Quectel L10, Hardware Design

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L10 Hardware Design
Figure Index
FIGURE 1: MODULE FUNCTIONAL DIAGRAM ............................................................................. 11
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26 FIGURE 2: REFERENCE RESET CIRCUIT USING OC CIRCUIT ...................................................
FIGURE 3: REFERENCE RESET CIRCUIT USING BUTTON..........................................................
FIGURE 4: TIMING OF RESTART SYSTEM .....................................................................................
FIGURE 5: RTC SUPPLY FROM NON-CHARGEABLE BATTERY OR CAPACITOR....................
FIGURE 6: REFERENCE CHARGING CIRCUIT FOR CHARGEABLE BATTERY........................
FIGURE 7: SEIKO XH414H-IV01E CHARGE CHARACTERISTIC .................................................
FIGURE 8: CONNECTION OF SERIAL INTERFACES .....................................................................
FIGURE 9: RS-232 LEVEL SHIFT CIRCUIT ......................................................................................
FIGURE 10: USB INTERFACE CIRCUIT ...........................................................................................
FIGURE 11: EXTERNAL DETECT CIRCUIT FOR OPEN-CIRCUIT OF ACTIVE ANTENNA ......
FIGURE 12: REFERENCE DESIGN FOR PASSIVE ANTENNA.......................................................
FIGURE 13: ACTIVE ANTENNA BIASING .......................................................................................
FIGURE 14: ACTIVE ANTENNA WITH VCC_RF .............................................................................
FIGURE 15: ACTIVE ANTENNA WITH EXTERNAL LDO ..............................................................
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