Quectel LTE OPEN EVB User Manual

LTE Module Series
LTE OPEN EVB User Guide
LTE_OPEN_EVB_User_Guide 38 / 62
Table 16: eMMC Function GPIO Configuration
4.8. UART Interfaces (J0501/J0502/J0503)
LTE OPEN EVB offers three UART interfaces: COM (DEBUG) J0501, COM3 (MAIN) J0502 and COM
(UART1) J0503.
 J0501 can be used for Linux console and log output.
 J0502 is intended for the communication between the module and the host application. It can be
used for data transmission and AT command communication.
 J0503 is intended for the communication between the module and the host application. It can be
used for data transmission.
The following figure shows the block diagram of J0501/J0502/J0503 on LTE OPEN EVB.
J0101
LTE-
QuecOpen
Module
RS-232
Level Match
3.0V/1.8V
Level Translator
COM (DEBUG)
DB9
J0501
RS-232 3.0V
1.8V
U0504
U0502
RS-232
Level Match
3.0V/1.8V
Transistor Level
Translator
COM (UART1)
DB9
J0503
RS-232 3.0V
U0502
1.8V
U0504
RS-232
Level Match
3.0V/1.8V
Transistor Level
Translator
COM (MAIN)
DB9
J0502
RS-232 3.0V
U0501
U0503
1.8V
Figure 31: UART Block Diagram
Pin No.
Pin Name
Operation
Pin No.
Pin Name
Pin 39 (J0201)
EMMC_RSTN
Shorted to
Pin 38 (J0201)
GPIO_26

Quectel LTE OPEN EVB Specifications

General

Brand	Quectel
Model	LTE OPEN EVB
Category	Control Unit
Language	English