Enhanced Serial Audio Interface
DSP56364 Technical Data, Rev. 4
Freescale Semiconductor
2-11
SDI1
Input
GPIO
disconnected
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
GPIO
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
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.
SDI2
Input
GPIO
disconnected
Serial Data Input 2
—When programmed as a receiver, SDI2 is used to receive
serial data into the RX2 serial receive shift register.
PC8
Input, output, or
disconnected
GPIO
disconnected
Port C 8
—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.
SDO2
Output
GPIO
disconnected
Serial Data Output 2
—When programmed as a transmitter, SDO2 is used to
transmit data from the TX2 serial transmit shift register
SDI3
Input
GPIO
disconnected
Serial Data Input 3
—When programmed as a receiver, SDI3 is used to receive
serial data into the RX3 serial receive shift register.
PC9
Input, output, or
disconnected
GPIO
disconnected
Port C 9
—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.
SDO1
Output
GPIO
disconnected
Serial Data Output 1
—SDO1 is used to transmit data from the TX1 serial
transmit shift register.
PC10
Input, output, or
disconnected
GPIO
disconnected
Port C 10
—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.
SDO0
Output
GPIO
disconnected
Serial Data Output 0
—SDO0 is used to transmit data from the TX0 serial
transmit shift register.
PC11
Input, output, or
disconnected
GPIO
disconnected
Port C 11
—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.
Table 2-10 Enhanced Serial Audio Interface Signals (continued)
Signal
Name
Signal Type
State during
Reset
Signal Description