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GPIO - Pins and Registers
DSP56364 24-Bit Digital Signal Processor Users Manual, Rev. 2
Freescale Semiconductor 6-49
6.5.2 Port C Direction Register (PRRC)
The read/write 24-bit Port C Direction Register (PRRC) in conjunction with the Port C Control Register
(PCRC) controls the functionality of the ESAI GPIO pins. Table 6-12 describes the port pin
configurations. Hardware and software reset clear all PRRC bits.
6.5.3 Port C Data register (PDRC)
The read/write 24-bit Port C Data Register (see Figure 6-21) is used to read or write data to/from ESAI
GPIO pins. Bits PD(11:0) are used to read or write data from/to the corresponding port pins if they are
Table 6-12 PCRC and PRRC Bits Functionality
PDC[i] PC[i] Port Pin[i] Function
0 0 disconnected
0 1 GPIO input
1 0 GPIO output
1 1 ESAI
11109876543210
X:$FFFFBF PC11 PC10 PC9 PC8 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
23 22 21 20 19 18 17 16 15 14 13 12
Reserved bit - read as zero; should be written with zero for future compatibility.
Figure 6-19 PCRC Register
11109876543210
X:$FFFFBE PDC11 PDC10 PDC9 PDC8 PDC7 PDC6 PDC5 PDC4 PDC3 PDC2 PDC1 PDC0
23 22 21 20 19 18 17 16 15 14 13 12
Reserved bit - read as zero; should be written with zero for future compatibility.
Figure 6-20 PRRC Register