u-blox LEA-5 Series - Contents; Table of Contents

LEA-5, NEO-5, TIM-5H - Hardware Integration Manual
GPS.G5-MS5-09027-A2 Released Contents
Page 5 of 68
Contents
Preface ................................................................................................................................ 3
Contents .............................................................................................................................. 5
1 Hardware description .................................................................................................. 8
1.1 Overview .............................................................................................................................................. 8
1.2 Architecture .......................................................................................................................................... 8
1.3 Power management ............................................................................................................................. 9
1.3.1 Connecting power ........................................................................................................................ 9
1.3.2 Operating modes ........................................................................................................................ 10
1.3.3 V_ANT (LEA-5H/5S/5A, TIM-5H) .................................................................................................. 11
1.4 System functions ................................................................................................................................ 11
1.4.1 EXTINT - –xternal interrupt pin ..................................................................................................... 11
1.4.2 System monitoring ...................................................................................................................... 11
1.5 Interfaces ............................................................................................................................................ 11
1.5.1 UART ........................................................................................................................................... 11
1.5.2 USB (LEA-5, NEO-5) ..................................................................................................................... 12
1.5.3 DDC (LEA-5, NEO-5) .................................................................................................................... 13
1.5.4 SPI (planned with LEA-5Q and NEO-5Q/5G) ................................................................................. 17
1.6 I/O pins ............................................................................................................................................... 22
1.6.1 RESET_N (LEA-5, TIM-5H) ............................................................................................................ 22
1.6.2 EXTINT0 ...................................................................................................................................... 22
1.6.3 AADET_N (LEA-5, TIM-5H) ........................................................................................................... 22
1.6.4 Configuration pins (LEA-5S/5A/5Q/5M, NEO-5) ........................................................................... 22
2 Design-in ..................................................................................................................... 23
2.1 Design-in checklist .............................................................................................................................. 23
2.1.1 Layout design-in checklist ............................................................................................................ 23
2.1.2 Design considerations .................................................................................................................. 25
2.2 LEA-5 design ...................................................................................................................................... 26
2.2.1 LEA-5 passive antenna design ...................................................................................................... 26
2.2.2 Pin description for antenna designs (LEA-5H/5S/5A/5T) ............................................................... 27
2.2.3 Pin description for antenna designs (LEA-5Q/5M) ........................................................................ 28
2.3 NEO-5 design ..................................................................................................................................... 30
2.3.1 Passive antenna design (NEO-5) ................................................................................................... 30