94 Chapter 12 CEC Interactive Troubleshooting Environment (ITE)
Controlling the Audio Return Channel (ARC)
You can issue the necessary messages to control the HDMI 1.4 Audio Return Channel
(ARC) either through the command line or the CEC/CDC Controller.
To emulate an ARC device you will need the TPA-EAC-4R test point adapter. Please refer
to the 882 web pages on the Quantum Data website for an Application Note on the
TPA-EAC-4R.
The table below describes the ARC control messages.
To test ARC functions of an ARC-equipped AVR while emulating an ARC-equipped
TV:
1. Enter the following command to initiate ARC on an ARC-equipped AVR.
Command Function Syntax Example
Initiate ARC Used by an ARC Rx
device to activate the
ARC functionality in an
ARC Tx device.
CECx:MSGX I F CO
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
CO = opcode for Initiate ARC
message
CEC3:MSGX 5 0 C0
Sends an Initiate ARC
command from CEC core
3 from an AVR to a TV.
Report ARC
initiated
Used by an ARC Tx
device to indicate that its
ARC functionality has
been activated.
CECx:MSGX I F C1
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C1 = opcode for Report ARC
Initiated
CEC1:MSGX 0 5 C1
Sends a Report ARC
initiated command from
CEC core 1 from a TV to
an AVR.
Report ARC
terminated
Used by an ARC Tx
device to indicate that
ARC functionality has
been deactived.
CECx:MSGX I F C2
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C2 = opcode for Report ARC
terminated
CEC1:MSGX 0 5 C2
Sends Report ARC
terminated command
from CEC core 1 from a
TV to an AVR.
Request ARC
Initiation
Used by an ARC Tx
device to request an ARC
Tx device to activate the
ARC functionality in the
ARC Tx device.
CECx:MSGX I F C3
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C3 = opcode for Request
ARC Initiation
CEC1:MSGX 0 5 C3
Sends Request ARC
Initiation command from
CEC core 1 from a TV to
an AVR.
Request ARC
Termination
Used by an ARC Tx
device to request an ARC
Rx device to deactivate
the ARC functionalty in
the ARC Tx deivce.
CECx:MSGX I F C4
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C4 = opcode for Request
ARC Termination
CEC1:MSGX 0 5 C4
Sends a Request ARC
Termination command
from CEC core 1 from a
TV to an AVR.
Terminate
ARC
Used by an ARC Tx
device to deactivate the
ARC functionality in an
ARC Tx device.
CECx:MSGX I F C5
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C5 = opcode for Terminate
ARC
CEC3:MSGX 5 0 C5
Sends an Initiate ARC
command from CEC
core 3 from an AVR to a
TV.
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