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Programmer’s Reference
DSP56364 24-Bit Digital Signal Processor Users Manual, Rev. 2
Freescale Semiconductor C-23
Figure C-15. Port B Registers (PCRB, PRRB, PDRB)
Application:
Date:
Programmer:
Sheet 2 of 3
GPIO
2311 987654
Port B Control Register
X:$FFFFCF
Reset = $0
(PCRB)
ReadWrite
*
= Reserved, Program as 0
*
0
Port B (GPIO)
23 10987654
Port B Direction Register
X:$FFFFCE
Reset = $0
(PRRB)
ReadWrite
*
0
23 11 9 8 7 6 4 3
PD3
Port B GPIO Data Register
X:$FFFFCD
Reset = $0
(PDRB)
ReadWrite
*
0
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
3210
10
PC3
PC2 PC1
PC0
11
0123
PDC3 PDC2
PDC1
PDC0
10
5
PD2
PD1
PD0
210
PCn = 0 & PDCn = 0 -> Port pin PCn disconnected
PCn = 1 & PDCn = 0 -> Port pin PCn configured as input
PCn = 0 & PDCn = 1 -> Port pin PCn configured as output
PCn = 1 & PDCn = 1 -> Open-Drain Output
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0