Motorola DSP56305 User Manual page 640

PROGRAMMING REFERENCE
Application:
GPIO
Port D Control Register
Port D Direction Register
Port D GPIO Data Register
Figure D-24 Port D Registers (PCRD, PRRD, PDRD)
D-40
Port D (ESSI1)
23 6
* *
(PCRD)
0 0
X:$FFFFAF
ReadWrite
Reset = $0
PCn = 1 → Port Pin configured as ESSI
PCn = 0 → Port Pin configured as GPIO
23 6
* *
(PRRD)
0 0
X:$FFFFAE
ReadWrite
Reset = $0
PDCn = 1 → Port Pin is Output
PDCn = 0 → Port Pin is Input
23 6
* *
(PDRD)
0 0
X:$FFFFAD
ReadWrite
Reset = $0
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
= Reserved, Program as 0
*
DSP56305 User's Manual
Date:
Programmer:
5 4 3 2 1
PC5 PC4 PC3 PC2 PC1
5 4 3 2 1
PDC5 PDC4 PDC3 PDC2 PDC1
5 4 3 2 1
PD5 PD4 PD3 PD2 PD1
Sheet 3 of 4
0
PC0
0
PDC0
0
PD0
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