Quectel EC21 Series User Manual

LTE Standard Module Series
EC21_Series_Hardware_Design
36
/ 118
open.
Other Interface Pins
Pin Name Pin No. I/O Description DC Characteristics Comment
WAKEUP_IN 1 DI
Sleep mode
control
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
Cannot be pulled up
before startup.
Low level can wake
up the module.
If unused, keep it
open.
W_DISABLE# 4 DI
Airplane mode
control
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
Pull-up by default.
At low level, module
can enter airplane
mode.
If unused, keep it
open.
AP_READY 2 DI
Application
processor sleep
state detection
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it
open.
USB_BOOT Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
USB_BOOT 115 DI
Force the module
to enter
emergency
download mode.
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
Cannot be pulled up
before startup.
Active high.
It is recommended to
reserve test point.
RESERVED Pins
Pin Name Pin No. Comment
RESERVED 3, 18, 43, 55, 73–84, 113, 114, 116, 117, 140–144
Keep these pins
unconnected.

Quectel EC21 Series Specifications

General

Brand	Quectel
Model	EC21 Series
Category	Control Unit
Language	English