Spdif Transmitter Digital Audio Interface - Motorola DSP56367 User Manual

Signal/Connection Descriptions

SPDIF Transmitter Digital Audio Interface

Table 2-12 Enhanced Serial Audio Interface_1 Signals
Signal
Signal Type
Name
SCKT_1 Input or output
PE3 Input, output, or
disconnected
SDO5_1 Output
SDI0_1 Input
PE6 Input, output, or
disconnected
SDO4_1 Output
SDI1_1 Input
PE7 Input, output, or
disconnected
2.11 SPDIF TRANSMITTER DIGITAL AUDIO INTERFACE
Table 2-13 Digital Audio Interface (DAX) Signals
Signal
Type
Name
ACI Input
PD0 Input,
output, or
disconnected
2-20
State during Reset
GPIO disconnected Transmitter Serial Clock_1—This signal provides the serial bit rate clock
for the ESAI. SCKT is a clock input or output used by all enabled transmitters
and receivers in synchronous mode, or by all enabled transmitters in
asynchronous mode.
Port E 3—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 cannot tolerate 3.3V.
GPIO disconnected Serial Data Output 5_1—When programmed as a transmitter, SDO5 is used
to transmit data from the TX5 serial transmit shift register.
Serial Data Input 0_1—When programmed as a receiver, SDI0 is used to
receive serial data into the RX0 serial receive shift register.
Port E 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 cannot tolerate 3.3V.
GPIO disconnected Serial Data Output 4_1—When programmed as a transmitter, SDO4 is used
to transmit data from the TX4 serial transmit shift register.
Serial Data Input 1_1—When programmed as a receiver, SDI1 is used to
receive serial data into the RX1 serial receive shift register.
Port E 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 3.3V tolerant.
State During Reset
GPIO Disconnected Audio Clock Input—This is the DAX clock input. When 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).
Port D 0—When the DAX 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 3.3V tolerant.
DSP56367
Signal Description
Signal Description
MOTOROLA