YUGE CLM920 AC5 User manual

Product name
CLM920_AC5 Mini PCIE LTE Module
Hardware Manual
Number of pages
37
Version
V1.2
Date
2020/5/11
CLM920_AC5 Mini PCIE
LTE Module Hardware Manual
V1.2
Shanghai YUGE Information Technology Co., Ltd.

CLM920_AC5 Mini PCIE LTE Module Hardware Manual
Shanghai Yuge Information Technology co., LTD
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History record
Version
Date
Author
Description
V1.0
20190505
David
Initial
V1.1
20190704
David
Update current consumption
V1.2
20200511
David
Update the interface definition section

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Contents
Chapter 1. Introduction...........................................................................................................- 7 -
Chapter 2. Product Overview................................................................................................. - 9 -
2.1 Product introduction................................................................................................. - 9 -
2.2 Module characteristics..............................................................................................- 9 -
2.3 Module function..................................................................................................... - 11 -
Chapter 3. Interface Application Description.......................................................................- 13 -
3.1 Overview................................................................................................................ - 13 -
3.2 Module interface.....................................................................................................- 13 -
3.2.1 52-pin gold finger........................................................................................ - 13 -
3.2.2 Interface definition...................................................................................... - 14 -
3.3 Power interface.......................................................................................................- 17 -
3.4 Power on / off reset mode.......................................................................................- 19 -
3.4.1 Boot sequence..............................................................................................- 20 -
3.4.2 Power off..................................................................................................... - 20 -
3.4.3 Reset control................................................................................................- 20 -
3.5 USB interface......................................................................................................... - 21 -
3.6 UART interface...................................................................................................... - 23 -
3.7 USIM interface....................................................................................................... - 24 -
3.7.1 USIM card reference circuit........................................................................ - 24 -
3.7.2 USIM_DET Hot Swap Reference Design...................................................- 25 -
3.8 General GPIO interface.......................................................................................... - 26 -
3.9 Network indication interface.................................................................................. - 27 -
3.10 RF antenna interface.............................................................................................- 27 -
3.10.1 RF connector location................................................................................- 28 -
3.10.2 RF connector size...................................................................................... - 28 -
3.10.3 PCM digital voice interface.......................................................................- 30 -
Chapter 4. Overall technical indicators................................................................................ - 32 -
4.1 Overview of this chapter........................................................................................ - 32 -
4.2 working frequency..................................................................................................- 32 -
4.3 Conducted RF measurement...................................................................................- 32 -
4.3.1 Test environment......................................................................................... - 32 -
4.3.2 Standard test................................................................................................ - 33 -

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4.4 Conducted receive sensitivity and transmit power.................................................- 33 -
4.5 Antenna requirements.............................................................................................- 34 -
4.6 Power consumption characteristics........................................................................ - 34 -
Chapter 5. Interface electrical characteristics.......................................................................- 36 -
5.1 Working storage temperature..................................................................................- 36 -
5.2 Module IO level......................................................................................................- 36 -
5.3 Power supply.......................................................................................................... - 36 -
5.4 Static characteristics............................................................................................... - 37 -
Chapter 6. Structure and mechanical properties...................................................................- 38 -
6.1 Exterior................................................................................................................... - 38 -
6.2 Mini PCI Express connector...................................................................................- 38 -
6.3 Module fixing method............................................................................................ - 39 -
Picture index
Figure 2-1 Functional block diagram of the CLM920_AC5 Mini PCIE module................ - 12 -
Figure 3-1 Gold finger TOP surface and BOTTOM surface................................................- 13 -
Figure 3-2 Detail of the gold finger TOP and BOTTOM AB.............................................. - 14 -
Figure 3-3 LDO power reference circuit.............................................................................. - 18 -
Figure 3-4 DCDC power reference circuit........................................................................... - 18 -
Figure 3-5 MOS tube control power switch reference circuit..............................................- 18 -
Figure 3-6 GSM TDMA burst current supply voltage drop................................................. - 19 -
Figure 3-7 Power-on sequence diagram............................................................................... - 20 -
Figure 3-8 Reset reference circuit........................................................................................ - 21 -
Figure 3-9 Reset timing diagram..........................................................................................- 21 -
Figure 3-10 USB connection design circuit diagram........................................................... - 22 -
Figure 3-11 UART serial port design................................................................................... - 23 -
Figure 3-12 Level conversion circuit................................................................................... - 24 -
Figure 3-13 USIM design circuit diagram............................................................................- 25 -
Figure 3-14 SIM card hot swap detection............................................................................ - 26 -
Figure 3-15 Network indicator circuit diagram....................................................................- 27 -
Figure 3-16 Location map of RF connectors........................................................................- 28 -
Figure 3-17 Dimensional drawing of the RF connector.......................................................- 28 -
Figure 3-18 Dimensional drawing of matched coaxial RF cables....................................... - 29 -
Figure 3-19 Main and diversity antenna matching circuits.................................................. - 29 -

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Figure 3-20 Comparison of received signal strength of antennas with and without diversity- 30 -
Figure 6-1 CLM920_AC5 Appearance................................................................................ - 38 -
Figure 6-2 Connector dimensions........................................................................................ - 38 -
Table index
Table 2-1 Module specifications............................................................................................ - 9 -
Table 2-2 Module frequency band list....................................................................................- 9 -
Table 2-3 Key features..........................................................................................................- 10 -
Table 3-1 IO parameter definition........................................................................................ - 14 -
Table 3-2 Interface definition............................................................................................... - 14 -
Table 3-3 Definition of power pins...................................................................................... - 17 -
Table 3-4 Pin Definition of Switch Reset.............................................................................- 19 -
Table 3-5 Power-on sequence parameters............................................................................ - 20 -
Table 3-6 RESET pin parameters......................................................................................... - 21 -
Table 3-7 USB interface pin definition................................................................................ - 22 -
Table 3-8 UART serial signal definition...............................................................................- 23 -
Table 3-9 SIM card signal definition....................................................................................- 24 -
Table 3-10 Definition of SIM card hot swap detection pins................................................ - 25 -
Table 3-11 General GPIO pin definition.............................................................................. - 26 -
Table 3-12 Network indicator pin definition........................................................................ - 27 -
Table 3-13 Network indication status...................................................................................- 27 -
Table 3-14 RF connector main parameters...........................................................................- 28 -
Table 3-15 PCM pin definition.............................................................................................- 30 -
Table 3-16 PCM specific parameters................................................................................... - 30 -
Table 4-1 RF frequency table............................................................................................... - 32 -
Table 4-2 Test instruments....................................................................................................- 32 -
Table 4-3 3G RF indicators.................................................................................................. - 33 -
Table 4-4 4G RF sensitivity index........................................................................................- 33 -
Table 4-5 4G RF transmit power index................................................................................ - 34 -
Table 4-6 Main antenna specifications................................................................................. - 34 -
Table 4-7 WCDMA power consumption..............................................................................- 34 -
Table 4-8 LTE power consumption...................................................................................... - 35 -
Table 5-1 CLM920_AC5 Mini PCIE 4G module operating temperature............................ - 36 -
Table 5-2 Electrical characteristics of CLM920_AC5 Mini PCIE module..........................- 36 -

CLM920_AC5 Mini PCIE LTE Module Hardware Manual
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Table 5-3 Working voltage of CLM920_AC5 Mini PCIE module...................................... - 36 -
Table 5-4 CLM920_AC5 Mini PCIE ESD features............................................................. - 37 -

CLM920_AC5 Mini PCIE LTE Module Hardware Manual
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Chapter 1. Introduction
This document is a wireless solution product CLM920_AC5 Mini PCIE module hardware
interface manual, which is designed to describe the hardware composition and functional
characteristics of the module solution product, application interface definition and instructions,
electrical and mechanical characteristics, etc., for users to develop based on the product
application Provide hardware description.
Abbreviation：
ADC
Analog-Digital Converter
AFC
Automatic Frequency Control
AGC
Automatic Gain Control
ARFCN
Absolute Radio Frequency Channel Number
B2B
Board to Board Connector
BER
Bit Error Rate
CDMA
Code Division Multiple Access
DAI
Digital Audio interface
DAC
Digital-to-Analog Converter
DSP
Digital Signal Processor
DTR
Data Terminal Ready
EFR
Enhanced Full Rate
EMC
Electromagnetic Compatibility
EMI
Electro Magnetic Interference
ESD
Electronic Static Discharge
EVDO
Evolution Data Only
FR
Full Rate
GPRS
General Packet Radio Service
HR
Half Rate
IMEI
International Mobile Equipment Identity
ISO
International Standards Organization
PLL
Phase Locked Loop

CLM920_AC5 Mini PCIE LTE Module Hardware Manual
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PPP
Point-to-point protocol
RAM
Random Access Memory
ROM
Read-only Memory
RTC
Real Time Clock
SMS
Short Message Service
UART
Universal asynchronous receiver-transmitter
UIM
User Identifier Management
USB
Universal Serial Bus
VSWR
Voltage Standing Wave Ratio

CLM920_AC5 Mini PCIE LTE Module Hardware Manual
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Chapter 2. Product Overview
2.1 Product introduction
CLM920_AC5 Mini PCIE module is a PCI Express Mini Card 1.2 standard module, is a
wireless terminal product integrating FDD-LTE / TDD-LTE / WCDMA / and other network
standards. It supports the three major network formats of China Mobile Unicom Telecom and
supports embedded operating systems such as OS: Windows series / Linux / Android.
CLM920_AC5 module can be used in the following occasions：
Car Equipment
Wireless POS machine
Wireless advertising, media
Remote monitoring
Smart meter reading
Mobile broadband
automated industry
Other wireless terminals, etc.
2.2 Module characteristics
Table 2-1 Module specifications
Product name
Description
CLM920_AC5 Mini PCIE
LTE for CMCC,CUCC and CTCC
Table 2-2 Module frequency band list
Network Type
Frequency band
Model：CLM920 AC5 Mini PCIE
LTE(FDD)
LTE FDD B1
√
LTE FDD B3
√
LTE FDD B5
√
LTE FDD B8
√
LTE(TDD)
LTE TDD B38
√
LTE TDD B39
√
LTE TDD B40
√

CLM920_AC5 Mini PCIE LTE Module Hardware Manual
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LTE TDD B41
√
WCDMA
BAND 1
√
BAND 5
√
BAND 8
√
The module chip supports Category 4 by default.
Diversity function is optional.
Optional frequency band.
Table 2-3 Key features
Characteristic
Description
Physical characteristics
51mmx30mmx3.6mm
Fixed way
Ground screw hole (2)
Application processor
Single-core ARM Cortex-A7 processor, clocked at 1.2GHZ,
256kB level 2 cache
Operating Voltage
3.3V-4.2V Typical voltage 3.7V
Energy saving current
Standby current < 5mA
Application interface
Standard SIM interface, support 3.0V/1.8V, support hot swap
function
USB2.0 (High-Speed)
Hardware reset interface
UART serial interface
PCM voice interface
Power interface
Network status indication interface
Antenna connector
Main set antenna connector (MM4829-2702RA4)
Diversity Antenna Connector (MM4829-2702RA4)
Transmit power
LTE:
Class 3 (23dBm±2dB)
UMTS:
Class 3 (24dBm+1/-3dB)
Data service
WCDMA:

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UMTS R99：DL 384 kbps/UL 384 kbps
DC-HSPA+: DL 42 Mbps/UL 5.76 Mbps
LTE:
LTE FDD:DL 150Mbps/UL 50Mbps@20M BW cat4
LTE TDD:DL 130Mbps/UL 35Mbps@20M BW cat4
LTE FDD:DL 10Mbps/UL 5Mbps@20M BW cat1
LTE TDD:DL 10Mbps/UL 5Mbps@20M BW cat1
Diversity antenna
Support LTE diversity antenna
AT command
Support for standard AT instruction sets (Hayes 3GPP TS 27.007
and 27.005)
SMS business
Support Text and PDU mode
Support point-to-point MO and MT
SMS storage: USIM card / ME (default)
Virtual network card
Support USB virtual network card
Temperature range
Normal operating temperature –35°C to +75°C
Extreme operating temperature –40°C to +85°C
Storage temperature -40°C to +85°C
Module function
distinction
Above the label, M stands for the main set, D with the table
diversity, F for the FDD band, and T for the TDD band.
2.3 Module function
The CLM920_AC5 Mini PCIE module mainly includes the following circuit units.：
Baseband processing unit
Power management unit
Memory unit
RF transceiver unit
RF front end unit.

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The functional block diagram of the CLM920_AC5 Mini PCIE module is shown below：
Figure 2-1 Functional block diagram of the CLM920_AC5 Mini PCIE module

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Chapter 3. Interface Application Description
3.1 Overview
This chapter mainly describes the interface definition and application of this module. Contains
the following sections:
52-pin gold finger
Interface definition
Power interface
USB interface
USIM interface
UART interface
WWAN control interface
PCM voice interface
RF antenna interface.
3.2 Module interface
3.2.1 52-pin gold finger
CLM920_AC5 Mini PCIE module uses 52-pin Mini PCIE gold finger as external interactive
interface.
Figure 3-1 Gold finger TOP surface and BOTTOM surface

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Figure 3-2 Detail of the gold finger TOP and BOTTOM AB
3.2.2 Interface definition
The CLM920_AC5 Mini PCIE module interface is a standard Mini PCI Express interface.
The module interface is defined as shown in the following table：
Table 3-1 IO parameter definition
Symbol sign
Description
IO
Two-way input and output
PI
Power input
PO
Power Output
AI
Analog input
AO
Analog output
DI
Digital input
DO
Digital output
Table 3-2 Interface definition
Pin
Standard
definition
Module
definition
IO
Functional description
Remarks

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1
WAKE#
NC
2
3.3Vaux
VBAT
PI
power input
3
COEX1
NC
4
GND
GND
Ground
5
COEX2
NC
6
1.5V
UIM_DET
DI
SIM card hot swap
detection
7
CLKREQ#
NC
8
UIM_PWR
UIM_PWR
PO
SIM power output
9
GND
GND
Ground
10
UIM_DATA
UIM_DATA
IO
SIM data signal
11
REFCLK-
UART_RX
DI
Serial port receiving
signal
12
UIM_CLK
UIM_CLK
DO
SIM clock signal
13
REFCLK+
UART_TX
DO
Serial port sending signal
14
UIM_RESET
UIM_RESET
DO
SIM reset signal
15
GND
GND
Ground
16
UIM_VPP
NC
17
RESERVED
VDD_EXT
PO
1.8V output power
18
GND
GND
Ground
19
RESERVED
AP_READY
*
* Reserved
* Reserved
20
W_DISABLE#
W_DISABLE#
DI
Turn off RF
communication
Active low
21
GND
GND
Ground
22
PERST#
RESET
DI
Reset control
Active low
23
PERn0
NC
24
3.3Vaux
VBAT
PI
power input
25
PERp0
UART_RTS
DO
* Serial request sending
26
GND
GND
Ground
27
GND
GND
Ground
28
1.5V
UART_CTS
DI
* Serial port clear
29
GND
GND
Ground

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30
SMB_CLK
NC
31
PETn0
NC
32
SMB_DATA
WAKEUP_IN
DI
Module sleep control
1.8V, active
low
33
PETp0
NC
34
GND
GND
Ground
35
GND
GND
Ground
36
USB_D-
USB_DM
IO
USB differential signal-
37
GND
GND
Ground
38
USB_D+
USB_DP
IO
USB differential signal +
39
3.3Vaux
VBAT
PI
power input
40
GND
GND
Ground
41
3.3Vaux
VBAT
PI
power input
42
LED_WWAN#
LED_WWAN#
OC
Status indicator
43
GND
GND
Ground
44
LED_WLAN#
NC
45
RESERVED
PCM_CLK
DO
PCM clock pulse
46
LED_WPAN#
NC
Reserved
status
indicator
47
RESERVED
PCM_DOUT
DO
PCM send data
48
1.5V
NC
49
RESERVED
PCM_DIN
DI
PCM receive data
50
GND
GND
Ground
51
RESERVED
PCM_SYNC
DO
Frame sync signal
52
3.3Vaux
VBAT
PI
power input
The module's general IO port level is 1.8V (except SIM, the SIM card port level supports
1.8V and 3.0V).
This module defines that the pins of RESERVED and NC are left floating and must not
be used.

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3.3 Power interface
CLM920_AC5 Mini PCIE module power interface contains two parts：
VBAT is the working power of the module;
UIM_PWR is the power supply for SIM card work；
CLM920_AC5 Mini PCIE module power interface is as follows：
Table 3-3 Definition of power pins
Pin
Name
I/O
Description
Min
Typical
Max
2,24,39,41,52
VBAT
PI
Module power
supply
3.3V
3.7V
4.2V
8
UIM_PWR
PO
SIM power
supply
0
1.8V/2.85V
1.9/2.95V
17
VDD_EXT
PO
Output power
1.8V
4,9,15,18,21,26,
27,29,34,35,37,
40,43,50
GND
Ground
-
0
-
CLM920_AC5 Mini PCIE module adopts single power supply mode, the module provides 5
power supply pins and 14 ground pins. In order to ensure the normal operation of the module,
all power and ground pins must be connected and used. The power supply range of the
module is 3.3-4.2V, it is recommended to use 3.7V / 2A power supply. The module will
generate a current of more than 2A peak at the moment of data transmission or conversation,
resulting in a relatively large ripple on the power supply. Therefore, when the customer
designs the circuit, the power supply trace should be kept as short and wide as possible. It is
recommended to reserve a 220uF capacitor near the power input. It is recommended that
customers can use DCDC or LDO to provide sufficient current. Then control the VBAT power
supply through the MOS tube, so that the module can be completely powered off. The actual
use can refer to the following circuit design：

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Figure 3-3 LDO power reference circuit
Figure 3-4 DCDC power reference circuit
Figure 3-5 MOS tube control power switch reference circuit
1. In order to prevent damage to the module caused by surge and overvoltage, it is
recommended to connect a 5.1V / 500mW Zener diode in parallel to the VBAT pin of the
module.

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2. It is recommended to add a filter capacitor (10pF, 33pF, 100nF, 10uF, 220uF, etc.) at the
VBAT pin to reduce voltage drop and reduce power supply ripple and place it close to the
VBAT pin.
3. The minimum working voltage of the module is 3.3V. Due to the transmission of data or
GSM calls, a current of more than 2A will be generated, resulting in a ripple voltage drop on
the power supply voltage, so the power supply voltage must not be lower than 3.3V.
Figure 3-6 GSM TDMA burst current supply voltage drop
3.4 Power on / off reset mode
The CLM920_AC5 Mini PCIE module only supports one power-on boot method. Users can
determine whether the module is powered on by querying the high and low levels of the
VDD_EXT pin.
Table 3-4 Pin Definition of Switch Reset
Pin
Signal name
I/O
High value
Description
22
RESET
DI
1.8V
Module reset control pin, active low

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3.4.1 Boot sequence
Figure 3-7 Power-on sequence diagram
Table 3-5 Power-on sequence parameters
Symbol
Description
Min
Typical
Max
Unit
Ton
Start-up low-level width
100
500
-
mS
Ton(status)
Boot time (judging by status)
22
-
-
S
Ton(usb)
Boot time (judgment based on usb status)
-
20
-
S
Ton(uart)
Boot time (judgment based on uart status)
-
20
-
S
VIH
PWRKEY input high level
0.6
0.8
1.8
V
VIL
PWRKEY input low
-0.3
0
0.5
V
3.4.2 Power off
If you want to shut down the CLM920_AC5 Mini PCIE module, you can cut off the VBAT
power supply. At this time, the module does not perform the normal shutdown process. Only
when the module works abnormally and cannot be restarted, it is recommended to restart the
module after power off.It is recommended that the interval between two restarts be greater
than 30s.
3.4.3 Reset control
The CLM920_AC5 Mini PCIE module PIN22 signal is the RESET reset pin. When the
application needs to reset the module, it can be reset by pulling this pin low for 150-450ms.
The RESET pin is sensitive to interference, keep away from radio frequency interference
signals when routing.