TUYA NB-IoT Series, Руководство по конструкции аппаратуры

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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual
https://www.tuya.com
Page 5 of 29
Figures
Figure 2- 1 Product appearance..................................................................................................................................... 7
Figure 2- 2 Package size diagram (unit: mm)............................................................................................................... 7
Figure 2- 3 System connection framework................................................................................................................... 9
Figure 3- 1 Pin configuration diagram.........................................................................................................................11
Figure 3- 2 Power supply of the NM1 module............................................................................................................15
Figure 3- 3 SIM card interface application..................................................................................................................16
Figure 3- 4 Reference circuit....................................................................................................................................... 17
Figure 3- 5 Reference circuit....................................................................................................................................... 18
Figure 3- 6 Reference circuit....................................................................................................................................... 18
Figure 3- 7 Reference circuit with a level converter...................................................................................................19
Figure 3- 8 Reference circuit with a triode for level conversion................................................................................ 19
Figure 3- 9 Downloading interface application circuit............................................................................................... 20
Figure 3- 10 PWRKEY interface application circuit.................................................................................................. 20
Figure 3- 11 RESET interface application circuit....................................................................................................... 21
Figure 4- 1 Antenna impedance calculation model.....................................................................................................22
Figure 4- 2 Antenna PCB cabling impedance calculation data...................................................................................23
Figure 5- 1 Recommended stencil strips..................................................................................................................... 24
Figure 5- 2 Over temperature curve............................................................................................................................ 25
Figure 6- 1 Top view (unit: mm)................................................................................................................................. 26
Figure 6- 2 Side view (unit: mm)................................................................................................................................ 26
Figure 6- 3 Transparent view (unit: mm).................................................................................................................... 27
Figure 6- 4 Recommended package size (unit: mm)...................................................................................................28
Tables
Table 1- 1 Reference documents....................................................................................................................................6
Table 1- 2 Acronyms and abbreviations........................................................................................................................ 6
Table 2- 1 Technical parameters of the NM1 module................................................................................................... 8
Table 2- 2 Working frequency bands.............................................................................................................................9
Table 2- 3 Line loss requirements................................................................................................................................10
Table 2- 4 Antenna requirements.................................................................................................................................10
Table 2- 5 Conducted RF transmit power....................................................................................................................10
Table 3- 1 Pin symbols.................................................................................................................................................11
Table 3- 2 Interface pin definition............................................................................................................................... 11
Table 3- 3 Electrical conditions................................................................................................................................... 15
Table 3- 4 Definition and description of SIM card interface signals.......................................................................... 16
Table 3- 5 SPI signal definition................................................................................................................................... 17
Table 3- 6 I 2 C interface signal definition.....................................................................................................................17
Table 3- 7 UART interface signal definition............................................................................................................... 18
Table 3- 8 USB and downloading interface signal definition..................................................................................... 19
Table 3- 9 PWRKEY signal definition........................................................................................................................ 20
Table 3- 10 RESET signal definition...........................................................................................................................21
Table 5- 1 Over temperature curve parameter settings................................................................................................24