Quectel UC20 Manual page 23

USIM_RST 17
USIM_PRE
13
SENCE
ADC Interface
Pin Name Pin No.
ADC0 45
ADC1 44
Main UART Interface
Pin Name Pin No.
RI 62
DCD 63
CTS 64
RTS 65
DTR 66
TXD 67
UC20_Hardware_Design
Reset signal of
DO
USIM card.
USIM card insertion
DI
detection.
I/O Description
General purpose
AI analog to digital
converter.
General purpose
AI analog to digital
converter.
I/O Description
DO Ring indicator.
Data carrier
DO
detection.
DO Clear to send.
DI Request to send.
DI Data terminal ready.
DO Transmit data.
Confidential / Released
UMTS/HSPA Module Series
UC20 Hardware Design
For 1.8V USIM:
V max = 0.22V
OL
V min = 1.44V
OH
For 3.0V USIM:
V max = 0.36V
OL
V min = 2.4V
OH
V min = -0.3V
IL
V max = 0.6V
IL
V min = 1.2V
IH
V max = 2.0V
IH
DC Characteristics
Voltage range:
0.2V to 2.1V
Voltage range:
0.2V to 4.2V
DC Characteristics
V max = 0.45V
OL
V min = 1.35V
OH
V max = 0.45V
OL
V min = 1.35V
OH
V max = 0.45V
OL
V min = 1.35V
OH
V min = -0.3V
IL
V max = 0.6V
IL
V min = 1.2V
IH
V max = 2.0V
IH
V min = -0.3V
IL
V max = 0.6V
IL
V min = 1.2V
IH
V max = 2.0V
IH
V max = 0.45V
OL
V min = 1.35V
OH
1.8V power domain.
Comment
Comment
1.8V power domain.
1.8V power domain.
1.8V power domain.
1.8V power domain.
1.8V power domain.
Pull-up by default.
1.8V power domain.
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