DSP56857 datasheet(423/662 Pages) FREESCALE

423 / 662 page

General Purpose Input/Output (GPIO), Rev. 4

Freescale Semiconductor

15-23

15.8.28 Port D Pull-Up Enable Register (GPIOD_PUER)

Figure 15-37. Port D Pull-Up Enable Register (GPIOD_PUER)

See Programmer’s Sheet on Appendix page B - 132

15.8.28.1 Reserved—Bits 15–6

These bits are reserved or not implemented. They are read as 1 and cannot be modified by

writing.

15.8.28.2 Pull-Up Enable (PUE)—Bits 5–0

These bits control whether pull-ups are enabled for inputs in either Normal or GPIO mode. Pull

ups are automatically disabled for outputs in both modes.

•

0 = Pull ups disabled for inputs

•

1 = Pull ups enabled for inputs (default)

15.8.29 Port E Pull-Up Enable Register (GPIOE_PUER)

Figure 15-38. Port E Pull-Up Enable Register (GPIOE_PUER)

See Programmer’s Sheet on Appendix page B - 133

15.8.29.1 Reserved—Bits 15–4

These bits are reserved or not implemented. They are read as 1 and cannot be modified by

writing.

15.8.29.2 Pull-Up Enable (PUE)—Bits 3–0

These bits control whether pull-ups are enabled for inputs in either Normal or GPIO mode.

Pull ups are automatically disabled for outputs in both modes.

•

0 = Pull ups disabled for inputs

•

1 = Pull ups enabled for inputs (default)

Base + $3

Read

PUE

Write

Reset

111

Base + $3

Read

PUE

Write

Reset

111

DSP56857 Datasheet(PDF) 423 Page - Freescale Semiconductor, Inc