Freescale Semiconductor DSP56366 - Manual (Page 55)

SPDIF Transmitter Digital Audio Interface
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
Freescale Semiconductor 2-21
2.11 SPDIF Transmitter Digital Audio Interface
SDO4_1 Output 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.
SDI1_1 Input Serial Data Input 1_1 — When programmed as a receiver, SDI1 is used
to receive serial data into the RX1 serial receive shift register.
PE7 Input, output, or
disconnected
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 5 V tolerant.
Table 2-13 Digital Audio Interface (DAX) Signals
Signal
Name
Type
State During
Reset
Signal Description
ACI Input 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).
PD0 Input,
output, or
disconnected
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 5 V tolerant.
ADO Output GPIO
Disconnected
Digital Audio Data Output — This signal is an audio and non-audio
output in the form of AES/EBU, CP340 and IEC958 data in a biphase
mark format.
PD1 Input,
output, or
disconnected
Port D 1 — 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 5 V tolerant.
Table 2-12 Enhanced Serial Audio Interface_1 Signals (continued)
Signal
Name
Signal Type
State during
Reset
Signal Description