Quectel EC200U Series Hardware Design page 26

AUX_TXD 138
ADC Interfaces
Pin Name Pin No.
ADC2 43
ADC1 44
ADC0 45
Analog Audio Interface
Pin Name Pin No.
LOUDSPK_P 73
LOUDSPK_N 74
MIC_P 75
MIC_N 77
I2C Interface
Pin Name Pin No.
I2C_SCL 41
I2C_SDA 42
I2C2_SCL 141
I2C2_SDA 142
PCM Interface
Pin Name Pin No.
EC200U_Series_Hardware_Design
Auxiliary UART
DO
transmit
I/O Description
General-purpose
AI
ADC interface
General-purpose
AI
ADC interface
General-purpose
AI
ADC interface
I/O Description
Loudspeaker
AO differential output
(+)
Loudspeaker
AO
differential output (-)
Microphone analog
AI
input (+)
Microphone analog
AI
input (-)
I/O Description
OD I2C serial clock
OD I2C serial data
OD I2C serial clock
OD I2C serial data
I/O Description
LTE Standard Module Series
V max = 2.0 V
IH
V max = 0.45 V
OL
V min = 1.35 V
OH
DC Characteristics Comment
Voltage range:
–
0 VBAT_BB
Voltage range:
–
0 VBAT_BB
Voltage range:
–
0 VBAT_BB
DC Characteristics Comment
DC Characteristics
DC Characteristics
1.8 V power domain.
If unused, keep it
open.
Use 1 kΩ resistor in
series.
If unused, keep it
open.
The external resistor
should be less than
100 kΩ when the
voltage divider
resistor applies.
If unused, keep them
open.
Comment
Require external
pull-up to 1.8 V if
used.
If unused, keep it
open.
Comment
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