Quectel UC20 Hardware Design page 22

USIM_PRE
SENCE
ADC Interface
Pin Name
ADC0
ADC1
Main UART Interface
Pin Name
RI
DCD
CTS
RTS
DTR
TXD
RXD
UC20_Hardware_Design
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USIM card insertion
13 DI
detection.
Pin No. I/O Description
General purpose
45 AI analog to digital
converter.
General purpose
44 AI analog to digital
converter.
Pin No. I/O Description
62 DO Ring indicator.
Data carrier
63 DO
detection.
64 DO Clear to send.
65 DI Request to send.
Data terminal ready,
66 DI
sleep mode control.
67 DO Transmit data.
68 DI Receive data.
V min = 2.55V
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
V min = -0.3V
IL
V max = 0.6V
IL
V min = 1.2V
IH
Confidential / Released
UMTS/HSPA Module Series
UC20 Hardware Design
1.8V power domain.
If unused, keep it
open.
Comment
If unused, keep it
open.
If unused, keep it
open.
Comment
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
Pull-up by default.
Low level wakes up
the module. If
unused, keep it open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
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