Ublox MAX-7C-0, Manual

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MAX-7 / NEO-7 - Hardware Integration Manual
UBX-13003704 - R09 Production Information Contents
Page 4 of 52
Contents
Preface ................................................................................................................................ 3
Contents .............................................................................................................................. 4
1 Quick reference ............................................................................................................ 7
2 Hardware description .................................................................................................. 8
2.1 Overview .............................................................................................................................................. 8
2.2 Architecture .......................................................................................................................................... 8
2.3 Operating modes .................................................................................................................................. 8
2.3.1 Continuous Mode ......................................................................................................................... 8
2.3.2 Power Save Mode ......................................................................................................................... 9
2.4 Configuration ....................................................................................................................................... 9
2.4.1 Electrical Programmable Fuse (eFuse) ............................................................................................. 9
2.5 Connecting power .............................................................................................................................. 10
2.5.1 VCC: Main supply voltage ........................................................................................................... 10
2.5.2 VCC_IO: IO supply voltage (MAX-7) ............................................................................................ 10
2.5.3 V_BCKP: Backup supply voltage .................................................................................................. 10
2.5.4 VDD_USB: USB interface power supply (NEO-7) ........................................................................... 11
2.5.5 VCC_RF: Output voltage RF section ............................................................................................. 11
2.5.6 V_ANT: Antenna supply (MAX-7W) ............................................................................................. 11
2.6 Interfaces ............................................................................................................................................ 11
2.6.1 UART ........................................................................................................................................... 11
2.6.2 USB ............................................................................................................................................. 11
2.6.3 Display Data Channel (DDC) ........................................................................................................ 12
2.6.4 SPI (NEO-7) .................................................................................................................................. 13
2.7 I/O pins ............................................................................................................................................... 13
2.7.1 RESET_N: Reset input .................................................................................................................. 13
2.7.2 EXTINT: External interrupt ............................................................................................................ 13
2.7.3 D_SEL: Interface select (NEO-7) .................................................................................................... 13
2.7.4 TX Ready signal ........................................................................................................................... 14
2.7.5 ANT_ON: Antenna ON (LNA enable) (NEO-7N, MAX-7Q, MAX-7C) ............................................. 14
2.7.6 Antenna Short circuit detection (MAX-7W) ................................................................................. 14
2.7.7 Antenna open circuit detection ................................................................................................... 14
2.7.8 Time pulse ................................................................................................................................... 14
3 Design ......................................................................................................................... 15
3.1 Design checklist .................................................................................................................................. 15
3.1.1 Schematic checklist ..................................................................................................................... 15