Port C Signals And Registers; Port D Signals And Registers; Port C Signals; Port D Signals - Motorola DSP56303 User Manual

General-Purpose Input/Output (GPIO)
5.5.2

Port C Signals and Registers

Each of the six Port C signals not used as an ESSI0 signal can be configured as a GPIO signal.
Three registers control the GPIO functionality of Port C: Port C control register (PCRC), Port
C direction register (PRRC), and Port C data register (PDRC). Chapter 7, Enhanced
Synchronous Serial Interface (ESSI), discusses these registers.
Enhanced Synchronous
Serial Interface Port 0
5.5.3

Port D Signals and Registers

Each of the six Port D signals not used as an ESSI1 signal can be configured as a GPIO signal.
Three registers control the GPIO functionality of Port D: Port D control register (PCRD), Port
D direction register (PRRD), and Port D data register (PDRD). Chapter 7, Enhanced
Synchronous Serial Interface (ESSI), discusses these registers.
Enhanced Synchronous
Serial Interface Port 1
5-8
DSP56303
(ESSI0)
Figure 5-3. Port C Signals
DSP56303
(ESSI1)
Figure 5-4. Port D Signals
DSP56303 User's Manual
Port C GPIO
SC0[0–2]
PC[0–2]
SCK0 PC3
SRD0 PC4
STD0 PC5
SC1[0–2]
SCK1
SRD1
STD1
Port D GPIO
PD[0–2]
PD3
PD4
PD5