PC312XDP512F0CFVR datasheet(1003/1350 Pages) FREESCALE

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This register configures whether a pull-up or a pull-down device is activated, if the port is used as

input. This bit has no effect if the port is used as output. Out of reset no pull device is enabled.

24.0.5.18 Port T Polarity Select Register (PPST)

Read: Anytime.

Write: Anytime.

This register selects whether a pull-down or a pull-up device is connected to the pin.

24.0.5.19 Port S Data Register (PTS)

Read: Anytime.

Write: Anytime.

Table 24-21. PERT Field Descriptions

Field

Description

7–0

PERT[7:0]

Pull Device Enable Port T

0 Pull-up or pull-down device is disabled.

1 Either a pull-up or pull-down device is enabled.

76543210

PPST7

PPST6

PPST5

PPST4

PPST3

PPST2

PPST1

PPST0

Reset

00000000

Figure 24-20. Port T Polarity Select Register (PPST)

Table 24-22. PPST Field Descriptions

Field

Description

7–0

PPST[7:0]

Pull Select Port T

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.

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.

76543210

PTS7

PTS6

PTS5

PTS4

PTS3

PTS2

PTS1

PTS0

SCI/SPI

SS0

SCK0

MOSI0

MISO0

TXD1

RXD1

TXD0

RXD0

Reset

00000000

Figure 24-21. Port S Data Register (PTS)

PC312XDP512F0CFVR Datasheet(PDF) 1003 Page - Freescale Semiconductor, Inc

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