Product Info

LTE Module Series
AG35-Quecopen
Hardware Design
AG35-QuecOpen_Hardware_Design 28 / 137
ADC2 172 AI
General purpose
analog to digital
converter interface
Voltage range:
0.1V to 1.7V
If unused, keep it
open.
Audio Interface (Optional)
Pin Name Pin No. I/O Description DC Characteristics Comment
SPK2_P 132 AO
Earphone analog
output 2 (+)
If unused, keep it
open.
SPK2_N 133 AO
Earphone analog
output 2 (-)
If unused, keep it
open.
SPK1_P 134 AO
Earphone analog
output 1 (+)
If unused, keep it
open.
SPK1_N 135 AO
Earphone analog
output 1 (-)
If unused, keep it
open.
MICBIAS 136 AO
Bias voltage output
for microphone
Vmax=1.55V
Vmin=1.5V
Vnorm=1.525V
If unused, keep it
open.
MIC2_N 137 AI
Microphone analog
input 2 (-)
If unused, keep it
open.
MIC2_P 138 AI
Microphone analog
input 2 (+)
If unused, keep it
open.
MIC1_N 139 AI
Microphone analog
input 1 (-)
If unused, keep it
open.
MIC1_P 140 AI
Microphone analog
input 1 (+)
If unused, keep it
open.
AGND 141 Analog ground
If unused, keep it
open.
PCM Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
PCM_SYNC 65 IO
PCM data frame
synchronization
signal
V
OL
max=0.45V
V
OH
min=1.35V
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
In master mode, it is
an output signal. In
slave mode, it is an
input signal.
If unused, keep it
open.
PCM_IN 66 DI PCM data input
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.