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NEO-8Q / NEO-M8 - Hardware integration manual

UBX-15029985 - Production information Contents Page 3 of 4

C1-Public

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