Elatec TWN4 MultiTech 3 BLE Versionshinweis

TWN4 MultiTech 3 BLE

Technical Handbook

DocRev7, June 17, 2020

Elatec GmbH

Contents

1 Introduction .............................................. 3

2 TWN4 MultiTech 3 BLE PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Dimensions ........................................... 5

2.3 Pinout .............................................. 6

2.3.1 USB (X1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3.2 Generic Interface (X2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3.3 UART (X3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4 Versions ............................................. 9

3 Bluetooth Low Energy (BLE) Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Power states and current consumption breakdown . . . . . . . . . . . . . . . . . . . . . . . . . 11

5 Disclaimer............................................... 13

Page 2 of 13

1 Introduction

The TWN4 MultiTech 3 BLE is a conﬁgurable Reader/Writer for RFID transponders. This addition to

the TWN4 family offers the Bluetooth Low Energy (BLE) interface. The module has both low (125kHz,

134.2kHz) and high (13.56MHz) frequency antennas, allowing the User access to a wide range of RFID

standards.

This Technical Handbook provides the details needed to get started using the TWN4 MultiTech 3 BLE: a

functional overview of the board, listing the features and interface options available.

A custom User App can be loaded onto the module using the AppBlaster software. For more information

regarding the programming of the TWN4 module please see a dedicated User Guide for AppBlaster.

Page 3 of 13

2 TWN4 MultiTech 3 BLE PCB

2.1 Functional Overview

The TWN4 MultiTech 3 BLE is a complete RFID Reader system that requires a 5V or 3.3V power source

and connection to a host to work. The majority of the circuitry responsible for processing the RFID card

information and executing the module ﬁrmware is shielded as shown on Figure 2.1. The device can be

connected to the host via USB interface. A more generic breakout interface to the main controller is

available; its pinout is shown in Table 2.2. The TWN4 MultiTech 3 BLE also offers a SAM slot and a

speaker on board.

The TWN4 MultiTech 3 BLE can interact with the User via Bluetooth Low-Energy interface. This develop-

ment pack contains documentation on BLE protocol and API implemented on the module.

Figure 2.1: TWN4 MultiTech 3 BLE View Functional

Page 4 of 13

2 TWN4 MultiTech 3 BLE PCB

2.2 Dimensions

Figure 2.2 provides the physical dimensions of the TWN4 MultiTech 3 BLE. All dimensions in mm unless

otherwise stated.

Figure 2.2: PCB Dimensions

Page 5 of 13

2 TWN4 MultiTech 3 BLE PCB

2.3 Pinout

2.3.1 USB (X1)

Pin Pin Name Function

1 UVCC USB VCC (5V)

2 USB_DM_P USB Data -

3 USB_DP_P USB Data +

4 NC not connected

5 UGND USB Ground

Table 2.1: Main USB connector (X1) Pin Conﬁguration

2.3.2 Generic Interface (X2)

The module provides a generic access port that allows the User to bypass the main USB connector and

interact with the TWN4 MultiTech 3 BLE microcontroller directly. The port name is X2 and the polarity of

its pins is shown in Figure 2.3. The pinout is provided in Table 2.2.

Figure 2.3: Connector X2

Page 6 of 13

2 TWN4 MultiTech 3 BLE PCB

Pin Pin Name Function

1 CAN_TX TTL TX pin of CAN interface. An external interface circuit is required.

2 CAN_RX TTL RX pin of CAN interface. An external interface circuit is required.

3 I2C_SCL Clock pin of I2C interface. No internal pull up.

4 I2C_SDA Data pin of I2C interface. No internal pull up.

5 SPI_MOSI Pin MOSI of SPI interface

6 SPI_MISO Pin MISO of SPI interface

7 SPI_SS- Pin SS- of SPI interface

8 SPI_SCK Pin SCK of SPI interface

9 V24_TXD RS232 TXD (Output)

10 HOSTSENSE Host channel selector: Low (connect to GND) = COM1 (no USB enumeration);

high (connect to VCC) = USB. This pin is internally pulled high.

11 V24_RXD RS232 RXD (Input)

12 GND Ground

13 UVCC USB VCC (5V)

14 USB_DM_P USB Data -

15 UGND USB Ground

16 USB_DP_P USB Data +

17 COM1_TX Low active TTL output (push/pull) of asynchronous TXD from COM1.

18 COM1_RX Low active TTL input with internal pull-up resistor of asynchronous RXD to

COM1.

19 VCC Direct access to 3.3V supply net after Regulator. Microcontroller and majority of

circuitry is powered by this.

20 GPIO4 I/O pin for general purposes.

21 GPIO5 I/O pin for general purposes.

22 GPIO6 I/O pin for general purposes.

23 PWRDWN- Low active TTL input with internal pull-up resistor for turning off the voltage reg-

ulator.

24 RESET- Low active TTL input with internal pull-up resistor for hard reset.

Table 2.2: Generic Interface (X2) Pin Conﬁguration

Page 7 of 13

2 TWN4 MultiTech 3 BLE PCB

2.3.3 UART (X3)

Pin Pin Name Function

1 +5V 5V supply

2 COM1_RX Low active TTL input with internal pull-up resistor of asynchronous RXD to COM1.

3 COM1_TX Low active TTL output (push/pull) of asynchronous TXD from COM1.

4 GND Ground

Table 2.3: UART connector (X3) Pin Conﬁguration

Page 8 of 13

2 TWN4 MultiTech 3 BLE PCB

2.4 Versions

Various versions of TWN4 MultiTech 3 are available: One full-featured version and three cost-optimized

versions which support LF (125kHz, 134.2kHz) and/or HF (13.56MHz) transponders. Table 2.4 lists the

different features of the corresponding model:

Feature TWN4 TWN4 TWN4 TWN4

MultiTech 3 BLE MultiTech 3 MultiTech 3 LF MultiTech 3 HF

LF √√√-

HF √√-√

BLE √- - -

Nr of SAM-Slots 1 1 - 1

Table 2.4: Different features of TWN4 MultiTech 3 Versions

Page 9 of 13

3 Bluetooth Low Energy (BLE) Feature

The traditional Bluetooth standard is convenient for constant-ﬂow media transfer applications such as video

streaming. The Bluetooth Low Energy standard was introduced for applications requiring a lower power

consumption proﬁle. Data is sent in bursts, followed by periods of electrical idle.

The TWN4 MultiTech 3 BLE uses the BGM121 module from Silicon Labs. The chip implements the

Physical, Link and L2CAP Layers of the BLE Protocol. The API is implemented within the ﬁrmware of

the main TWN4 microcontroller. The two chips interact via the COM2 port and GPIO7 (connected to Reset

of BGM121) of the TWN4 microcontroller, thereby making COM2 and GPIO7 unavailable for custom user

functions.

For more information regarding the Bluetooth Low Energy Standard please see document "Designing for

Bluetooth Low Energy" from Silicon Labs.

For the description of all the BLE-related commands available, please see the TWN4 API document.

Page 10 of 13

Inhaltsverzeichnis

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