CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
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This module defines the RESERVED and NC pins to be left floating and must not be
used.
3.3 Power interface
CLM920 NC3 module power interface consists of three parts
：
VBAT is the module working power supply
UIM_PWR is the working power supply for SIM card
VDD_EXT is 1.8V output power (50mA)
VDD_SDIO is the SD card pull-up power supply (50mA)
3.3.1 Power supply design
CLM920 NC3 module power interface is as follows
：
Table 3-4 Power pin definitions
Pin number
Name
I/O
Description
Minimum
voltage
Typical
voltage
Maximum
voltage
57,58,59,60
VBAT
PI
Module power
supply
3.3V
3.7V
4.2V
14
UIM_PWR
PO
SIM power
supply
0
1.8V
/2.85V
1.98/3.3V
7
VDD_EXT
PO Output power
1.8V
34
VDD_SDIO
PO Output power
1.8V
/2.85V
8,9,10,19,22,
36,46,48,50,
51,52,53,54,
56,72,
85~112
GND
Ground
-
0
-
The CLM920 NC3 module is available in a single-supply mode with four power supply
pins. The VBAT power supply range is 3.3 to 4.2V. It is recommended to use 3.7V/2A power
supply. When transmitting data or talking under HSPA/UTMS/GSM network, the
instantaneous high-power transmission will produce a peak current of more than 2A peak,