DSP56303 datasheet(276/292 Pages) FREESCALE

部件名	DSP56303

功能描述	DSP56303 USER?셎 MANUAL

PDF	292 Pages

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制造商	FREESCALE [Freescale Semiconductor, Inc]

网页	http://www.freescale.com

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DSP56303 User’s Manual, Rev. 2

B-32

Freescale Semiconductor

Programming Reference

Figure B-23. Port C Registers (PCRC, PRRC, PDRC)

Application:

Date:

Programmer:

Sheet 2 of 4

GPIO

4321

PCC5

PCC4

PCC3

PCC2

PCC1

PCC0

Port C Control Register (PCRC)

X:$FFFFBF Read/Write

Reset = $000000

*= Reserved, Program as 0

PCn = 1

→ Port Pin configured as ESSI

PCn = 0

→ Port Pin configured as GPIO

Port C (ESSI0)

4321

PRC5

PRC4

PRC3

PRC2

PRC1

PRC0

Port C Direction Register (PRRC)

X:$FFFFBE Read/Write

Reset = $000000

PDCn = 1

→ Port Pin is Output

PDCn = 0

→ Port Pin is Input

4321

PDC5

PDC4

PDC3

PDC2

PDC1

PDC0

Port C GPIO Data Register (PDRC)

X:$FFFFBD Read/Write

Reset = $000000

if port pin n is GPIO input, then PDn reflects the

value on port pin n

if port pin n is GPIO output, then value written to

PDn is reflected on port pin n

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