PCM510xEVM-U
2.6
Use Cases
2.6.1
Scripts and Setup
While the PCM510x is only hardware programmable, the CodecControl software is still necessary to
properly configure the PCM510xEVM-U for different use cases, such as USB playback or optical/SPDIF
input to the PCM510x. Most of the I/O routing and clock frequency selection on the PCM510x evaluation
module is performed by the SRC4392.
and
are two example scripts that adjust
the SRC4392 registers accordingly, as well as set proper jumper configurations.
There are several use cases for which the PCM510xEVM-U can be used. Depending on whether it is USB
playback, or optical/SPDIF input, for example, there may need to be changes made in the scripts and
jumper configuration to accommodate these cases. Likewise, the shunts on header W3 may need to be
installed accordingly.
and
are some example use cases for the PCM5101 for
USB playback and optical/SPDIF input, respectively.
2.6.2
USB Playback
# The following script is used for playback via USB
# 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 ------#
# 24bit I2S, Master mode, DIR source, at mute
# Divide by 256, MCLK input source
# Unmute Port A Output
# power on port A and B
w E0 01 38
# set up port A as master, 24 bit I2S sourced from port B
w E0 03 19
# select
MCLK as source at 256fs
w E0 04 01
# port B slave, 24 bit I2S
w E0 05 01
#----- Setup DIR ------#
#DIR Config 1
# Input source: RX2 - S/PDIF RCA (default)
#w E0 0D 01
# 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
# Comment 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
7
SBAU190A
–
May 2011
–
Revised June 2011
PCM510xEVM-U
Copyright
©
2011, Texas Instruments Incorporated