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UMTS/HSPA Module Series

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 46 / 84

3.12. USB Interface

UC20 contains one integrated Universal Serial Bus (USB) transceiver which complies with the USB 2.0
specification and supports high speed (480 Mbps), full speed (12 Mbps) and low speed (1.5 Mbps) mode.
The USB interface is primarily used for AT command, data transmission, GNSS NMEA sentences output,
software debug and firmware upgrade. The following table shows the pin definition of USB interface.

Table 15: USB Pin Description

Pin Name

Pin No.

I/O

Description

Comment

USB_DP

69

IO

USB differential data bus (positive).

Require differential
impedance of 90Ω.

USB_DM

70

IO

USB differential data bus (minus).

Require differential
impedance of 90Ω.

USB_VBUS

71

PI

Used for detecting the USB interface
connected.

3.0~5.25V.
Typical 5.0V.

GND

72

Ground.

More details about the USB 2.0 specifications, please visit http://www.usb.org/home.

The following figure shows the reference circuit of USB interface.

Module

USB_VBUS

USB_DP

USB_DM

GND

USB connector

Close to USB connector

Differential layout

USB_VBUS

USB_DP

USB_DM

GND

ESD Array

NM_2pF

Figure 26: Reference Circuit of USB Application

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Содержание UC20

Страница 1: ...UC20 Hardware Design UMTS HSPA Module Series Rev UC20_Hardware_Design_V1 2 Date 2014 01 13 www quectel com...

Страница 2: ...OVIDED IS BASED UPON CUSTOMERS REQUIREMENTS QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HE...

Страница 3: ...HOU 1 Added UC20 G information 2 Added AMR WB feature 3 Added USB upgrade test points diagram 4 Added reference design of transistor circuit on UART interface 5 Deleted debug function of Debug UART in...

Страница 4: ...2 Pin Assignment 18 3 3 Pin Description 19 3 4 Operating Modes 25 3 5 Power Saving 25 3 5 1 Sleep Mode 25 3 5 1 1 UART Application 26 3 5 1 2 USB Application with Suspend Function 26 3 5 1 3 USB Appl...

Страница 5: ...58 5 1 1 Pin Definition 58 5 1 2 Operating Frequency 58 5 1 3 Reference Design 58 5 2 GNSS Antenna Interface 59 5 2 1 Reference Design for Passive Antenna 60 5 2 2 Reference Design for Active Antenna...

Страница 6: ...UMTS HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential Released 5 84 8 2 Manufacturing and Welding 74 8 3 Packaging 75 9 Appendix A Reference 77...

Страница 7: ...16 PIN DEFINITION OF PCM AND I2C INTERFACE 49 TABLE 17 PIN DEFINITION OF THE ADC 50 TABLE 18 CHARACTERISTIC OF THE ADC 51 TABLE 19 PIN DEFINITION OF NETWORK INDICATOR 51 TABLE 20 WORKING STATE OF THE...

Страница 8: ...RE 19 REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT 40 FIGURE 20 RS232 LEVEL MATCH CIRCUIT 41 FIGURE 21 REFERENCE CIRCUIT OF DEBUG UART WITH LEVEL TRANSLATOR 41 FIGURE 22 REFERENCE CIRCUIT OF THE 8 PIN US...

Страница 9: ...Design Confidential Released 8 84 FIGURE 42 BOTTOM PADS DIMENSIONS BOTTOM VIEW 71 FIGURE 43 RECOMMENDED FOOTPRINT TOP VIEW 72 FIGURE 44 TOP VIEW OF THE MODULE 73 FIGURE 45 BOTTOM VIEW OF THE MODULE 73...

Страница 10: ...odule and describes its hardware interface which are connected with your application and the air interface This document can help you quickly understand module interface specifications electrical and...

Страница 11: ...s devices on boarding the aircraft if your device offers a Airplane Mode which must be enabled prior to boarding an aircraft Switch off your wireless device when in hospitals or clinics or other healt...

Страница 12: ...ts for M2M application such as automotive metering tracking system security solutions routers wireless POS mobile computing devices PDA phone and tablet PC etc UC20 is an SMD type module which can be...

Страница 13: ...talled and operated with minimum distance 20cm between the radiator and your body as well as kept minimum 20cm from radio antenna depending on the Mobile status of this module usage This module should...

Страница 14: ...t both 16 QAM and QPSK modulation Internet Protocol Features Support TCP PPP UDP protocols Support the protocols PAP Password Authentication Protocol and CHAP Challenge Handshake Authentication Protoc...

Страница 15: ...tion data transmission GNSS NMEA output software debug and firmware upgrade USB Driver Windows XP Windows Vista Windows 7 Windows 8 Windows CE5 0 6 0 Linux 2 6 3 0 Android 2 3 4 0 Rx diversity Support...

Страница 16: ...ctional Diagram The following figure shows a block diagram of UC20 and illustrates the major functional parts Power management Baseband DDR NAND flash Radio frequency Peripheral interface UART interfa...

Страница 17: ...US ADC PCM UART VBAT_BB USB ANT_DIV VBAT_RF VDD_EXT GSM UMTS RF Switch VDD_2V85 WAKEUP_IN VRTC SLEEP_IND W_DISABLE NAND Flash Figure 1 Functional Diagram 2 5 Evaluation Board In order to help you to d...

Страница 18: ...ption UC20 is equipped with a 72 pin 1 3mm pitch SMT pads plus 40 pin ground pads and reserved pads that connect to cellular application platform Sub interfaces included in these pads are described in...

Страница 19: ...ND RESET_N PWRKEY AGND RESERVED PCM_IN PCM_OUT PCM_SYNC PCM_CLK RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED VDD_2V85 ANT_DIV GND GND USB_VBUS USB_DM USB_DP RXD TXD DTR RTS CTS DCD RI STATUS...

Страница 20: ...drain Table 4 Pin Description Power Supply Pin Name Pin No I O Description DC Characteristics Comment VBAT_BB 59 60 PI Power supply for module baseband part Vmax 4 3V Vmin 3 4V Vnorm 3 8V It must be...

Страница 21: ...RPU 200k VIHmax 2 1V VIHmin 1 3V VILmax 500mV Pull up to 1 8V internally RESET_N 20 DI Reset the module RPU 200k VIHmax 2 1V VIHmin 1 3V VILmax 500mV Pull up to 1 8V internally Active low Status Indi...

Страница 22: ...I O Description DC Characteristics Comment USIM_GND 10 Specified ground for USIM card USIM_VDD 14 PO Power supply for USIM card For 1 8V USIM Vmax 1 98V Vmin 1 62V For 3 0V USIM Vmax 3 3V Vmin 2 7V IO...

Страница 23: ...range 0 2V to 2 1V ADC1 44 AI General purpose analog to digital converter Voltage range 0 2V to 4 2V Main UART Interface Pin Name Pin No I O Description DC Characteristics Comment RI 62 DO Ring indica...

Страница 24: ...pedance ANT_MAIN 49 IO Main antenna 50 impedance ANT_GNSS 47 AI GNNS antenna 50 impedance PCM Interface Pin Name Pin No I O Description DC Characteristics Comment PCM_IN 24 DI PCM data input VILmin 0...

Страница 25: ...cription DC Characteristics Comment WAKEUP_ IN 1 DI Sleep mode control VILmin 0 3V VILmax 0 6V VIHmin 1 2V VIHmax 2 0V 1 8V power domain Pull up by default Low level wakes up the module W_DISABL E 4 D...

Страница 26: ...and data transfer rate Minimum Functionality Mode AT CFUN command can set the module entering into a minimum functionality mode without removing the power supply In this case both RF function and USIM...

Страница 27: ...e is used to wake up the processor and AP_READY will detect the sleep state of processor can be configured to high level or low level detection You should pay attention to the level match shown in dot...

Страница 28: ...ume state the module will be woken up 3 5 1 3 USB Application without Suspend Function If application processor communicates with module via USB interface and processor does not support USB suspend fu...

Страница 29: ...mode the RF function does not work and all AT commands correlative with RF function will be not accessible This mode can be set with the following way Hardware The W_DISABLE pin is pulled up by defaul...

Страница 30: ...t 3 4 3 8 4 3 V GND 8 9 19 36 46 48 50 54 56 72 85 112 Ground 0 V 3 6 2 Decrease Voltage Drop The power supply range of the module is 3 4V 4 3V Because of the voltage drop during the transmitting time...

Страница 31: ...2mm and the principle of the VBAT trace is the longer the wider 3 6 3 Reference Design for Power Supply The power design for the module is very important since the performance of power supply for the...

Страница 32: ...down mode it can be turned on to normal mode by driving the PWRKEY pin to a low level at least 100ms It is recommended to use an open drain collector driver to control the PWRKEY You can monitor the...

Страница 33: ...dule Series UC20 Hardware Design UC20_Hardware_Design Confidential Released 32 84 PWRKEY S1 Close to S1 TVS Figure 9 Turn on the Module Using Keystroke The turn on scenarios is illustrated as the foll...

Страница 34: ...Turn off Module The following procedures can be used to turn off the module Normal power down procedure Turn off the module using the PWRKEY pin Normal power down procedure Turn off the module using c...

Страница 35: ...ta loss If logging off is not done within 60s module will shut down internal power supply forcibly After that moment the module enters the power down mode no other AT commands can be executed and only...

Страница 36: ...ised by command AT QCFG vbatt refer to document 1 for details 3 8 Reset the Module The RESET_N can be used to reset the module Table 8 RESET_N Pin Description Pin Name Pin No Description DC Characteri...

Страница 37: ...0ms Figure 12 Reference Circuit of RESET_N by Using Driving Circuit RESET_N S2 Close to S2 TVS Figure 13 Reference Circuit of RESET_N by Using Button The reset scenario is illustrated as the following...

Страница 38: ...is powered down and there is no power supply for the VBAT It is also available to charge the battery on the VRTC when module is turned on You can choose rechargeable battery capacitor or non recharge...

Страница 39: ...e used for data transmission AT communication or firmware upgrade Debug UART interface supports 115200bps It can be used for GNSS NMEA sentences output USB interface supports software debug and firmwa...

Страница 40: ...D 12 DO Transmit data 1 8V power domain DBG_RXD 11 DI Receive data 1 8V power domain The logic levels are described in the following table Table 11 Logic Levels of Digital I O Parameter Min Max Unit V...

Страница 41: ...efer to the construction of solid line Please pay attention to direction of connection Input dotted line of module should refer to input solid line of the module Output dotted line of module should re...

Страница 42: ...rovided by Texas Instruments is recommended VCCA VCCB OE A1 A2 GND B1 B2 VDD_EXT DBG_TXD DBG_RXD 0 1uF 0 1uF DBG_TXD_3 3V DBG_RXD_3 3V VDD_3 3V TXB0102DCU Figure 21 Reference Circuit of Debug UART wit...

Страница 43: ...upported by the module automatically USIM_DATA 15 IO Data signal of USIM card Pull up to USIM_VDD with 15k resistor internally USIM_CLK 16 DO Clock signal of USIM card USIM_RST 17 DO Reset signal of U...

Страница 44: ...iterion in the USIM circuit design Keep layout of USIM card as close as possible to the module Assure the length of the trace is less than 200mm Keep USIM card signal away from RF and VBAT alignment A...

Страница 45: ...228 Please visit http www molex com for more information Figure 24 Molex 91228 USIM Connector Table 13 Pin Description of Molex USIM Connector Name Pin Function VDD C1 USIM card power supply RST C2 US...

Страница 46: ...phenol C707 10M006 512 2 Please visit http www amphenol com for more information Figure 25 Amphenol C707 10M006 512 2 USIM Card Connector Table 14 Pin Description of Amphenol USIM Connector Name Pin F...

Страница 47: ...of USB interface Table 15 USB Pin Description Pin Name Pin No I O Description Comment USB_DP 69 IO USB differential data bus positive Require differential impedance of 90 USB_DM 70 IO USB differentia...

Страница 48: ...ay attention to the influence of junction capacitance of ESD component on USB data lines Typically the capacitance value should be less than 2pF e g ESD9L5 0ST5G Keep the ESD components as closer to t...

Страница 49: ...n the falling edge of the PCM_CLK and transmitted on the rising edge while the PCM_SYNC rising edge represents the MSB In this mode PCM interface operates with a 128kHz PCM_CLK and an 8kHz 50 duty cyc...

Страница 50: ...V power domain PCM_OUT 25 DO PCM data output 1 8V power domain PCM_SYNC 26 IO PCM data frame sync signal 1 8V power domain PCM_CLK 27 IO PCM data bit clock 1 8V power domain I2C_SCL 41 DO I2C serial c...

Страница 51: ...2 UC20 work as a master device pertaining to I2C interface 3 14 ADC Function The module provides two analog to digital converters ADC to digitize the analog signal to 15 bit digital data such as batte...

Страница 52: ...ODE and NET_STATUS The following tables describe pin definition and logic level changes in different network status Table 19 Pin Definition of Network Indicator Pin Name Pin No I O Description Comment...

Страница 53: ...indicating the module operation status You can connect it to a GPIO of DTE with pulled up or as LED indication circuit as below When the module is turned on normally the STATUS will present the low st...

Страница 54: ...for judging whether the module is in sleep mode or not When the module enters into the sleep mode the SLEEP_IND will output a logic high level So you can use the SLEEP_IND for low current indication...

Страница 55: ...ior No matter which port URC is presented on URC will trigger the behavior on RI pin URC can be output from UART port USB AT port and USB modem port by command AT QURCCFG The default port is USB AT po...

Страница 56: ...mm gpsOneXTRA technology one kind of A GNSS which will download XTRA file from the internet server to enhance the TTFF XTRA file contains predicted GPS and GLONASS satellites coordinates and clock bia...

Страница 57: ...32 s XTRA enabled 22 s Warm start open sky Autonomous 29 s XTRA enabled 3 s Hot start open sky Autonomous 2 5 s XTRA enabled 2 s Accuracy GNSS CEP 50 Autonomous open sky 1 5 m 1 Tracking sensitivity...

Страница 58: ...GNSS antenna and the main UMTS antenna Noisy digital circuits such as the USIM card USB interface Camera module Display connector and SD card should be away from the antenna Use ground vias around th...

Страница 59: ...Rx diversity antenna pins definition are shown below Table 25 Pin Definition of the RF Antenna Pin Name Pin No I O Description Comment ANT_MAIN 49 IO Main antenna 50 impedance ANT_DIV 35 AI Diversity...

Страница 60: ...f Antenna Interface Keep a proper distance between main antenna and diversity antenna to improve the receiving sensitivity 5 2 GNSS Antenna Interface The following tables show the GNSS antenna pin def...

Страница 61: ...ble 28 GNSS Frequency Type Frequency Unit GPS 1575 42 1 023 MHz GLONASS 1597 5 1605 8 MHz 5 2 1 Reference Design for Passive Antenna Passive antenna MAX2659 Module ANT_GNSS SHDN GND RFIN GND RFOUT VCC...

Страница 62: ...ded LNA chip You can disable LNA to save power with one GPIO shown in above figure Pay attention to this pin s voltage level 3 VDD supplies power for active antenna You can choose the right VDD accord...

Страница 63: ...ntenna noise figure 1 5dB Active antenna gain 2dBi Active antenna embedded LNA gain 20dB Typ Active antenna total gain 18dBi Typ 5 3 2 Install the Antenna with RF Connector The following figure is the...

Страница 64: ...rdware_Design Confidential Released 63 84 Figure 38 Mechanicals of UF L LP Connectors The following figure describes the space factor of mated connector Figure 39 Space Factor of Mated Connector Unit...

Страница 65: ...Absolute maximum ratings for power supply and voltage on digital and analog pins of module are listed in the following table Table 30 Absolute Maximum Ratings Parameter Min Max Unit VBAT_RF VBAT_BB 0...

Страница 66: ...rating Temperature The operating temperature is listed in the following table Table 32 Operating Temperature Parameter Min Typ Max Unit Normal Temperature 35 25 75 C Restricted Operation1 40 35 75 85...

Страница 67: ...sconnected DRX 6 14 0 mA Idle USB connected DRX 6 33 4 mA WCDMA data transfer GNSS off UMTS Band I HSDPA max power 517 mA UMTS Band I HSUPA max power 497 mA UMTS Band II HSDPA max power 521 mA UMTS Ba...

Страница 68: ...Sensitivity The following table shows the conducted RF receiving sensitivity of UC20 module Table 35 Conducted RF Receiving Sensitivity Frequency Receive Sensitivity Typ UMTS 1900 110dBm UMTS 850 110d...

Страница 69: ...are Design UC20_Hardware_Design Confidential Released 68 84 Table 36 Electrostatics Discharge Characteristics Tested Points Contact Discharge Air Discharge Unit VBAT GND 5 10 kV All antenna interfaces...

Страница 70: ...are_Design Confidential Released 69 84 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module All dimensions are measured in mm 7 1 Mechanical Dimensions of the Module...

Страница 71: ...Hardware Design UC20_Hardware_Design Confidential Released 70 84 3 4 3 2 3 4 3 2 3 4 3 2 4 8 32 29 0 5 1 5 Figure 41 UC20 Bottom Dimensions Bottom View XXXX in pink on above figure is the PCB board co...

Страница 72: ...UMTS HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential Released 71 84 Figure 42 Bottom Pads Dimensions Bottom View...

Страница 73: ...1 9 7 8 13 1 9 9 04 9 3 6 45 3 45 4 4 22 1 6 16 29 0 8 1 3 4 8 2 3 4 6 2 5 1 0 3 4 6 8 Figure 43 Recommended Footprint Top View 1 Keep out the area below the test point circular area on the above figu...

Страница 74: ...Module Series UC20 Hardware Design UC20_Hardware_Design Confidential Released 73 84 7 3 Top View of the Module Figure 44 Top View of the Module 7 4 Bottom View of the Module Figure 45 Bottom View of t...

Страница 75: ...ore than 72 hours at factory conditions of o30 C 60 RH If baking is required devices may be baked for 48 hours at 125 C 5 C As plastic container cannot be subjected to high temperature Module needs to...

Страница 76: ...d that the module should be mounted after the first panel has been reflowed The following picture is the actual diagram which we have operated Time 50 100 150 200 250 300 50 100 150 200 250 160 C 200...

Страница 77: ...fidential Released 76 84 30 3 0 15 29 3 0 15 30 3 0 15 32 5 0 15 33 5 0 15 0 35 0 05 4 2 0 15 3 1 0 15 32 5 0 15 33 5 0 15 4 00 0 1 2 00 0 1 1 75 0 1 20 20 0 15 44 00 0 3 44 00 0 1 1 50 0 1 Direction...

Страница 78: ...gn UC20 and M10 Compatible Reference Design 5 UC20 M10_Compatibilty_Design UC20 and M10 Compatibility Design Specification 6 Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide 7 UC20_GNSS...

Страница 79: ...nikovaya Sistema the Russian Global Navigation Satellite System GMSK Gaussian Minimum Shift Keying GNSS Global Navigation Satellite System GPS Global Positioning System GSM Global System for Mobile Co...

Страница 80: ...an Square value RTC Real Time Clock Rx Receive SIM Subscriber Identification Module SMS Short Message Service TDMA Time Division Multiple Access TE Terminal Equipment TX Transmitting Direction UART Un...

Страница 81: ...n Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value VOHmin Minimum Output High...

Страница 82: ...UMTS HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential Released 81 84...

Страница 83: ...UMTS HSPA Module UC20 Hardware Design UC20_Hardware_Design Confidential Released 82 84...

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