Application Circuits

Tag

A tag consists of a PCB (or Mylar film) with printed coil, HT6720 and a housing. The housing can be of various shapes.

Note: The value of the antenna inductance is 11mH, however the optimum value will be changed slightly due to the

variation of the internal resonance capacitor (10pF typically) during process.

For more application information about the reader, refer to Holtek¢s 13.56MHz RF ID reader data.

2-chip solution

HT6720

Rev. 1.00

4

August 13, 2001

Code Package

A total of 96 bits information can be stored in the

HT6720, from which 64 bits are customer programma-

ble.

Agent ID: This 8-bit wide code is not customer program-

mable and is supplied together with the data writer after

registering to Holtek. The writer generates the code au-

tomatically.

Customer ID: This area is for the Agent, for example

used to store current number of customer.

Category ID: Can be used to store the application field

information code.

Product ID: Storing the contents of the user ID number

or data.

Data CRC: A 16 bits of CRC code is generated automat-

ically by the writer.

H T 6720

E ner gy

Da t a

H o lt e k T r a n s p o n d e r S o lu t i o n

H o lt e k R e a d e r S o l u t io n

O t h e r C o n t r o lle r

RF o s c

&

Re c e i v e r

Da t a

De c o d e

&

Sys t e m

C ont r o l

Sp e c i a l

P u r pos e

C ont r o l l er

H o l t ek l o w co st M C U :

H T 48R 05A / H T 4 8R 06A

AN T

AN T

HF 2

HF 1

H T 6720

PC B

Ta g H o us i n g