Freescale-semiconductor DSP56366 User Manual Page 198

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GPIO - Pins and Registers
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
8-48 Freescale Semiconductor
8.5.3 Port C Data register (PDRC)
The read/write 24-bit Port C Data Register (see Figure 8-21) 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
configured as GPIO. If a port pin [i] is configured as a GPIO input, then the corresponding PD[i] bit
reflects the value present on this pin. If a port pin [i] is configured as a GPIO output, then the value written
into the corresponding PD[i] bit is reflected on this pin. If a port pin [i] is configured as disconnected, the
corresponding PD[i] bit is not reset and contains undefined data.
Table 8-12 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:$FFFFBF PC11 PC10 PC9 PC8 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
23 22 21 20 19 18 17 16 15 14 13 12
Reserved bit - read as zero; should be written with zero for future compatibility.
Figure 8-19 PCRC Register
11109876543210
X:$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 8-20 PRRC Register
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