# This code file  assumes a 24.576MHz master clock and then sets up Ports A and B for 96kHz 24 bit I2S output (master mode).  
# This script will probably need to be tweaked some, but it should provide a good starting point. 
# One thing to note is the MCLK reference chosen for Ports A and B and the DIR is "MCLK" pin, this may need to be changed to "RXCKI" depending on the application.  
# When feeding the TAS and PCM devices make sure the MCLK for those devices is synchronous to the BCLK / WCLK being fed to them.

2)  There is not set clock, I chose MCLK assuming that the MCLK pin will be fed with a clock. 

3)  By writing register 0x01, you can power down different sections of the SRC individually for lower-power, without having to reset all the registers (pg 51 of the d/s).


# RESET RESET THIS IS MASTER RESET FOR SRC (48kHz)

# Page 0 = DEFAULT for Control

# Write to page 0

#

w E0 7F 00

# Register 01, Bit 7 = 1 resets to default

d 100

w E0 01 80

# Delay 0.1 sec to allow part to reset

d 100

# Register 01, Bit 7 = 0 for normal operation

w E0 01 00

d 100

# w E0 7F 00

 

# Register 01, Bit 7 = 1 resets to default

#----- Setup Port A/B ------#

# 24bit I2S, Master mode, DIR source, at mute

# Divide by 256, MCLK input source

#

w E0 03 69
w E0 04 01

w E0 05 69
w E0 06 01
 

#----- Setup DIR ------#

#DIR Config 1

# Input source: RX2 - S/PDIF RCA (default)

#w E0 0D 09

# Input source: RX4 - S/PDIF optical, RX_MUX = RX1

w E0 0D 08

 

#DIR Config 2 - default

w E0 0E 01

 

#----- Setup DIT -----#

# DIT COnfig 1

# Port A data in, DIv 256

w E0 07 80

 

# DIT Config 2

# Default is to output to RCA

# Commment out RCA and uncomment Optical for optical outputs

 

#Output to RCA

# TX - ON, TX MUTE - ON, Optical disabled

#w E0 08 06

# TX Mute - OFF

#w E0 08 04

 

#Output to Optical

# TX - OFF, TX MUTE - ON, optical disabled

w E0 08 03

# TX MUTE - OFF

w E0 08 01

 

#----- PLL Configuration -----#

# Set P=2, J=8, D=0

w E0 0F 22

w E0 10 1B

w E0 11 A3

 

# GPIO1 Config

# GPIO1 = RCVR non-audio data

w E0 1B 06

 

# GPIO2 Config

# GPIO2 = RCVR non-valid data

w E0 1C 07

 

# Power Status

# Disable RCVR (/PDRX) and Port B(/PDPB) power down and enable All Function power down

#w E0 01 14

 

# Unmute Port A/B Output

w E0 03 29
w E0 05 29

 

# Disable All Function power down (all blocks set by local control)

w E0 01 3F