Configuration Pins - Quectel RM520N-GL Hardware Design

4.7. Configuration Pins

The module provides four configuration pins, which are defined as below.
Table 27: Configuration Pins List of M.2 Specification
CONFIG_0 CONFIG_1
(Pin 21) (Pin 69)
NC GND
Table 28: Configuration Pins of the Module
Pin No. Pin Name
21 CONFIG_0
69 CONFIG_1
75 CONFIG_2
1 CONFIG_3
The following figure shows a reference circuit of these four pins.
Host
GPIO
GPIO
GPIO
GPIO
NOTE: The voltage level of VCC_IO_HOST depends on the host side and could be 1.8 V or 3.3 V.
RM520N-GL_Hardware_Design
CONFIG_2 CONFIG_3
(Pin 75) (Pin 1)
NC NC
I/O
DO
DO
DO
DO
VCC_IO_HOST
R1 R2 R3
10k 10k 10k
Figure 24: Recommended Circuit of Configuration Pins
Module Type and
Main Host Interface
Quectel defined
Description
Not connected internally
Connected to GND internally
Not connected internally
Not connected internally
R4
10k
CONFIG_0
CONFIG_1
CONFIG_2
CONFIG_3
5G Module Series
Port
Configuration
2
Module
NM-0Ω
21
0Ω
69
NM-0Ω
75
NM-0Ω
1
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