Freescale Semiconductor DSP56364 - page 179

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 PDC2PDC1PDC0
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