DOTR-221 READER MODULE USER GUIDE D.O.Tel Co., Ltd. #412, Kolon Science Valley 2nd 811 Gurodong, SEOUL, KOREA 152-878 Copyright 2008 Note: FCC Section 15.21 "Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
Chapter 1 INTRODUCTION The DOTR-221 module is a compact UHF RFID reader module which is compliant with the ISO-18006C (EPC class1 Gen2) protocol. It is intended to be used in conjunction with the accompanying antenna and a host computer (not supplied). The small physical size allows the module to be easily integrated with a mobile host computer, such as a Personal Digital Assistant. The module is designed to be operated off a single cell lithium ion battery, and has two host interface options: USB and UART.
Chapter 2 Specifications Mechanical Characteristics Dimension: 44mm X 44mm X 8.1mm Weight: 20g approx.
Electrical Specifications ABSOLUTE MAXIMUM RATING: Power Supply Voltage: 4.2V DC max Control / UART port voltage: -0.3 ~ +3.9VDC USB pin Voltage; -0.3 ~ +5.3VDC Operating Temperature: 55 deg C Storage Temperature: -40 to 70 deg C (non-operating) Note: Stress above the maximum rating may cause permanent damage. Exposure to the maximum rating for extended periods may degrade reliability. Performance Characteristics Summary Power Supply Voltage: 3.4V to 4.2V DC Power Consumption: 1.2A max. RF Output Power: 0.
DETAILED ELECTRICAL SPECIFICATIONS 1. RF FREQUENCY CHANNELS CHANNEL CHANNEL FREQ (MHz) 1 902.75 26 2 903.25 27 3 903.75 28 4 904.25 29 5 904.75 30 6 905.25 31 7 905.75 32 8 906.25 33 9 906.75 34 10 907.25 35 11 907.75 36 12 908.25 37 13 908.75 38 14 909.25 39 15 909.75 40 16 910.25 41 17 910.75 42 18 911.25 43 19 911.75 44 20 912.25 45 21 912.75 46 22 913.25 47 23 913.75 48 24 914.25 49 25 914.75 50 FREQ (MHz) 915.25 915.75 916.25 916.75 917.25 917.75 918.25 918.75 919.25 919.75 920.25 920.75 921.25 921.
CHAPTER 3 HOST INTERFACE 3.1 CONNECTION PIN 1 2 3 4 5 6 7 8 9 10 11 NAME BAT BAT USB_M USB_P GND GND GND TXD RXD GP0 GP1 I/O In In I/O I/O Common Common Common Out In In In 12 USB 5V In Description VCC SUPPLY , +3.7V input VCC SUPPLY , +3.7V input USB Interface USB Interface Ground Ground Ground UART TX Data UART RX Data Enable (Applying 3.3V will enable the module) Reserved for FACTORY USE. DO NOT CONNECT TO ANYTHING. USB Vbus Voltage (+5V). This pin is for sensing the USB Host only.
fixed at 115.2kbps and no handshaking (8 data bits, no parity, 1 stop bit). Details for communication protocols are described in the software chapter. 3.3 USB Interface The module provides full speed compliant USB interface (12Mbps). Note: The module is set to communicate via UART port at the factory.
CHAPTER 4 Operation 4.1 Antenna Connection A good antenna must be connected before applying power. The antenna must have a low VSWR value (less than 1.25) in the entire frequency range of 902 through 928MHz to ensure maximum read range performance. Care should be taken when connecting the antenna cable to the antenna connector, as the antenna connector is very small and fragile. 4.2 Power Supply The reader module is designed to operate off 3.
interface, UART communication is the default mode of communication with the host. 4.5 USB port Pin 3 (USB-M), Pin 4 (USB-P) and Pin 12 (USB +5V) provide connection to a USB host at full speed. USB +5V line is used to detect the USB host and does not consume power. 4.6 Installation of software 4.6.1 Application software package The application software consists of several dlls and applications. These are rfidhost.inv.exe, rfidhost.test.exe, cpl.dll, rfidtx.dll, rfid.dll and profiler.dll.
CHAPTER 5 Quality Policy D.O.Tel’s quality policy is that we are committed to meet and exceed our customer’s requirements and expectations of all our products and services. We strive to understand, maintain, communicate and continually improve our quality management system. CUSTOMER SERVICE CENTER #412, Kolon Science Valley 2nd 811 Gurodong, SEOUL, KOREA 152-878 PHONE: 82-2-850-3636 FAX: 82-2-850-3637 e-mail: dotel@dotel.co.
- Additional Page Cautions Modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. FCC compliance Information This device complies with part 15 of FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received. Including interference that may cause undesired operation.
