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4.3. Audio Path Control Relay Switch Setting
Audio Path
Hook
Status
Door Phone <-> Handset
Off
SWhk ON
On
Door Phone <-> HT
SWhk OFF
Handset <-> HT
Off
SWhk ON
Default Setting
On
SWhk OFF
Remark: SW3 is normal-closed type relay switch. It is ON by default after the
machine having been powered on.
4.4. AD1881/ALC200 Audio Codec Signals
Codec Pin
Direction
MIC1
Input
LINOUTR
Output
LINOUTL
Output
LINEINL
Input
Remark: The AP program developer should control the LINOUTR, LINOUTL,
LINEINL and MIC1 of AD1881/ALC200 as well as the GPIO pins directly.
EH-7104G Guide ver 1.doc
Relay SW Selection Control
Switch
RDI3#
RDI2
(GOIP23)
(GPIO22)
Hook
0
0
SW3 ON
SW2 OFF
Hook
0
1
SW3 ON
SW2 ON
Hook
1
0
SW3 OFF
SW2 OFF
Hook
0
0
SW3 ON
SW2 OFF
External Connection
Built-in Mic
LINE OUT to the right channel of amplifier
circuit. Reserved for stereo music application.
LINE OUT (Door Phone & Handset)
Also through left channel of amplifier circuit
to Built-in Speaker
LINE IN (Door Phone & Handset)
5 of 10
05/07/20
Advantech Confidential
Exclusively for Midoriya
RDI1
(GPIO21)
0
SW1 OFF
0
SW1 OFF
1
SW1 ON
0
SW1 OFF
刪除: 1
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