Quectel UC20

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 5 / 32
Figure Index
FIGURE 1: SYSTEM OVERVIEW ....................................................................................................................... 9
FIGURE 2: EVB TOP VIEW ............................................................................................................................... 11
FIGURE 3: EVB ACCESSORIES ...................................................................................................................... 12
FIGURE 4: SIMPLIFIED POWER SUPPLY SCHEMATIC ................................................................................ 13
FIGURE 5: POWER INTERFACE ..................................................................................................................... 14
FIGURE 6: POWER PLUG ................................................................................................................................ 14
FIGURE 7: CIRCUIT OF USB INTERFACE ...................................................................................................... 15
FIGURE 8: AUDIO CODEC CIRCUIT ............................................................................................................... 16
FIGURE 9: LOUD SPEAKER CIRCUIT ............................................................................................................ 16
FIGURE 10: EARPHONE CIRCUIT .................................................................................................................. 17
FIGURE 11: PIN ASSIGNMENT OF J601 ......................................................................................................... 17
FIGURE 12: THE SKETCH OF AUDIO PLUG .................................................................................................. 18
FIGURE 13: HANDSET CIRCUIT ..................................................................................................................... 18
FIGURE 14: SIMPLIFIED USIM CARD INTERFACE SCHEMATIC ................................................................. 19
FIGURE 15: PINS ASSIGNMENT OF USIM CARD HOLDER .......................................................................... 20
FIGURE 16: UART BLOCK DIAGRAM ............................................................................................................. 21
FIGURE 17: MAIN UART PORT (J401) ............................................................................................................ 22
FIGURE 18: SWITCH AND BUTTONS ............................................................................................................. 23
FIGURE 19: STATUS LEDS .............................................................................................................................. 24
FIGURE 20: TEST POINTS J806 AND J807 .................................................................................................... 25
FIGURE 21: TEST POINTS J804 ...................................................................................................................... 25
FIGURE 22: SELECT THE USB DM PORT TO UPDATE FIRMWARE ............................................................ 30
FIGURE 23: UMTS&LTE EVB AND ACCESSORIES EQUIPMENT ................................................................. 31
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