DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 278

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Programming Reference
B-34
Application:
GPIO
Figure B-25. Port E Registers (PCRE, PRRE, PDRE)
Port E Control Register (PCRE)
Reset = $000000
PDCn = 1 → Port Pin is Output
PDCn = 0 → Port Pin is Input
Port E Direction Register (PRRE)
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
Port E GPIO Data Register (PDRE)
Reset = $000000
PCn = 1 → Port Pin configured as ESSI
PCn = 0 → Port Pin configured as GPIO
23
23
23
*
*
*
0
0
0
*
*
*
0
0
0
6
6
6
*
*
*
0
0
5
5
5
0
DSP56303 User’s Manual, Rev. 2
*
*
0
0
*
0
4
4
4
*
*
0
*
0
0
3
3
3
Port E (SCI)
PRE2
PCE2
PDE2
2
2
2
PRE1
PCE1
PDE1
1
1
1
PRE0
PCE0
PDE0
0
0
0
X:$FFFF9F Read/Write
X:$FFFF9E Read/Write
X:$FFFF9D Read/Write
*
= Reserved, Program as 0
Date:
Programmer:
Freescale Semiconductor
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