Quectel M12 User Manual

M12 Hardware Design
M12_Hardware_Design_V3.3 - 20 -
Module status indication
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
STATUS
54
O
Used to indicate
module’s operating
status. High level
indicates module
power-on and low
level indicates
power-down.
VOLmax=
0.15×VDD_EXT
VOHmin=
0.85×VDD_EXT
If unused, keep
this pin open.
Audio interfaces
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
MIC1P
MIC1N
23
24
I
Positive and
negative
voice-band input.
For Audio DC
characteristics refer to
Chapter 3.9.
If unused, keep
these pins open.
MIC2P
MIC2N
25
26
I
Auxiliary positive
and negative
voice-band input.
SPK1P
SPK1N
22
21
O
Positive and
negative
voice-band output.
SPK2P
20
O
Auxiliary positive
voice-band output.
AGND
19
Analog ground.
Separate ground
connection for
external audio
circuits.
General purpose input/output
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
GPIO1
38
I/O
Normal
input/output
port/Keypad
interface
VILmin=-0.3V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
VDD_EXT+0.3
VOLmax=
0.15×VDD_EXT
VOHmin=
0.85×VDD_EXT
If unused, keep
these pins open.
GPIO0
64
I/O
Normal
input/output port
NETLIGHT
6
O
Network status
indication
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Quectel M12 Specifications

General

Brand	Quectel
Model	M12
Category	Control Unit
Language	English