Specifications of the HT1 MOA3 S30

Rev. 1.1

1997-08-19

Ht1moa3.doc/HS

Page 13 of 24

Blocks 4 to 7 can be used either as secret or public areas (configurable), and Blocks 2 to 7 either

as read / write or read only areas (configurable). You can also modify keys and logdata and

prevent them from being accessed.

Finally the Configuration Page itself can be set to read only.

It is extremely important to be particularly careful when using the Configuration Page (it

only can be set to read only once!), keys and logdata as you can lose access to the secret

area on the transponder in case of a mistake.

ATTENTION:

Changing of the Configuration Page (Page 1), Keys and Logdata must be done in secure

environment. The transponder must not be moved out of the communication field of the

antenna during programming! We recommend to put the transponder close to the antenna

(zero-distance) and not to remove it during programming.

5.2 Anticollision

Anticollision Mode in long range applications including HITAG 1 transponders permits you to

process several transponders simultaneously. Theoretically up to 2

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transponders can be

processed simultanously. In practice this number is limited, because of the mutual influence of the

transponders - they detune each other, if there are too many too close to each other.

The currently used read/write device must also support full anticollision feature (e.g. HTRM800).

For read/write devices without that feature only one transponder is handled even if there are

several transponders within the communication field of the antenna. In this case either no

communication takes place or the "stronger" or closer transponder takes over.

By muting a selected transponder (HALT Mode) another transponder that is to be found in the

communication field of the antenna can be recognized.