LTE Series (A) DB with LTE-FDD/TDD and GNSS Support

Introduction #

This document introduces the LTE (A) Series evaluation boards which is a high performance board to start working with many LTE modules that this product supports. This document can help to quicky understand features, interfaces, electrical characteristics and mechanical details of the supported products. This document is applicable to the variants and products listed on table 1.

Model	Description	EICUT Part NO.
EC200U-EU LTE Ser(A) Evaluation Board	• Based on Quectel EC200UEUAB module • LTE CAT1 2G, GNSS, Bluetooth	E0270
EC200A-EU LTE Ser(A) Evaluation Board	• Based on Quectel EC200AEUHA module • LTE CAT4 3G 2G, Diverse Antenna	E0260
EC25-EUX LTE Ser(A) Evaluation Board	• Based on Quectel EC25EUX module • LTE CAT4 3G 2G, Diverse Antenna	E0200
SLM320E LTE Ser(A) Evaluation Board	• Based on MeiG Smart SLM320E module • LTE CAT1 2G, GNSS, Bluetooth	E0675
SLM770A LTE Ser(A) Evaluation Board	• Based on MeiG Smart SLM770A module • LTE CAT1 / 2G / GNSS / Bluetooth	E0261

Product Overview #

General Description #

The LTE Series (A) EVB is a wireless communication development board that can be used for educational purposes or as a part of a final product. This board supports LTE-TDD and LTE-FDD, also it can support GNSS and Bluetooth due to the selected variant that was indicated on Table.

Key Features #

Feature	Details
Power Supply	• Supply voltage via USB-C or pin-header • Voltage range: 4.5–5.5 V • Typical: 5 V
Cellular Features	• LTE-FDD & LTE-TDD support • GSM/GPRS, Max. 85.6 kbps (DL) / 85.6 kbps (UL) • 3G support for some variants • SMS & Call support
GNSS	• GPS / GLONASS / Galileo / BDS / QZSS constellations • Available on EC200U, EC25, and SLM320E only
Bluetooth	• Available on EC200U, EC25, and SLM320E only
Other Interfaces	• USB 2.0 port (slave mode only) • 14-pin header • Nano SIM (USIM) • SD Card • U.FL antenna connectors • LED indicators • Power Key switch, Reset switch, BOOT switch
Physical Characteristics	• Size: — • Weight: —
Temperature Ranges	• Operating: −35 °C to +75 °C • Extended: −40 °C to +85 °C • Storage: −40 °C to +90 °C
RoHS	• All hardware components are fully compliant with EU RoHS directive

Interface Overview #

Following Figure indicates the interface definitions of the LTE Series(A) EVB series.

Item NO.	Interface	Reference No.	Description
1	Sim Card	SIM1	Nano SIM connector; compatible with all USIMs.
2	SD Card	SD CARD	TF (Micro SD) card for data R/W via AT commands or Open CPU.
3	Push Button	SW1	USB BOOT selection for flashing and debugging.
4	Push Button	SW2	RESET option; connected to the module’s RESET pin.
5	Push Button	SW3	POWER KEY to power up the LTE module; works only when the “J1” jumper cap is not present.
6	Jumper Cap	J1	POWER KEY. When present, the module powers on when board power is applied.
—	14 Pin-Header	J2	14-pin expansion I/O connector.
—	BT/Div Antenna	Wi-Fi/BT or Div	For EC25, EC200U, SLM320: connected to on-board Wi-Fi/BT SMD chip antenna. For EC200A, SLM770A: connected to IPEX UFL as diversity antenna.
—	GNSS Antenna	GNSS ANT	Active antenna IPEX-UFL; only for EC25, EC200U, SLM320.
—	Main Antenna	MAIN ANT	IPEX UFL for main cellular antenna connection.
—	LED	D3	Connected to STATUS pin on LTE module (active-low).
—	LED	D2	Connected to NET STATUS pin on LTE module (active-high).
—	LED	D1	Connected to NET MODE pin on LTE module (active-high).
—	LTE Module	U21	Main LTE module.
—	USB TYPE-C	USB	Used for both power supply and USB device data with the LTE module.
—	Jumper Cap	J3	Connected to the module’s VBUS pin; enables/disables the module’s USB device.