Quectel Wireless Solutions 201312UC20 User Manual

UC20 Hardware Design

UMTS/HSPA Module Series

Rev. UC20_Hardware_Design_V1.2

Date: 2014-01-13

www.quectel.com

UMTS/HSPA Module Series

UC20 Hardware Design

Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters:

Quectel Wireless Solutions Co., Ltd.

Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233

Tel: +86 21 5108 6236

Mail: info@quectel.com

Or our local office, for more information, please visit:

http://www.quectel.com/support/salesupport.aspx

For technical support, to report documentation errors, please visit:

http://www.quectel.com/support/techsupport.aspx

GENERAL NOTES

QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION

PROVIDED 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 HEREIN, AND DOES NOT ACCEPT

ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR

RELIANCE UPON THE INFORMATION. THE INFORMATION SUPPLIED HEREIN IS SUBJECT TO

CHANGE WITHOUT PRIOR NOTICE.

COPYRIGHT

THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF

QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS

DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT

PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS

ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL

OR DESIGN.

UC20_Hardware_Design Confidential / Released 1 / 84

UMTS/HSPA Module Series

Revision

Date

Author

Description

1.0

2013-07-17

Mountain ZHOU

Initial

1.1

2013-08-29

Mountain ZHOU

1. Updated USB driver information.

2. Added GNSS contents in Chapter 4.

3. Added GNSS current consumption.

4. Updated GNSS antenna requirements.

5. Released USIM_PRESENCE function.

1.2

2014-01-13

Mountain ZHOU

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

interface.

6. Released AP_READY, UART upgrade

function and Rx-diversity function.

7. Modified UC20-A frequency bands.

8. Modified W_DISABLE# definition.

9. Modified USIM pin’s electrical characteristics.

10. Modified GNSS sensitivity definition.

11. Modified turning on timing figure.

12. Updated the sleep application in Chapter

3.5.1 and airplane mode in Chapter 3.5.2.

13. Updated I2C pins definition.

14. Updated current consumption.

UC20 Hardware Design

About the Document

History

UC20_Hardware_Design Confidential / Released 2 / 84

UMTS/HSPA Module Series

UC20 Hardware Design

Table Index

TABLE 1: UC20 SERIES FREQUENCY BANDS ............................................................................................... 11

TABLE 2: UC20 KEY FEATURES ..................................................................................................................... 13

TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 19

TABLE 4: PIN DESCRIPTION ........................................................................................................................... 19

TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 25

TABLE 6: VBAT AND GND PINS ....................................................................................................................... 29

TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 31

TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 35

TABLE 9: PIN DEFINITION OF THE MAIN UART INTERFACE ....................................................................... 38

TABLE 10: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 39

TABLE 11: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 39

TABLE 12: PIN DEFINITION OF THE USIM INTERFACE ............................................................................... 42

TABLE 13: PIN DESCRIPTION OF MOLEX USIM CONNECTOR ................................................................... 44

TABLE 14: PIN DESCRIPTION OF AMPHENOL USIM CONNECTOR ........................................................... 45

TABLE 15: USB PIN DESCRIPTION ................................................................................................................ 46

TABLE 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 NETWORK INDICATOR..................................................................... 51

TABLE 21: PIN DEFINITION OF STATUS ........................................................................................................ 52

TABLE 22: PIN DEFINITION OF SLEEP_IND .................................................................................................. 53

TABLE 23: BEHAVIOR OF THE RI ................................................................................................................... 54

TABLE 24: GNSS PERFORMANCE ................................................................................................................. 56

TABLE 25: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 58

TABLE 26: THE MODULE OPERATING FREQUENCIES ................................................................................ 58

TABLE 27: PIN DEFINITION OF GNSS ANTENNA .......................................................................................... 59

TABLE 28: GNSS FREQUENCY ....................................................................................................................... 60

TABLE 29: ANTENNA REQUIREMENTS .......................................................................................................... 62

TABLE 30: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 64

TABLE 31: THE MODULE POWER SUPPLY RATINGS .................................................................................. 65

TABLE 32: OPERATING TEMPERATURE ........................................................................................................ 65

TABLE 33: THE MODULE CURRENT CONSUMPTION .................................................................................. 66

TABLE 34: CONDUCTED RF OUTPUT POWER ............................................................................................. 67

TABLE 35: CONDUCTED RF RECEIVING SENSITIVITY ................................................................................ 67

TABLE 36: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 68

TABLE 37: RELATED DOCUMENTS ................................................................................................................ 77

TABLE 38: TERMS AND ABBREVIATIONS ...................................................................................................... 77

UC20_Hardware_Design Confidential / Released 6 / 84

UMTS/HSPA Module Series

UC20 Hardware Design

Figure Index

FIGURE 1: FUNCTIONAL DIAGRAM ........................................................................................................ 16

FIGURE 2: PIN ASSIGNMENT (TOP VIEW)............................................................................................. 18

FIGURE 3: UART SLEEP APPLICATION .................................................................................................. 26

FIGURE 4: USB APPLICATION WITH SUSPEND FUNCTION ................................................................ 27

FIGURE 5: USB SLEEP APPLICATION WITHOUT SUSPEND FUNCTION ............................................ 28

FIGURE 6: STAR STRUCTURE OF THE POWER SUPPLY .................................................................... 30

FIGURE 7: REFERENCE CIRCUIT OF POWER SUPPLY ....................................................................... 30

FIGURE 8: TURN ON THE MODULE USING DRIVING CIRCUIT ........................................................... 31

FIGURE 9: TURN ON THE MODULE USING KEYSTROKE .................................................................... 32

FIGURE 10: TIMING OF TURNING ON MODULE ................................................................................... 33

FIGURE 11: TIMING OF TURNING OFF MODULE .................................................................................. 34

FIGURE 12: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT .............................. 36

FIGURE 13: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON .............................................. 36

FIGURE 14: TIMING OF RESETTING MODULE ...................................................................................... 36

FIGURE 15: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ........................................................ 37

FIGURE 16: RTC SUPPLY FROM RECHARGEABLE BATTERY ............................................................ 37

FIGURE 17: RTC SUPPLY FROM CAPACITOR ....................................................................................... 38

FIGURE 18: REFERENCE CIRCUIT WITH TRANSLATOR CHIP............................................................ 40

FIGURE 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 USIM CARD ........................................................... 42

FIGURE 23: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ........................................................... 43

FIGURE 24: MOLEX 91228 USIM CONNECTOR .................................................................................... 44

FIGURE 25: AMPHENOL C707 10M006 512 2 USIM CARD CONNECTOR ........................................... 45

FIGURE 26: REFERENCE CIRCUIT OF USB APPLICATION ................................................................. 46

FIGURE 27: TEST POINTS OF FIRMWARE UPGRADE ......................................................................... 47

FIGURE 28: PRIMARY MODE TIMING ..................................................................................................... 48

FIGURE 29: AUXILIARY MODE TIMING ................................................................................................... 49

FIGURE 30: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC ............................ 50

FIGURE 31: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .................................................. 52

FIGURE 32: REFERENCE CIRCUIT OF THE STATUS............................................................................ 53

FIGURE 33: REFERENCE CIRCUIT OF THE SLEEP_IND ..................................................................... 54

FIGURE 34: REFERENCE CIRCUIT OF ANTENNA INTERFACE ........................................................... 59

FIGURE 35: REFERENCE CIRCUIT OF GNSS PASSIVE ANTENNA ..................................................... 60

FIGURE 36: REFERENCE CIRCUIT OF GNSS ACTIVE ANTENNA ....................................................... 61

FIGURE 37: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ........................................ 62

FIGURE 38: MECHANICALS OF UF.L-LP CONNECTORS ..................................................................... 63

FIGURE 39: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ................................................... 63

FIGURE 40: UC20 TOP AND SIDE DIMENSIONS ................................................................................... 69

FIGURE 41: UC20 BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................ 70

UC20_Hardware_Design Confidential / Released 7 / 84

UMTS/HSPA Module Series

UC20 Hardware Design

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

FIGURE 46: LIQUIDS TEMPERATURE .................................................................................................... 75

FIGURE 47: CARRIER TAPE .................................................................................................................... 76

UC20_Hardware_Design Confidential / Released 8 / 84

UMTS/HSPA Module Series

UC20 Hardware Design

1 Introduction

This document defines the UC20 module 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

mechanical details. Associated with application notes and user guide, you can use UC20 module to

design and set up mobile applications easily.

UC20_Hardware_Design Confidential / Released 9 / 84

UMTS/HSPA Module Series

Full attention must be given to driving at all times in order to reduce the risk of an

accident. Using a mobile while driving (even with a handsfree kit) cause distraction

and can lead to an accident. You must comply with laws and regulations restricting

the use of wireless devices while driving.

Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it

switched off. The operation of wireless appliances in an aircraft is forbidden to

prevent interference with communication systems. Consult the airline staff about

the use of wireless 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 health care facilities. These requests are desinged to prevent possible interference with sentitive medical equipment.

GSM cellular terminals or mobiles operate over radio frequency signal and cellular

network and cannot be guaranteed to connect in all conditions, for example no

mobile fee or an invalid SIM card. While you are in this condition and need

emergent help, please remember using emergency call. In order to make or

receive call, the cellular terminal or mobile must be switched on and in a service

area with adequate cellular signal strength.

Your cellular terminal or mobile contains a transmitter and receiver. When it is ON ,

it receives and transmits radio frequency energy. RF interference can occur if it is

used close to TV set, radio, computer or other electric equipment.

In locations with potencially explosive atmospheres, obey all posted signs to turn

off wireless devices such as your phone or other cellular terminals. Areas with

potencially exposive atmospheres including fuelling areas, below decks on boats,

fuel or chemical transfer or storage facilities, areas where the air contains

chemicals or particles such as grain, dust or metal powders.

UC20 Hardware Design

1.1. Safety Information

The following safety precautions must be observed during all phases of the operation, such as usage,

service or repair of any cellular terminal or mobile incorporating UC20 module. Manufacturers of the cellular

terminal should send the following safety information to users and operating personnel and to incorporate

these guidelines into all manuals supplied with the product. If not so, Quectel does not take on any liability

for customer failure to comply with these precautions.

UC20_Hardware_Design Confidential / Released 10 / 84

UMTS/HSPA Module Series

Module

GSM

850

EGSM

900

DCS

1800

PCS

1900

UMTS

800

UMTS

850

UMTS

900

UMTS

1900

UMTS

2100

Rx-

diversity

GNSS

UC20



 



UC20 Hardware Design

2 Product Concept

2.1. General Description

UC20 is an embedded HSPA+ engine with Rx-diversity. Its UMTS-based modem provides data

connectivity on HSPA+, HSDPA, HSUPA, WCDMA, networks. It can also provide GPS/GLONASS and

voice functionality for customers’ specific application. UC20 offers a maximum data rate of 14.4Mbps on

downlink and 5.76Mbps on uplink in HSPA+/HSPA mode.

Table 1: UC20 Series Frequency Bands

With a tiny profile of 32.0mm × 29.0mm × 2.5mm, UC20 can meet almost all requirements 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 embedded in application through its 112-pin pads including

72 LCC signal pads and 40 other pads.

UC20 is integrated with internet service protocols like TCP/UDP and PPP. Extended AT commands have

been developed for customer to use these internet service protocols easily.

2.2. Directives and Standards

The UC20 module is designed to comply with the FCC statements. FCC ID: XMR-201312UC20

The Host system using UC20, should have label indicated FCC ID: XMR-201312UC20.

UC20_Hardware_Design Confidential / Released 11 / 84

UMTS/HSPA Module Series

Part Number

Frequency

Range (MHz)

Peak Gain

(XZ-V)

Average Gain

(XZ-V)

VSWR

Impedance

3R007A

UMTS1900:1850~1990

UMTS850:824-894

1 dBi typ.

3 max

50Ω

UC20 Hardware Design

2.2.1. FCC Statement

1. This device complies with Part 15 of the FCC rules. Operation is subject to the following conditions:

a) This device may not cause harmful interference.

b) This device must accept any interference received, including interference that may cause undesired

operation.

2. Changes or modifications not expressly approved by the party responsible for compliance could

void the user’s authority to operate the equipment.

2.2.2. FCC Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.

This equipment should be installed 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 NOT be installed and operating simultaneously with other radio.

The manual of the host system, which uses UC20, must include RF exposure warning statement to

advice user should keep minimum 20cm from the radio antenna of UC20 module depending on the

Mobile status.

Note: If a portable device (such as PDA) uses UC20 module, the device needs to do permissive change

and SAR testing.

The following list of antenna is indicating the maximum permissible antenna gain.

2.3. Key Features

The following table describes the detailed features of UC20 module.

UC20_Hardware_Design Confidential / Released 12 / 84

UMTS/HSPA Module Series

Feature

Details

Power Supply

Supply voltage: 3.4V~4.3V

Typical supply voltage: 3.8V

Frequency Bands

UC20-A: UMTS850/1900

Transmission Data

HSPA R6: Max 14.4Mbps (DL)/Max 5.76Mbps (UL)

UMTS R99: Max 384kbps (DL)/Max 384kbps (UL)

CSD: 14.4kbps

Transmitting Power

Class 3 (22.5dBm+1/-1dB) for UMTS 850/1900/

HSPA and UMTS Features

HSPA data rate is corresponded with 3GPP R6. 14.4Mbps on downlink

and 5.76Mbps on uplink.

WCDMA data rate is corresponded with 3GPP R99/R4. 384kbps on

downlink and 384kbps on uplink.

Support 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 Protocol) usually used

for PPP connections.

SMS

Text and PDU mode

Point to point MO and MT

SMS cell broadcast

SMS storage: ME by default

USIM Interface

Support USIM/SIM card: 1.8V, 3.0V

Audio Features

Support one digital audio interface: PCM interface

WCDMA: AMR/AMR-WB

Echo cancellation and noise suppression

PCM Interface

Used for audio function with external codec.

Support 8-bit A-law, μ-law and 16-bit linear data formats.

Support long frame sync and short frame sync.

Support master and slave mode, but must be the master in long frame

sync.

UART Interface

Support two UART interfaces: main UART interface and debug UART

interface

UC20 Hardware Design

Table 2: UC20 Key Features

UC20_Hardware_Design Confidential / Released 13 / 84

UMTS/HSPA Module Series

“1)” means when the module works within this temperature range, RF performance might degrade. For

example, the frequency error or the phase error would increase.

Main UART interface:

 Seven lines on main UART interface  Support RTS and CTS hardware flow control  Baud rate can reach up to 921600bps, 115200bps by default  Used for AT command, data transmission or firmware upgrade  Multiplexing function

Debug UART interface:

 Two lines on debug UART interface: DBG_TXD and DBG_RXD  Can be used for GNSS NMEA sentences output

USB Interface

Compliant with USB 2.0 specification (slave only), the data transfer

rate can reach up to 480Mbps.

Used for AT command communication, 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 UMTS Rx-diversity

GNSS Features

Gen8 of Qualcomm GNSS engine (GPS and GLONASS)

Protocol: NMEA 0183

AT Commands

Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT

commands.

Real Time Clock

Implemented

Network Indication

Two pins including NET_MODE and NET_STATUS to indicate

network connectivity status.

Antenna Interface

Include main UMTS antenna, UMTS diversity antenna, GNSS antenna

(passive).

Physical Characteristics

Size: 32.0±0.15 × 29.0±0.15 × 2.5±0.2mm

Weight: approx. 4.9g

Temperature Range

Normal operation: -35°C ~ +75°C

Restricted operation: -40°C ~ -35°C and +75°C ~ +85°C 1)

Storage temperature: -45°C ~ +90°C

Firmware Upgrade

USB interface (by default) or main UART interface.

RoHS

All hardware components are fully compliant with EU RoHS directive.

NOTE

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 14 / 84

UMTS/HSPA Module Series

UC20 Hardware Design

2.4. Functional 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 interface

--USIM card interface

--USB interface

--PCM interface

--ADC interface

--Status indication

--Control interface

UC20_Hardware_Design Confidential / Released 15 / 84

UMTS/HSPA Module Series

PWRKEY

RESET_N

32kHz

19.2MHz

Power

Management Unit

Baseband

RF Transceiver

GNSS Receiver

ANT_GNSS

RF

Switch

DDR RAM/

ANT_MAIN

USIM

STATUS

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

UC20 Hardware Design

2.5. Evaluation Board

In order to help you to develop applications with UC20, Quectel supplies an evaluation board (EVB),

RS-232 to USB cable, USB data cable, power adapter, earphone, antenna and other peripherals to

control or test the module. For details, please refer to document [2].

UC20_Hardware_Design Confidential / Released 16 / 84

Figure 1: Functional Diagram

UMTS/HSPA Module Series

UC20 Hardware Design

3 Application Interface

3.1. General Description

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 detail in

the following chapters:

 Power supply  UART interface  USIM interface  USB interface  PCM interface  ADC interface  Status indication

UC20_Hardware_Design Confidential / Released 17 / 84

UMTS/HSPA Module Series

35

36

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

1

3

4

5

6

7

2

WAKEUP_IN

AP_READY

SLEEP_IND

W_DISABLE#

NET_MODE

NET_STATUS

VDD_EXT

GND

DBG_RXD

DBG_TXD

USIM_PRESENCE

USIM_VDD

USIM_DATA

USIM_CLK

USIM_RST

VRTC

8

9

10

11

12

13

14

15

16

17

18

19

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

72

71

70

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

USIM_GND

GND

RESET_N

PWRKEY

AGND

RESERVED

PCM_IN

PCM_OUT

PCM_SYNC

PCM_CLK

RESERVED

VDD_2V85

ANT_DIV

GND

USB_VBUS

USB_DM

USB_DP

RXD

TXD

DTR

RTS

CTS

DCD

RI

STATUS

VBAT_BB

VBAT_RF

GND

RESERVED

GND

ANT_MAIN

GND

ANT_GNSS

GND

ADC1

RESERVED

I2C_SDA

I2C_SCL

RESERVED

ADC0

GND

73

74

75

76

77

78

79

80

81

82

83

84

100

101

102

106

107

111

112

103

104

109

105

110

89

94

98

88

93

97

86

91

96

85

90

95

99

87

92

Power

USB

UART

USIM PCM

ANT

GND

RESERVED

OTHERS

108

1. Keep all reserved pins and unused pins unconnected.

2. GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84

should be unconnected.

NOTES

UC20 Hardware Design

3.2. Pin Assignment

The following figure shows the pin assignment of the UC20 module.

Figure 2: Pin Assignment (Top View)

UC20_Hardware_Design Confidential / Released 18 / 84

UMTS/HSPA Module Series

Type

Description

IO

Bidirectional input/output

DI

Digital input

DO

Digital output

PI

Power input

PO

Power output

AI

Analog input

AO

Analog output

OD

Open drain

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 able to

provide sufficient

current up to 0.8A.

VBAT_RF

57,58

PI

Power supply for

module RF part.

Vmax = 4.3V

Vmin = 3.4V

Vnorm = 3.8V

It must be able to

provide sufficient

current in a transmitting

burst which typically

rises to 2.0A.

VRTC

18

IO

Power supply for

internal RTC circuit.

VOmax = 3.25V

when VBAT ≥ 3.4V.

VI = 1.5V~3.25V at

IIN = 3uA when

VBAT is not applied.

UC20 Hardware Design

3.3. Pin Description

The following tables show the UC20’s pin definition.

Table 3: IO Parameters Definition

Table 4: Pin Description

UC20_Hardware_Design Confidential / Released 19 / 84

UMTS/HSPA Module Series

VDD_EXT

7

PO

Provide 1.8V for

external circuit.

Vnorm = 1.8V

IOmax = 20mA

Power supply for

external GPIO’s pull up

circuits.

VDD_2V85

34

PO

Provide 2.85V for

external circuit.

Vnorm = 2.85V

IOmax = 100mA

Power supply for

external GNSS LNA,

active antenna and

other circuits.

GND

8,9,19,36,

46,48,50~

54,56,72,

85~112

Ground.

Turn On/Off

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

PWRKEY

21

DI

Turn on/off the

module.

R

PU

≈ 200kΩ

VIHmax = 2.1V

VIHmin = 1.3V

VILmax = 500mV

Pull-up to 1.8V

internally.

RESET_N

20

DI

Reset the module.

RPU ≈ 200kΩ

VIHmax = 2.1V

VIHmin = 1.3V

VILmax = 500mV

Pull-up to 1.8V

internally.

Active low.

Status Indication

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

STATUS

61

OD

Indicate the module

operating status.

Require external

pull-up.

NET_MODE

5

DO

Indicate the module

network registration

mode.

VOHmin = 1.35V

VOLmax = 0.45V

1.8V power domain.

NET_

STATUS

6

DO

Indicate the module

network activity

status.

VOHmin = 1.35V

VOLmax = 0.45V

1.8V power domain. SLEEP_IND

3

DO

Indicate the sleep

status.

VOHmin = 1.35V

VOLmax = 0.45V

1.8V power domain.

USB Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 20 / 84

UMTS/HSPA Module Series

USB_VBUS

71

PI

USB detection.

Vmax = 5.25V

Vmin = 3.0V

Vnorm = 5.0V

USB_DP

69

IO

USB differential data

bus.

Compliant with USB

2.0 standard

specification.

Require differential

impedance of 90Ω.

USB_DM

70

IO

USB differential data

bus.

Compliant with USB

2.0 standard

specification.

Require differential

impedance of 90Ω.

USIM Interface

Pin Name

Pin No.

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

IOmax = 50mA

Either 1.8V or 3V is

supported by the

module automatically.

USIM_DATA

15

IO

Data signal of USIM

card.

For 1.8V USIM:

VILmax = 0.27V

VIHmin = 1.26V

VIHmax = 1.8V

VOLmax = 0.27V

VOHmin = 1.26V

For 3.0V USIM:

VILmax = 0.45V

VIHmin = 2.1V

VIHmax = 3.0V

VOLmax = 0.45V

VOHmin = 2.1V

Pull-up to USIM_VDD

with 15k resistor

internally.

USIM_CLK

16

DO

Clock signal of USIM

card.

For 1.8V USIM:

VOLmax = 0.36V

VOHmin = 1.26V

For 3.0V USIM:

VOLmax = 0.5V

VOHmin = 2.1V

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 21 / 84

UMTS/HSPA Module Series

USIM_RST

17

DO

Reset signal of

USIM card.

For 1.8V USIM:

VOLmax = 0.22V

VOHmin = 1.44V

For 3.0V USIM:

VOLmax = 0.36V

VOHmin = 2.4V

USIM_PRE

SENCE

13

DI

USIM card insertion

detection.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

ADC Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

ADC0

45

AI

General purpose

analog to digital

converter.

Voltage 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 indicator.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

DCD

63

DO

Data carrier

detection.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

CTS

64

DO

Clear to send.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

RTS

65

DI

Request to send.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

DTR

66

DI

Data terminal ready.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

Pull-up by default. TXD

67

DO

Transmit data.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 22 / 84

UMTS/HSPA Module Series

RXD

68

DI

Receive data.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

Debug UART Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

DBG_TXD

12

DO

Transmit data.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

DBG_RXD

11

DI

Receive data.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

RF Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

ANT_DIV

35

AI

Diversity antenna.

50Ω impedance

ANT_MAIN

49

IO

Main antenna.

50Ω impedance

ANT_GNSS

47

AI

GNNS antenna.

50Ω impedance

PCM Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

PCM_IN

24

DI

PCM data input.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

PCM_OUT

25

DO

PCM data output.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

PCM_SYNC

26

IO

PCM data frame sync signal.

VOLmax = 0.45V

VOHmin = 1.35V

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal.

PCM_CLK

27

IO

PCM data bit clock.

VOLmax = 0.45V

VOHmin = 1.35V

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain. In master mode, it’s an output signal. In slave mode, it is an input signal.

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 23 / 84

UMTS/HSPA Module Series

AGND

22

Reserved for analog

ground.

Ground.

If unused, connect

this pin to ground.

I2C Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

I2C_SCL

41

OD

I2C serial clock.

External pull-up

resistor is required.

1.8V only.

I2C_SDA

42

OD

I2C serial data.

External pull-up

resistor is required.

1.8V only.

Other Pins

Pin Name

Pin No.

I/O

Description

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

DI

Airplane mode

control.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

Pull-up by default.

In low level voltage,

module can enter into

airplane mode.

AP_READY

2

DI

Application

processor sleep

state detection.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

RESERVED Pins

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

RESERV

ED

23,28~33,3

7~40,43,55

,73~84

Reserved

Keep these pins

unconnected.

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 24 / 84

Quectel Wireless Solutions 201312UC20 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

About the Document

Contents

Table Index

Figure Index

1 Introduction

1.1. Safety Information

2 Product Concept

2.1. General Description

2.2. Directives and Standards

2.2.1. FCC Statement

2.2.2. FCC Radiation Exposure Statement

2.3. Key Features

2.4. Functional Diagram

2.5. Evaluation Board

3 Application Interface

3.1. General Description

3.2. Pin Assignment

3.3. Pin Description