Hangzhou Tuya Inc.
NM1 Module Hardware Design Manual
https://www.tuya.com
Page 9 of 29
2.3 Product Functions
2.3.1 Baseband Functions
The NM1 module baseband includes the USB interface signal, SIM card interface signal, I
2
C interface signal,
UART interface signal, working status indicator signal, module startup and reset signals, and multiplexing
control signals, power supply, and grounding of multiple GPIO interfaces.
Figure 2- 3 System connection framework
2.3.2 RF Functions
Table 2- 2 Working frequency bands
Note: The NM1 module is being developed to support the frequency bands with an asterisk (*).
Working Frequency Band
Uplink (MHz)
Downlink (MHz)
B1
1920–1980
2110–2170
B3
1710–1785
1805–1880
B5
824–849
869-894
B8
880–915
925–960
B20
832–862
791–821
