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©2016 Axia Audio- Rev 1.8.1
GPIO Codec Logic
Name
Pin
Type
Notes
INPUTS
ON Command
11
Active Low Input
Turns channel ON
OFF Command
12
Active Low Input
Turns channel OFF
TALK (to CR) Command
13
Active Low Input
Mutes channel outputs and
routes source audio to PVW
speakers
MUTE Command
14
Active Low Input
Mutes channel outputs
TALK (to SOURCE) Command
15
Active Low Input
Allows an external button
to activate channel TALK TO
SOURCE function.
OUTPUTS
ON Lamp
1
Open Collector to Logic Com-
mon Return
Illuminates when channel is
ON unless TALK or MUTE are
active
OFF Lamp
2
Open Collector to Logic Com-
mon Return
Illuminates when channel is
OFF.
TALK (to CR) Lamp
3
Open Collector to Logic Com-
mon Return
Illuminates when TALK is
active
MUTE Lamp
4
Open Collector to Logic Com-
mon Return
Illuminates when MUTE is
active
TALK (to SOURCE) Lamp
5
Open Collector to Logic Com-
mon Return
Illuminates when the channel
TALK TO SOURCE function is
active.
POWER & COMMON
Source Common
7
Logic Common
Connect to ground of source
device or to Pin 8
Logic Common
8
Internal 5 Volt return
Can be connected to Pin 7 if
source is not providing com-
mon
Logic + 5 Volt supply
9
Logic Supply, Individually
Fused
Can be connected to Pin 10
if source is not providing
voltage; active only when
source has been assigned to
channel.
Source Supply
10
Common for all 5 inputs
Connect to power supply of
source device or to Pin 9
NOT CONNECTED
6
8 7 6 5 4 3 2 1
15 14 13 12 11 10 9
ØV (GND)
SOURCE
OUTPUT
COMMON
RETURN
OUT
5
OUT
2
OUT
3
OUT
4
OUT
1
N/C
IN
5
IN
4
IN
3
IN
2
IN
1
IN
COM
+
+5 V
POWER
SOURCE
GPIO v.”ZA” 4/2009
