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GPIO (PORT D) - Pins and Registers
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
Freescale Semiconductor 10-13
10.7.2 Port D Direction Register (PRRD)
The read/write 24-bit Port D Direction Register controls the direction of the DAX GPIO pins. When port
pin[i] is configured as GPIO, PDC[i] controls the port pin direction. When PDC[i] is set, the GPIO port
pin[i] is configured as output. When PDC[i] is cleared the GPIO port pin[i] is configured as input.
Hardware and software reset clear all PRRD bits. Table 10-6 describes the port pin configurations.
Figure 10-7 Port D Direction Register (PRRD)
Table 10-6 DAX Port GPIO Control Register Functionality
PDC1 PC1 ADO/PD1 pin PDC0 PC0 ACI/PD0 pin DAX state
00Disconnected 00Disconnected Personal Reset
00Disconnected 0 1 PD0 Input Personal Reset
00Disconnected 1 0 PD0 Output Personal Reset
00Disconnected 1 1 ACI Enabled
0 1 PD1 Input 0 0 Disconnected Personal Reset
0 1 PD1 Input 0 1 PD0 Input Personal Reset
0 1 PD1 Input 1 0 PD0 Output Personal Reset
0 1 PD1 Input 1 1 ACI Enabled
10PD1 Output 00Disconnected Personal Reset
1 0 PD1 Output 0 1 PD0 Input Personal Reset
1 0 PD1 Output 1 0 PD0 Output Personal Reset
1 0 PD1 Output 1 1 ACI Enabled
11 ADO 00Disconnected Enabled
1 1 ADO 0 1 PD0 Input Enabled
7
PC1
1
PC0
04 3 25615 12 11 101314 89
read as zero, should be written with zero for future compatibility
23 20 19 182122 1617
PCRD -Port D Control Register - X:$FFFFD7
7
PDC1
1
PDC0
04 3 25615 12 11 101314 89
read as zero, should be written with zero for future compatibility
23 20 19 182122 1617
PRRD - Port D Direction Register - X:$FFFFD6
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