Quectel EC20 User Manual

LTE Module Series
EC20 Mini PCIe Hardware Design
EC20_Mini_PCIe_Hardware_Design Confidential / Released 6 / 36
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 12
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 16
FIGURE 3: REFERENCE DESIGN OF POWER SUPPLY ............................................................................... 17
FIGURE 4: REFERENCE CIRCUIT OF THE 6-PIN USIM CARD .................................................................... 18
FIGURE 5: REFERENCE CIRCUIT OF USB INTERFACE .............................................................................. 19
FIGURE 6: THE DCE-DTE CONNECTION OF UART INTERFACE ................................................................ 21
FIGURE 7: RS232 LEVEL MATCH CIRCUIT .................................................................................................... 21
FIGURE 8: TIMING OF PRIMARY MODE ........................................................................................................ 23
FIGURE 9: TIMING OF AUXILIARY MODE ...................................................................................................... 23
FIGURE 10: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 24
FIGURE 11: RI BEHAVIOR ............................................................................................................................... 25
FIGURE 12: TIMING OF RESETTING MODULE ............................................................................................. 26
FIGURE 13: LED_WWAN# SIGNAL REFERENCE CIRCUIT DIAGRAM ........................................................ 26
FIGURE 14: DIMENSIONS OF THE RF CONNECTOR (UNIT: MM) ............................................................... 27
FIGURE 15: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 27
FIGURE 16: MECHANICAL DIMENSIONS OF EC20 MINI PCIE (UNIT: MM) ................................................. 32
FIGURE 17: STANDARD DIMENSIONS OF MINI PCI EXPRESS (UNIT: MM) ............................................... 33
FIGURE 18: DIMENSIONS OF THE MINI PCI EXPRESS CONNECTOR (UNIT: MM) ................................... 34
Quectel
Confidential

Quectel EC20 Specifications

General

Brand	Quectel
Model	EC20
Category	PCI Card
Language	English