Service Guide

LTE Standard Module Series
EC200U_Series_Hardware_Design 25 / 94
V
IH
max = 2.0 V
WLAN_EN
136
DO
WLAN function
enable control
V
OL
max = 0.45 V
V
OH
min = 1.35 V
Antenna Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ANT_BT/WIFI_
SCAN
35
AIO
The shared antenna
interface of
Bluetooth and Wi-Fi
Scan
Bluetooth and Wi-Fi
Scan cannot be
used
simultaneously;
Wi-Fi Scan antenna
can
only receive but not
transmit.
50 Ω characteristic
impedance.
If unused, keep it
open.
ANT_GNSS
47
AI
GNSS antenna
interface
50 Ω characteristic
impedance. If
unused, keep it
open.
ANT_MAIN
49
AIO
Main antenna
interface
50 Ω characteristic
impedance.
USB_BOOT
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USB_BOOT
115
DI
Control pin for the
module to enter
download mode
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power domain,
a circuit design for
entering download
mode should be
reserved.
Other Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
WAKEUP_IN
1
DI
Wake up the module
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power domain.
Pull-up by default.
If unused, keep it
open.
AP_READY
2
DI
Application
processor ready
V
IL
min = -0.3 V
V
IL
max = 0.6 V
1.8 V power domain.
If unused, keep it