Signal/Connection Descriptions
Table 9. Enhanced Serial Audio Interface_1 Signals
State during
Signal Name
Signal Type
Signal Description
Reset
SDO1_1
Output
GPIO
Serial Data Output 1—SDO1_1 is used to transmit data from
disconnected the TX1 serial transmit shift register.
PE10
Input, output, or
disconnected
Port E10—When the ESAI_1 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_1
PE11
Output
GPIO
Serial Data Output 0—SDO0_1 is used to transmit data from
disconnected the TX0 serial transmit shift register.
Input, output, or
disconnected
Port E11—When the ESAI_1 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.
3.10
SPDIF Transmitter Digital Audio Interface
Table 10. Digital Audio Interface (DAX) Signals
Signal
Name
State During
Reset
Type
Signal Description
ACI
Input
GPIO
Audio Clock Input—This is the DAX clock input. When
Disconnected programmed to use an external clock, this input supplies the DAX
clock. The external clock frequency must be 256, 384, or 512
times the audio sampling frequency (256 × Fs, 384 × Fs or 512 ×
Fs, respectively).
PD0
Input,
Port D0—When the DAX is configured as GPIO, this signal is
individually programmable as input, output, or internally
disconnected.
output, or
disconnected
The default state after reset is GPIO disconnected.
Internal Pull down resistor.
This input is 5 V tolerant.
26
DSP56371 Technical Data
Freescale Semiconductor
FREESCALE [ Freescale ]
