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Enhanced Serial Audio Interface
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
Freescale Semiconductor 2-17
SDO5 Output GPIO
disconnected
Serial Data Output 5 — When programmed as a transmitter, SDO5 is
used to transmit data from the TX5 serial transmit shift register.
SDI0 Input Serial Data Input 0 — When programmed as a receiver, SDI0 is used
to receive serial data into the RX0 serial receive shift register.
PC6 Input, output, or
disconnected
Port C 6 — When the ESAI is configured as GPIO, this signal is
individually programmable as input, output, or internally disconnected.
The default state after reset is GPIO disconnected.
This input is 5 V tolerant.
SDO4 Output GPIO
disconnected
Serial Data Output 4 — When programmed as a transmitter, SDO4 is
used to transmit data from the TX4 serial transmit shift register.
SDI1 Input Serial Data Input 1 — When programmed as a receiver, SDI1 is used
to receive serial data into the RX1 serial receive shift register.
PC7 Input, output, or
disconnected
Port C 7 — When the ESAI is configured as GPIO, this signal is
individually programmable as input, output, or internally disconnected.
The default state after reset is GPIO disconnected.
This input is 5 V tolerant.
SDO3/
SDO3_1
Output GPIO
disconnected
Serial Data Output 3 — When programmed as a transmitter, SDO3 is
used to transmit data from the TX3 serial transmit shift register.
When enabled for ESAI_1 operation, this is the ESAI_1 Serial Data
Output 3.
SDI2/
SDI2_1
Input Serial Data Input 2 — When programmed as a receiver, SDI2 is used
to receive serial data into the RX2 serial receive shift register.
When enabled for ESAI_1 operation, this is the ESAI_1 Serial Data Input
2.
PC8/PE8 Input, output, or
disconnected
Port C 8 — When the ESAI is configured as GPIO, this signal is
individually programmable as input, output, or internally disconnected.
When enabled for ESAI_1 GPIO, this is the Port E 8 signal.
The default state after reset is GPIO disconnected.
This input is 5 V tolerant.
Table 2-11 Enhanced Serial Audio Interface Signals (continued)
Signal Name Signal Type
State during
Reset
Signal Description