Telit Wireless Solutions FN990 TLB Guide

FN990 TLB
HW Design Guide
1VV0301753 Rev. 1 – 2022-04-22
Telit Technical Documentation

FN990 TLB Hardware Design Guide
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Not Subject to NDA
APPLICABILITY TABLE
PRODUCTS
Description
FN990A28 3G / 4G / Sub-6 cellular module
FN990A40 3G / 4G / Sub-6 cellular module

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CONTENTS
APPLICABILITY TABLE 2
CONTENTS 3
1. INTRODUCTION 5
Scope 5
Audience 5
Contact Information, Support 5
Symbol Conventions 5
Related Documents 6
2. GENERAL PRODUCT DESCRIPTION 7
Overview 7
TLB View 8
TLB Description 10
Jumper Setting Guidelines 14
Antenna Ports 15
PCIe 15
2.6.1. End Point 15
2.6.2. Root Complex 16
Guidance for Evaluation Board 18
2.7.1. Bypass Setting 18
2.7.1.1. Jumper Setting for Bypass Mode 18
2.7.2. 6-15V Setting 19
2.7.2.1. Guidelines of ECO for 3.3V Output 20
3. COMPONENT ASSEMBLY DIAGRAM 21
Layout 23
4. SCHEMATICS 25
5. CHANGE LIST 26
6. PRODUCT AND SAFETY INFORMATION 27
Copyrights and Other Notices 27
6.1.1. Copyrights 27

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6.1.2. Computer Software Copyrights 27
Usage and Disclosure Restrictions 28
6.2.1. License Agreements 28
6.2.2. Copyrighted Materials 28
6.2.3. High Risk Materials 28
6.2.4. Trademarks 29
6.2.5. Third Party Rights 29
6.2.6. Waiwer of Liability 29
Safety Recommendations 30
7. GLOSSARY 31
8. DOCUMENT HISTORY 32

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1. INTRODUCTION
Scope
This document describes the FN990 TLB which is part of complete FN990 Development
Kit (Dev-Kit)
Audience
This document is intended for system integrators that are using the Telit module in their
product.
Contact Information, Support
For technical support please e-mail:
• TS-[email protected]
• TS-[email protected]om
• [e-mail]
• [e-mail]
Alternatively, use:
https://www.telit.com/contact-us/
For more information visit:
https://www.telit.com
Symbol Conventions
Danger:
This information MUST be followed or catastrophic
equipment failure or personal injury may occur.
Warning: Alerts the user on important steps about the module
integration.

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Note/Tip:
Provides advice and suggestions that may be useful when
integrating the module.
Electro-static Discharge:
Notifies the user to take proper grounding
precautions before handling the product.
Table 1: Symbol Conventions
All dates are in ISO 8601 format, that is YYYY-MM-DD.
Related Documents
•FN990 HW User Guide, 1VV0301752
•Telit EVB 2.0 HW User Guide, 1VV0301732
•FN990 AT Commands Reference Guide, 80691ST11097A

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2. GENERAL PRODUCT DESCRIPTION
Overview
The Translation Board (TLB) is custom designed to interface the variant of the Telit FN990
module with the Telit Generic Evaluation Board (EVB) thus forming the complete
Development Kit of FN990.
The TLB provides the mapping of Telit module signals and functions into the generic EVB
signals and functions.
The TLB design of the FN990 TLB includes the following items:
•FN990 module
•RF SMA connectors
•Board to Board connectors for interfacing to EVB main board
•Module specific circuitry which is not part of the generic circuitry of the EVB
The TLB also plans to assemble a custom designed module socket instead of assembling
the module.
The Power supply and control interface for the RF module is provided by the EVB via the
B2B connectors.
The bottom plane solder-mask is cutout under the RF module to optimally
mount/connect a heatsink with the aim to cool the module via the many heat conducting
GND via’s.
The board is designed to accommodate new modules according to the updated pin
mapping of the FN990 (52.0 x 30.0 x 2.25mm, +/- 0.15 mm tolerance and 75 pins).
Board
PCB Code
TLB
CS2146A-D
EVB 1.1
CS1984C
EVB 2.0
CS2125 or CS2148
Module
CS2170x
Table 2: Latest PCB reference numbers

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TLB View
The below pictures show the TLB top and bottom view.
FN990 TLB Top View
Figure 1: TLB Top View

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FN990 TLB Bottom View
Figure 2: TLB Bottom View

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TLB Description
Figure 3: TLB Description
(1) 1V8 AUX Power (PL216)
Figure 4: 1V8 AUX Power Default Jumper
The Jumper PL216 provides 1.8V I/O power for TLB circuit through external LDO.
Place jumpers on PL216 2-3(L) as shown Figure 5.
If PL216 1(P)-2 connected, FN990 internal power VREG_L6M_1P8 will be
supplied to TLB circuit.
(2) VBATT AUX Power (PL215)
The Jumper PL215 provides VBATT power for TLB circuit
Place jumpers on PL215 as default.
(3) PCIe Host Power (PL301/PL302)
wVBATT AUX Power (PL215)
q1V8 AUX Power (PL216)
e PCIe Host Power (PL301/PL302)
oUSB/PCIe Switch (SW201)
yWLAN Disable (PL201/PL217)
tPCIe 64 pin ConnectorrUSB 3.1 gen 2 Type C (PL214)
1) Power ON/OFF Switch (SW203)
iJumper for Other Model (PL214)
uLEDs (DL202/DL201)
1! Test Points for GPIOs

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By placing jumpers on PL301/PL302, VBATT main power will be supplied from/to
host/device as FN990 PCIe mode.
-Basically VBATT is supplied to FN990 from EVB.
-When FN990 operates as PCIe EP, VBATT can be supplied from host through
SO301. However, in that case, be sure to remove the VBATT connection via
EVB to prevent multiple power source is connecting.
-When FN990 operates as PCIe RC, VBATT can be supplied to device through
SO301.
Figure 5: PCIe Host Power
(4) USB 3.1 gen 2 Type C Connector (PL214)
FN990 M.2 Card supports USB 3.1 gen 2 by USB type C connector mounted on TLB.
(5) WLAN Disable (PL201/PL217)
Figure 6: WLAN Disable Jumper
FN990 can control RF status by W_DISABLE_N pin.
Place a jumper on PL201 (W_DISABLE_N): 4G/5G disable

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Place a jumper on PL217 (W_DISABLE2_N): GNSS disable – To be implemented.
Please refer to the AT commands guide for setting. (AT#PSMWDISACFG)
(6) LEDs (DL202/DL201)
Figure 7: Two LEDs for WAKE_ON_WAN_N and LED_N
- WAKE_ON_WAN_N
LED is ON (DL202): Normal
LED is OFF (DL202): Wake up event is occurred
Please refer to the AT commands guide for setting. (AT#PSMEVTCFG)
- LED_N
FN990 M.2 #10 pin is LED_N and it is connected to DL201 LED.
And LED_N is supported current sink.
(7) Jumper for Other Model (PL214)
Figure 8: Default Jumper for PL214
Change the jumper connection state only when connect FN980 HW1.0 instead of
FN990. Leave it as the default jumper.
(8) USB/PCIe Switch (SW201)
FN990 M.2 Card determines the host interface by checking the status of USB/PCIE
SWITCH pin at the beginning of power on sequences.
•USB(Default): USB 3.1 or USB 2.0
•PCIe: PCIe 3.0 + (USB 3.1 or USB 2.0)*
*USB interface is only used as debugging purposes when USB/PCIe Switch pin is
set to PCIe.
Switch SW201 USB as default.

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Figure 9: USB/PCIe Switch
(9) Power ON/OFF Switch (SW203)
Figure 10: Power ON/OFF Switch
- FULL_CARD_POWER_OFF_N
If SW203 switch on, the FN990 will turn on automatically when VBATT is supplied.
If SW203 switch off, FN990 will be turned off.

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Jumper Setting Guidelines
Figure 11: Default Jumper and Switch Setting of TLB with Silk
Jumper
Jumper Type
Set Position
Description
SW203
Switch
OFF
Power ON/OFF
PL301/PL302
2.54 mm
NC
PCIe Host Power
PL215
2.54 mm
1-2
VBATT Aux Power
PL216
2.54 mm
2-3(L)
1V8 AUX Power
PL214
2.54 mm
1-2, 3-4
Jumper for Other Model
SW201
Switch
USB
USB or PCIe mode
Table 3: Default Jumper and Switch Setting of TLB and Description

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Antenna Ports
Figure 12: Antenna Ports
Note:
For more detail information on Antenna ports, please refer to
FN990 HW User Guide, 1VV0301752, Chapter 7.1 Antenna Interface.
Warning:
Be careful not to damage
cables and RF connectors
assembly when connecting the Antenna cables.
PCIe
2.6.1. End Point
Set the switch (SW201) to PCIe as shown below.

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Figure 13: PCIe mode
Now FN990 will operated as PCIe EP by connecting it to the host using an extension cable.
Figure 14: PCIe extension
If you want to use USB as a network interface again, just set the switch to USB as shown
below and reboot the module.
Figure 15: USB mode
For technical supports and questions about PCIe interface, contact Telit Technical
Support at:
•
TS-[email protected]
• TS-[email protected]om
• [e-mail]
• [e-mail]
2.6.2. Root Complex
Since FN990 is made according to the m.2 card standard, it basically operates as EP.

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If you want to run FN990 as RC using PCIe 64pin connector, you need to move 4 optional
resistors referring to the figure below.
Figure 16: PCIe End Point
Figure 17: PCIe Root Complex

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Guidance for Evaluation Board
The EVB can be configured for different power supply sources depending on the required
use case.
2.7.1. Direct Supply Mode (Bypass)
Direct supply mode is for advanced users (typically, hardware designers) who need to
provide supply voltage directly to the module.
Note:
For more details, please refer to the 1VV301732 Telit EVB 2.0
User Guide, Chapter 4.5. 4-Wires Connection for DIRECT SUPPLY.

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2.7.2. DC-DC Mode (5-12V)
Figure 18: EVB 2.0 Jumper Setting for DC-DC mode
Note:
In order to use DC-DC mode, please place a jumper ‘12V PWR’.
Don’t need to switch 3.3 V / 3.8 V on EVB 2.0 because FN990 TLB is
SMART TLB. The voltage is automatically set (that is AVS, Automatic
Voltage Selection is implemented).
In via DC-DC mode, the wall adaptor connected to the jack can supply a voltage in the 5-
12V range. The regulator can accept up to 36V (42V absolute maximum) but, in this case,
the output voltage (VBATT) will not be properly regulated. For more details, please refer
to the 1VV301732 Telit EVB 2.0 User Guide, Chapter 4.4. Power Supply Requirements.

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Figure 19: Connecting a wall adaptor and Telit EVB 2.0