Timing & Code Package

Application Circuits

Tag

A tag consists of a PCB (or Mylar film) with printed coil, HT672B and a housing. The housing can be of various shapes.

Note:

The value of the antenna inductance is 11

mH, 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

HT672B

Rev. 1.10

4

November 23, 2004

O n e P a c k a g e F o r m a t

P r o d u c t

C o d e

C u s t o m e r

I D

( 1 2 b i t s )

( 2 0 b i t s )

S y n c . D a t a

( 8 b i t s )

C h e c k

S u m

Code Package

A total of 40 bits information can be stored in the HT672B,

from which 20 bits are customer programmable.

(which low/high duty length is 50%)

programmable and is supplied together with the data

writer after register to Holtek. The writer generates the

code automatically.

number or data.

automatically by the writer.

H F

H F 1

H T 6 7 2 B

P C B

T a g H o u s i n g

H T 6 7 2 B

E n e r g y

D a t a

H o l t e k T r a n s p o n d e r S o l u t i o n

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

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

R F o s c

&

R e c e i v e r

D a t a

D e c o d e

&

S y s t e m

C o n t r o l

S p e c i a l

P u r p o s e

C o n t r o l l e r

H o l t e k l o w c o s t M C U :

H T 4 8 R 0 5 A - 1 / H T 4 8 R 0 6 A - 1

A N T

A N T