Fibocom FM350-GL Installation instructions

FM350-GL Hardware Guide _General
Version: V1.0.6
Date: 2020-04-25

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FM350-GL Hardware Guide Page 2 of 67
Applicability Type
No.
Product model
Description
1
FM350-GL-00
NA

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Copyright
Copyright © 2021 Fibocom Wireless Inc. All rights reserved.
Without the prior written permission of the copyright holder, any company or individual is prohibited to
excerpt, copy any part of or the entire document, or distribute the document in any form.
Notice
The document is subject to update from time to time owing to the product version upgrade or other reasons.
Unless otherwise specified, the document only serves as the user guide. All the statements, information
and suggestions contained in the document do not constitute any explicit or implicit guarantee.
Trademark
The trademark is registered and owned by Fibocom Wireless Inc.

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FM350-GL Hardware Guide Page 4 of 67
Change History
Version
Author
Date
Remark
V1.0.6
Lei Daijun
2021-4-25
Section 2.2, split specification into two parts:
2.2.1 RF Characteristic(add modulation description)
2.2.2 Key Features
V1.0.5
Ou Peng
2021-03-15
● Section 3.5.4, modify USIM design requirement
● Add Section 6.5, M.2 Card Assembly
● Update NSA and LTE UL rate
● Update partial band 3GPP requirement and condition
V1.0.4
Xiao Dequan
2021-02-06
● Update Phase2 feature
V1.0.3
Lei Daijun
2020-11-11
● Update Power Sequence
V1.0.2
Xiao Dequan
2020-09-15
● Update n25, n30
● Update PCIe impedance requirement
V1.0.1
Lei Daijun
2020-6-30
● Update pin definition
● Update FCPO# and RESET# recommended design
● Update WWAN M.2 module type configuration
V1.0.0
Lei Daijun
2020-4-30
Draft version

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FM350-GL Hardware Guide Page 5 of 67
Contents
1Foreword....................................................................................................................... 8
1.1 Introduction .................................................................................................................... 8
1.2 Reference Standard ....................................................................................................... 8
1.3 Related Document ......................................................................................................... 9
2Overview ......................................................................................................................10
2.1 Introduction .................................................................................................................. 10
2.2 Specification.................................................................................................................10
RF Characteristic ........................................................................................................ 10
Key Features ...............................................................................................................11
2.3 CA Combinations.......................................................................................................... 12
2.4 Application Block ..........................................................................................................14
2.5 Hardware Block Diagram ............................................................................................. 14
2.6 Antenna Configuration.................................................................................................. 15
3Application Interface...................................................................................................16
3.1 M.2 Interface ................................................................................................................16
Pin Map ...................................................................................................................... 16
Pin Definition............................................................................................................... 17
3.2 Power Supply ............................................................................................................... 21
Power Supply.............................................................................................................. 22
Logic Level.................................................................................................................. 23
Power Consumption ................................................................................................... 23
3.3 Control Signal............................................................................................................... 26
Module Start-Up.......................................................................................................... 27
3.3.1.1 Start-up Circuit...........................................................................................................................27
3.3.1.2 Start-up Timing Sequence .........................................................................................................27
Module Shutdown ....................................................................................................... 28
Module Reset.............................................................................................................. 29
PCIe Link State........................................................................................................... 31
3.3.4.1 D0 L1.2......................................................................................................................................31
3.3.4.2 D3cold L2.....................................................................................................................................32
Timing Application....................................................................................................... 33
3.4 PCIe Interface .............................................................................................................. 33
PCIe Interface Definition............................................................................................. 33

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PCIe Interface Application .......................................................................................... 34
3.5 USIM Interface ............................................................................................................. 36
USIM Pins................................................................................................................... 36
USIM Interface Circuit................................................................................................. 36
3.5.2.1 N.C. SIM Card Slot ....................................................................................................................36
3.5.2.2 N.O. SIM Card Slot....................................................................................................................37
USIM Hot-plug ............................................................................................................ 38
USIM Design............................................................................................................... 38
3.6 Status Indicator ............................................................................................................ 39
LED#1 Signal.............................................................................................................. 39
WOWWAN#................................................................................................................ 40
3.7 Interrupt Control ...........................................................................................................40
W_DISABLE1# ........................................................................................................... 41
BODYSAR .................................................................................................................. 41
3.8 ANT Tunable Interface ................................................................................................. 41
3.9 Configuration Interface ................................................................................................. 42
4Radio Frequency .........................................................................................................43
4.1 RF Interface ................................................................................................................. 43
RF Interface Functionality........................................................................................... 43
RF Connector Characteristic....................................................................................... 43
RF Connector Dimension............................................................................................ 44
RF Connector Assembly ............................................................................................. 45
4.2 Operating Band ............................................................................................................ 47
4.3 Transmitting Power ......................................................................................................49
4.4 Receiver Sensitivity ......................................................................................................51
Dual Antenna Receiver Sensitivity.............................................................................. 51
Four Antenna Receiver Sensitivity.............................................................................. 53
4.5 GNSS ...........................................................................................................................55
4.6 Antenna Design............................................................................................................ 56
5ESD Characteristics ....................................................................................................58
6Structure Specification ...............................................................................................59
6.1 Product Appearance..................................................................................................... 59
6.2 Dimension of Structure................................................................................................. 59
6.3 M.2 Interface Model...................................................................................................... 60

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6.4 M.2 Connector.............................................................................................................. 61
6.5 M.2 Card Assembly ......................................................................................................63
Card Insertion ............................................................................................................. 63
Mid-mount Connection with Single-Sided Module ...................................................... 64
Top-mount Connection with Single-Sided Module ...................................................... 64
6.6 Storage......................................................................................................................... 65
Storage Life ................................................................................................................ 65
6.7 Packing ........................................................................................................................ 65
Tray Package.............................................................................................................. 65
Tray Size..................................................................................................................... 67

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FM350-GL Hardware Guide Page 8 of 67
1 Foreword
1.1 Introduction
The document describes the electrical characteristics, RF performance, dimensions and application
environment, etc. of FM350-GL (hereinafter referred to as FM350). With the assistance of the document
and other instructions, the developers can quickly understand the hardware functions of FM350 modules
and develop products.
1.2 Reference Standard
The design of the product complies with the following standards:
3GPP TS 38.300 V15.5.0: 3rd Generation Partnership Project; Technical Specification Group Radio
Access Network; NR; NR and NG-RAN Overall Description; Stage 2
3GPP TS 38.521-1 V15.2.0: User Equipment (UE) conformance specification; Radio transmission
and reception; Part 1: Range 1 Standalone
3GPP TS 38.521-3 V15.2.0: User Equipment (UE) conformance specification; Radio transmission
and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios
3GPP TS 34.121-1 V8.11.0: User Equipment (UE) conformance specification; Radio transmission
and reception (FDD); Part 1: Conformance specification
3GPP TS 34.122 V11.13.0: Technical Specification Group Radio Access Network; Radio
transmission and reception (TDD)
3GPP TS 36.521-1 V14.0.0: User Equipment (UE) conformance specification; Radio transmission
and reception; Part 1: Conformance testing
3GPP TS 21.111 V10.0.0: USIM and IC card requirements
3GPP TS 51.011 V4.15.0: Specification of the Subscriber Identity Module -Mobile Equipment (SIM-
ME) interface
3GPP TS 31.102 V10.11.0: Characteristics of the Universal Subscriber Identity Module (USIM)
application
3GPP TS 31.11 V10.16.0: Universal Subscriber Identity Module (USIM) Application Toolkit(USAT)
3GPP TS 36.124 V10.3.0: Electro Magnetic Compatibility (EMC) requirements for mobile terminals
and ancillary equipment
3GPP TS 27.007 V10.0.8: AT command set for User Equipment (UE)
3GPP TS 27.005 V10.0.1: Use of Data Terminal Equipment - Data Circuit terminating Equipment
(DTE - DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)
PCI Express M.2 Specification Rev1.2

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1.3 Related Document
FIBOCOM Design Guide_RF Antenna

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2 Overview
2.1 Introduction
FM350 is a highly integrated 5G Sub-6 WWAN module which uses M.2 form factor interface. It supports
NR/LTE /WCDMA systems and can be applied to most cellular networks of mobile carrier in the world.
2.2 Specification
RF Characteristic
FM350 RF characteristic is shown in Table 2-1:
Table 2-1 RF characteristic
Operating Band
NR Sub-6
n1/2/3/5/7/8/20/25/28/30/38/40/41/481)/66/71/77/78/79
FDD-LTE
B1/2/3/4/5/7/8/12/13/14/17/18/19/20/25/26/28/29/30/32/66/71
TDD-LTE
B34/38/39/40/41/42/43/46/48
UMTS/HSPA+
B1/2/4/5/8
GNSS
GPS/GLONASS/Galileo/BDS/QZSS
Data Throughput
Sub-6 SA
DL 4.67Gbps/UL 1.25Gbps
Sub-6 NSA
DL 3.74Gbps/UL 835Mbps
LTE
DL 1.6Gbps (CAT19)/UL 211Mbps(CAT18)
UMTS/HSPA+
DL UMTS: 384 kbps/UL 384 kbps
DL DC-HSPA+: 42 Mbps (CAT24)/UL 11.5 Mbps (CAT7)
Modulation Characteristic
NR Sub6
Modulation
3GPP Release 15
200MHz 2 DLCA, 256 QAM
200MHz 2 ULCA, 256 QAM
15KHz/30KHz SCS for FDD/TDD
LTE Modulation
3GPP Release 15
100MHz 5 DLCA, 256 QAM
40MHz 2 ULCA, 256 QAM
UMTS Modulation
3GPP Release 8
RF Characteristic

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HPUE
B41, n41/772)/78/79
MIMO
NR DL 4x4 MIMO: n1/2/3/7/25/30/38/40/41/48/66/77/78/79
NR UL 2x2 MIMO: n41/77/78/79
LTE DL 4x4 MIMO: B1/2/3/4/7/25/30/34/38/39/40/41/42/43/48/66
SRS
n41/77/78/79
1T2R/1T4R/2T4R
TX Switching
NR: n1/2/3/7/25/30/38/40/41/48/66/77/78/79
LTE: B1/2/3/4/7/25/30/34/38/39/40/41/42/43/48/66
UMTS/HSPA+: B1/2/4
Carrier Aggregation
Sub-6 SA
DL 2CA, UL 2CA
Sub-6 NSA
DL LTE 5CA+ NR 1CA, LTE 3CA+ NR 2CA , UL LTE 2CA+ NR 1CA
LTE
DL 5CA, UL 2CA
Key Features
Table 2-2 Key features
Specification
CPU
MTK T700, 7nm process, ARM Cortex-A55, up to 1.5 GHz
Memory
4Gb LPDDRX4+4Gb NAND Flash
Supported OS
Windows 10/Chrome (Linux/Android)
Power Supply
DC 3.135V to 4.4V, typical 3.3V
Temperature
Normal operating temperature: –10°C to +55°C
Extended operating temperature: –30°C to +75°C3)
Storage temperature: –40°C to +85°C
Physical
Characteristics
Interface: M.2 Key-B
Dimension: 30 x 52 x 2.3mm
Weight: 8g
Interface
Antenna Connector
WWAN Antenna x 4
Support 4x4 MIMO
Function Interface
Dual SIM (one built-in eSIM), 1.8V/3V

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FM350-GL Hardware Guide Page 12 of 67
PCIe Gen3 x1
USB 2.0 (For debug)
USB 3.1 Gen1 (Reserved)
W_Disable#
BodySAR
LED
Tunable antenna
I2C (Reserved)
UART (Reserved)
Software
Protocol Stack
IPV4/IPV6
AT Commands
3GPP TS 27.007 and 27.005
Firmware Update
PCIe
Other Feature
Multiple carrier
Windows update
Note:
1) Disabled for FCC cannot certify currently, will enable in future after FCC can certify
2) n77 support HPUE only for FCC region application (cover 3.3–3.98GHz)
3) When temperature goes beyond normal operating temperature range of -10°C to +55°C, RF
performance of module may be slightly off 3GPP specifications.
2.3 CA Combinations
DL CA Combinations
2CA
Inter-band
Intra-band
TBD

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FM350-GL Hardware Guide Page 13 of 67
DL CA Combinations
3CA
Inter-band
Intra-band
TBD
4CA
Inter-band
Intra-band
TBD
5CA
Inter-band
Intra-band
TBD
NSA
TBD
TBD

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FM350-GL Hardware Guide Page 14 of 67
2.4 Application Block
The peripheral applications for FM350 module are shown in Figure 2-1:
Module
SIM1 USB2.0/
USB3.0
Power
Supply ON/OFF# RESET#
Control
EINT Indicator
Host application
ANT3(D/G) ANT0(M)
SIM
Card
PCIe
ANT2(M2) ANT1(M1)
eSIM
Figure 2-1 Application block
2.5 Hardware Block Diagram
The hardware block diagram in Figure 2-2 shows the main hardware functions of FM350 module, including
base band and RF functions.
Baseband contains the followings: RF contains the followings:
● 5G NR/LTE/UMTS controller ● RF Transceiver
● PMU ● RF ET Power/PA
● MCP (NAND+LPDDR4 RAM) ● RF PAMid/Front end
● Application interface ● RF SW
● RF Multi-plexer/Filter

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FM350-GL Hardware Guide Page 15 of 67
+3.3V
FUL_CARD_POWER_OFF#
RESET#
PCIe
USB2.0
USB 3.0
USIM1
EINT
WOWWAN#
LED
I2C
UART
ANT_TUNER_1V8
MIPI_RFFE
Tunable ANT
Baseband
(NR/LTE FDD/LTE TDD/UMTS
controller)
PMU
PA ET0
DCDC
DRX
RF Part
M.2 Key-B 75pin interface
ANT3
(D/G)
ANT0
(M)
GNSS LNA
RF
Transceiver
TCXO
Triplexer Triplexer
MB/HB
PAMiD
TXA0
PRX
DPDT
LB
PAMiD
ANT2
(M2)
ANT1
(M1)
DRX2
PRX2
GNSS
SAW
GNSS
Receiver
DRF
MCP
(NAND+LPDDR4)
MIPI RFFE
IQ
eSIM
Diplexer
Diplexer
UHB Main
PAMid
UHB Comp
PAMid
UHB/XB DRX
(4x4 MIMO)
SAW/
LNA
UHB/XB DRX
(4x4 MIMO)
SAW/
LNA
PA ET1
DCDC
TXA1
Multi-
plexer
SPDT
N41 PA
DPDT
DPDT
SP3T
SPDT
M/HB FEM
(4x4 MIMO)
GNSS
Extractor
SPDT
Figure 2-2 Hardware block diagram
2.6 Antenna Configuration
FM350 module supports four antennas and the configuration is as below table:
Antenna Connector
Function Description
Band Configuration
Frequency Range
(MHz)
ANT0(M)
Main antenna port for
TRX and SRS
All supported bands transmit
& receive and SRS
617~5925
ANT1(M1)
Antenna port for RX and
SRS
4x4MIMO supported bands
receive and SRS
1805~5000
ANT2(M2)
Antenna port for TRX and
SRS
Transmit, 4x4 MIMO receive
and SRS
1452~5000
ANT3(D/G)
Diversity & GNSS ANT
and SRS
All supported bands and
GNSS receive, SRS
617~5925

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FM350-GL Hardware Guide Page 16 of 67
3 Application Interface
3.1 M.2 Interface
The FM350 module applies standard M.2 Key-B interface, with a total of 75 pins.
Pin Map
Figure 3-1 Pin Map
Note:
Pin “Notch” represents the gap of the gold fingers.

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FM350-GL Hardware Guide Page 17 of 67
Pin Definition
The pin definition is as below table:
Pin
Pin Name
I/O
Reset Value
Pin Description
Level
1
CONFIG_3
O
NC
NC, FM350 M.2 module is configured as
the WWAN –PCIe Gen3, USB3.1 Gen1
interface type
-
2
+3.3V
PI
-
Power input
Power Supply
3
GND
-
-
GND
Power Supply
4
+3.3V
PI
-
Power input
Power Supply
5
GND
-
-
GND
Power Supply
6
FULL_CARD_
POWER_OFF#
I
PU
Power enable, module power on input,
internal pull up(350KΩ)
3.3/1.8V
7
USB D+
I/O
-
USB data plus
0.3---3V
8
W_DISABLE1#
I
PD
WWAN disable, active low
3.3/1.8V
9
USB D-
I/O
-
USB data minus
0.3---3V
10
LED1#
OD
T
System status LED, output open drain,
3.3V
3.3V
11
GND
-
-
GND
Power Supply
12
Notch
Notch
13
Notch
Notch
14
Notch
Notch
15
Notch
Notch
16
Notch
Notch
17
Notch
Notch
18
Notch
Notch
19
Notch
Notch
20
GPIO
I/O
PD
GPIO.
Reserved
1.8V
21
CONFIG_0
O
NC
GND, FM350 M.2 module is configured
as the WWAN –PCIe Gen3, USB3.1
Gen1 interface type
-
22
UART_TX
O
PD
UART TXD output, can mux as
ANT_TUNER_CFG or GPIO.
Reserved
1.8V

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FM350-GL Hardware Guide Page 18 of 67
Pin
Pin Name
I/O
Reset Value
Pin Description
Level
23
WOWWAN#
O
PD
Wake up host, Reserved
1.8V
24
ANT_TUNER_1V8
O
PD
1.8V power output for antenna tuner, can
mux as GPIO.
Reserved
1.8V
25
DPR
I
PD
Dynamic power reduction - Body SAR
control signal (SAR_BACK_OFF)
3.3/1.8V
26
W_DISABLE2#
I
PD
GNSS disable, active low, Reserved
3.3/1.8V
27
GND
-
-
GND
Power Supply
28
UART_RX
I
PD
UART RXD input, can mux as DPR2 or
GPIO.
Reserved
1.8V
29
USB3.0_TX-
O
-
USB3.0 transmit data minus, reserved
-
30
UIM_RESET
O
PD
SIM reset signal
1.8V/3V
31
USB3.0_TX+
O
-
USB3.0 transmit data plus, reserved
-
32
UIM_CLK
O
PD
SIM clock Signal
1.8V/3V
33
GND
-
-
GND
Power Supply
34
UIM_DATA
I/O
PD
SIM data input/output
1.8V/3V
35
USB3.0_RX-
I
-
USB3.0 receive data minus, reserved
-
36
UIM_PWR
O
-
SIM power supply, 1.8V/3V
1.8V/3V
37
USB3.0_RX+
I
-
USB3.0 receive data plus, reserved
-
38
NC
-
NC
-
39
GND
-
-
GND
Power Supply
40
I2C_SCL
O
PU
I2C master clock
1.8V
41
PETn0
O
-
PCIe TX differential signals
negative
-
42
I2C_SDA
I/O
PU
I2C master data
1.8V
43
PETp0
O
-
PCIe TX differential signals positive
-
44
I2C_IRQ#
I
PU
I2C interrupt request
1.8V
45
GND
-
-
GND
Power Supply
46
NC
-
-
-
-
47
PERn0
I
-
PCIe RX differential signals
negative
-

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FM350-GL Hardware Guide Page 19 of 67
Pin
Pin Name
I/O
Reset Value
Pin Description
Level
48
NC
-
-
-
-
49
PERp0
I
-
PCIe RX differential signals positive
-
50
PERST#
I
PU
Asserted to reset module PCIe interface
default. If module went into core dump, it
will reset whole module, not only PCIe
interface.
Active low, internal pull up(10KΩ)
3.3/1.8V
51
GND
-
-
GND
Power Supply
52
CLKREQ#
I/O
PD
Asserted by device to request a PCIe
reference clock be available (active clock
state) in order to transmit data. It also
used by L1 PM Sub states mechanism,
asserted by either host or device to
initiate an L1 exit.
Active low, open drain output and should
add external pull up on platform
3.3/1.8V
53
REFCLKN
I
-
PCIe reference clock signal
Negative
-
54
PEWAKE#
O
T
Asserted to wake up system and
reactivate PCIe link from L2 to L0, it
depends on system
whether supports wake up functionality.
Active low, open drain output and should
add external pull up on platform
3.3/1.8V
55
REFCLKP
I
-
PCIe reference clock signal
Positive
-
56
RFFE_SCLK
O
PD
MIPI interface tunable ANT,
RFFE clock
1.8V
57
GND
GND
Power Supply
58
RFFE_SDATA
I/O
PD
MIPI interface tunable ANT,
RFFE data
1.8V
59
ANTCTL0
O
PD
Tunable ANT CTRL0
1.8V
60
COEX3
I/O
PD
Wireless coexistence between WWAN
and WiFi/BT modules, based on BT-SIG
coexistence protocol. COEX_EXT_FTA,
Reserved
1.8V

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FM350-GL Hardware Guide Page 20 of 67
Pin
Pin Name
I/O
Reset Value
Pin Description
Level
61
ANTCTL1
O
PD
Tunable ANT CTRL1
1.8V
62
COEX_RXD
I
PD
Wireless coexistence between WWAN
and WiFi/BT modules, based on BT-SIG
coexistence protocol. UART receive
signal(WWAN module side), Reserved
1.8V
63
ANTCTL2
O
PD
Tunable ANT CTRL2
1.8V
64
COEX_TXD
O
PD
Wireless coexistence between WWAN
and WiFi/BT modules, based on BT-SIG
coexistence protocol. UART transmit
signal(WWAN module side), Reserved
1.8V
65
ANTCTL3
O
PD
Tunable ANT CTRL3
1.8V
66
SIM1_DETECT
I
PU
SIM1 detect, internal pull up(390KΩ),
active high
1.8V
67
RESET#
I
PU
WWAN reset input, active low, internal
pull up(350KΩ)
1.8V
68
NC
-
-
NC
-
69
CONFIG_1
O
GND
GND, FM350 M.2 module is configured
as the WWAN –PCIe Gen3, USB3.1
Gen1 interface type
-
70
+3.3V
PI
-
Power input
Power Supply
71
GND
-
-
GND
Power Supply
72
+3.3V
PI
-
Power input
Power Supply
73
VIO_CFG
-
NC
Configuration of PCIe sideband signals
power domain
NC: support 1.8V/3.3V;
GND: support 3.3V
-
74
+3.3V
PI
-
Power input
Power Supply
75
CONFIG_2
O
NC
GND, FM350 M.2 module is configured
as the WWAN –PCIe Gen3, USB3.1
Gen1 interface type
-