Ublox NEO-M8N, Hardware Integration Manual

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NEO-8Q / NEO-M8 - Hardware integration manual
UBX-15029985 - Production information Contents Page 3 of 4
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Contents
Document information ................................................................................................................................ 2
Contents .......................................................................................................................................................... 3
1 Hardware description ........................................................................................................................... 5
1.1 Overview ........................................................................................................................................................ 5
1.2 Configuration ............................................................................................................................................... 5
1.3 Connecting power ....................................................................................................................................... 5
1.3.1 VCC: Main supply voltage ................................................................................................................. 5
1.3.2 V_BCKP: Backup supply voltage ...................................................................................................... 5
1.3.3 VDD_USB: USB interface power supply ......................................................................................... 6
1.3.4 VCC_RF: Output voltage RF ............................................................................................................. 6
1.4 Interfaces ...................................................................................................................................................... 6
1.4.1 UART ..................................................................................................................................................... 6
1.4.2 USB ........................................................................................................................................................ 7
1.4.3 Display Data Channel (DDC) ............................................................................................................. 7
1.4.4 SPI .......................................................................................................................................................... 8
1.4.5 TX_READY ............................................................................................................................................ 8
1.5 I/O pins ........................................................................................................................................................... 8
1.5.1 RESET_N: Reset .................................................................................................................................. 8
1.5.2 EXTINT: External interrupt ............................................................................................................... 8
1.5.3 SAFEBOOT_N ...................................................................................................................................... 9
1.5.4 D_SEL: Interface select ..................................................................................................................... 9
1.5.5 TIMEPULSE (TIMEPULSE1 on NEO-M8T) .................................................................................... 9
1.5.6 TIMEPULSE2 ....................................................................................................................................... 9
1.5.7 LNA_EN: LNA enable .......................................................................................................................... 9
1.6 Electromagnetic interference on I/O lines ...........................................................................................10
2 Design ..................................................................................................................................................... 11
2.1 Pin description ...........................................................................................................................................11
2.1.1 Pin name changes.............................................................................................................................12
2.2 Minimal design...........................................................................................................................................12
2.3 Layout: Footprint and paste mask ........................................................................................................12
2.4 Antenna .......................................................................................................................................................13
2.4.1 Antenna design with passive antenna .........................................................................................13
2.4.2 Active antenna design .....................................................................................................................15
2.5 Layout design-in: Thermal management .............................................................................................16
3 Migration to u-blox 8 / M8 modules .............................................................................................. 17
3.1 Migrating u-blox 7 designs to NEO-8Q and NEO-M8 series modules ............................................17
3.2 Hardware migration of NEO-6 to NEO-8Q and NEO-M8 series .......................................................17
3.3 Software migration ...................................................................................................................................18
4 Product handling ................................................................................................................................. 19
4.1 Packaging, shipping, storage and moisture preconditioning ..........................................................19