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HTRM800

HITAG long range reader module hardware

Philips Electronics 

Philips Semiconductors

HITAG long range reader module

hardware

7 FUNCTIONAL DESCRIPTION

handbook, full pagewidth

POWER

SUPPLY

HOST

SYSTEM

HTRM800

Product specification

HTRM800 family

HITAG 1

transponders

antenna

I/O FUNCTIONS

Fig.3 System overview.

HITAG 2

transponder

MGU419

7.1 System overview

The HITAG long range reader module (see Fig.3) is a part

of a complete Radio Frequency Identification (RFID)

system which consists of:

• Transponders

• Antenna

• Host system

• I/O functions

• Power supply.

7.1.1 TRANSPONDERS

The HTRM800 can communicate with transponders based

on Philips HITAG 1 and HITAG 2.

7.1.2 ANTENNA

The antenna is an important part of the HITAG long range

system. The antenna must provide energy and data

transmission between the reader module and transponder.

7.1.3 HOST SYSTEM

The connection to the host system (e.g. microcontroller

or PC) is a serial interface on RS232 level for data

transmission.

7.1.4 I/O FUNCTIONS

One line of the HTRM800 is wired as input from e.g. a

switch and one line as output to drive a LED.

7.1.5 POWER SUPPLY

The HTRM800 must be supplied from an external power

supply with +15 V and −15 V (see Section 10.3).

7.2 Reader module software

Software command names mentioned in this data sheet

are fully described in document “HTCM400, HTRM440

Family, HTRM800 Family Interface Protocol Reader -

Host”.

7.3 Reader module hardware

7.3.1 MICROCONTROLLER

The microcontroller is placed on the HITAG core module

(see Fig.1) and processes the protocol for the

communication between the transponders and the reader

module. The interface signals are converted so that the

transponders are able to process them and the outgoing

signals from the transponders are converted into

interface-compatible signals.

The second essential microcontroller function is its control

function. The microcontroller activates and deactivates the

transmitter and switches the receiver between the modes

for the different transponders reception.

Additional functions of the microcontroller are controlling

the standby mode of the amplifier, detection of detuned or

broken antennas (antenna malfunction) and controlling of

the input and output for general purpose.

2001 Oct 04

6

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