Operational Description

FCC ID: WP5TWN3I1

Operational Description

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FCCID_1038357

Elatec TWN3 HID iClass

Functional Description

1. General
The TWN3 HID iClass is an integrated device for contactless read/write operations
on a transponder, i.e. a transponder card.

2. Description
Please refer to the block diagram and the manual for better understanding of the
description.

2.1. Power Supply
The device is supplied with power via the the communication cable. In case of USB,
the device is directly supplied from the USB bus. The voltage is 5V nominal, but the
valid range for a USB device, which is 4.3V to 5.5V is tolerated.

2.2. Host Communication
Data communication with the host is accomplished with either USB or RS232. In
case of USB, the device acts as a full speed (12Mbit/s) device. In case of RS232 the
standard data rate is 9600 Baud.

2.3. Interface Processor
The micro controller AT89C513xA acts as protocol converter (“interface processor”).
It converts the data stream from the host controller to appropriate commands for the
HID iClass reader module. On the other side, data coming form the reader module is
converted into the appropriate format for the host.
Furthermore, the interface processor takes over control of speaker and the red and
the green signal LED.

2.4. Reader Module
The HID iClass reader module HID OEM50 handles the transceiver functionality for
contactless communication with a transponder at a frequency of 13.56MHz.
Modulation is ASK 100% or ASK 10% according to the supported standards
ISO14443B or ISO15693.

2.5. Oscillators
The device is equipt with two oscillators. The interface processor is clocked with
24MHz, HID iClass reader module OEM50 is clocked with 13.56MHz.

Document Created: 2008-11-24 09:50:26
Document Modified: 2008-11-24 09:50:26

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