Specifications of the HT2 MOA3 S20

Rev. 1.1

1997-08-19

Ht2moa3.doc/HS

Page 13 of 22

5.2 Operation Modes and Configuration

With the Configuration Byte the operation mode and the access rights to the memory can be

selected. During Power-Up of the transponder the Configuration Byte is read from the

transponder’s EEPROM.

If you change the configuration, keys or passwords, you have to place the transponder

directly on the antenna or hold it directly to it (0-distance)! In order to avoid any errors

do not move the transponder during this write process and be sure that you are in a safe

environment without electrical noise.

5.2.1 Modes of Operation

The HITAG 2 can be operated in several modes.

Crypto Mode:

Mode for writing or reading the transponder with encrypted data transmission.

Password Mode:

Mode for writing or reading the transponder with plain data transmission.

A password check is performed.

Public Mode A (Manchester):

Read only mode emulating Philips Semiconductors´ MIRO transponders resp.

µEM H400x

transponders.

The 64 bits of the user Pages 4 and 5 are cyclically transmitted to the read/write device.

Public Mode B (Biphase):

Read only mode according to ISO standards 11784 and 11785 for animal identification.

The 128 bits of the user Pages 4 to 7 are cyclically transmitted to the read/write device.

Public Mode C (Biphase):

Read only mode emulating the read operation of the PCF793X (with a slightly different Program

Mode Check).

In the Public Mode C the 128 bits of the user Pages 4 to 7 are cyclically transmitted to the

read/write device.