Port D Registers (Pcrd, Prrd, Pdrd - Motorola DSP56303 User Manual

Programming Sheets
Application:
GPIO
Port D Control Register (PCRD)
Reset = $000000
PDCn = 1
PDCn = 0
Port D Direction Register (PRRD)
Reset = $000000
if port pin n is GPIO input, then PDn reflects the
value on port pin n
if port pin n is GPIO output, then value written to
PDn is reflected on port pin n
Port D GPIO Data Register (PDRD) X:$FFFFAD Read/Write
Reset = $000000
Figure B-25. Port D Registers (PCRD, PRRD, PDRD)
B-36
Port D (ESSI1)
PCn = 1 Port Pin configured as ESSI
PCn = 0 Port Pin configured as GPIO
23 6 5 4 3
* * PCD5 PCD4 PCD3
0 0
Port Pin is Output
Port Pin is Input
23 6 5 4 3
* * PRD5 PRD4 PRD3
0 0
23 6 5 4 3
* *
PDD5 PDD4 PDD3
0 0
DSP56303 User's Manual
2 1 0
PCD2 PCD1 PCD0
X:$FFFFAF Read/Write
2 1 0
PRD2 PRD1 PRD0
X:$FFFFAE Read/Write
2 1 0
PDD2 PDD1 PDD0
Date:
Programmer:
Sheet 3 of 4
*
= Reserved, Program as 0