T pin, if
enabled by the associated bit in register PERT and if the port
is used as input.
Port S I/O Register
(PTS)
Address Offset: $00E8
Bit 7
Read:
PTS7
Write:
SPI/SCI: SS
Reset: 0
6
5
4
PTS6
PTS5
PTS4
SCK
MOSI
MISO
0
0
0
= Reserved or unimplemented
3
PTS3
TxD1
0
2
PTS2
RxD1
0
1
PTS1
TxD0
0
Bit 0
PTS0
RxD0
0
Read: Anytime.
Write: Anytime.
If the data direction bits of the associated I/O pins are set to 1, a read
returns the value of the port register, otherwise the value at the pins is
read.
Port Integration Module (PIM)
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MC9S12T64Revision 1.1.1