Signal/Connection Descriptions
Table 8. Enhanced Serial Audio Interface Signals (Continued)
Signal
Name
State during
Reset
Signal Type
Signal Description
SDO2
SDI3
PC9
Output
GPIO
Serial Data Output 2—When programmed as a transmitter,
disconnected SDO2 is used to transmit data from the TX2 serial transmit shift
register
Input
Serial Data Input 3—When programmed as a receiver, SDI3 is
used to receive serial data into the RX3 serial receive shift
register.
Input, output, or
disconnected
Port C9—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.
Internal Pull down resistor.
This input is 5 V tolerant.
SDO1
PC10
Output
GPIO
Serial Data Output 1—SDO1 is used to transmit data from the
disconnected TX1 serial transmit shift register.
Input, output, or
disconnected
Port C10—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.
Internal Pull down resistor.
This input is 5 V tolerant.
SDO0
PC11
Output
GPIO
Serial Data Output 0—SDO0 is used to transmit data from the
disconnected TX0 serial transmit shift register.
Input, output, or
disconnected
Port C11—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.
Internal Pull down resistor.
This input is 5 V tolerant.
Freescale Semiconductor
DSP56371 Technical Data
21
FREESCALE [ Freescale ]
