Specifications of the HT2 MOA3 S20

Rev. 1.1

1997-08-19

Ht2moa3.doc/HS

Page 15 of 22

5.2.3 Configuration

The Configuration Byte is represented by the first 8 bits of Page 3 of the transponder memory.

Configuration Byte:

7

654

3210

0: Manchester Code

1: Biphase Code

Bit 2

Bit 1

Version

Coding

Coding in

HITAG 2-Operation

0

0

Public Mode

B

biphase

depending on bit 0

0

1

Public Mode

A

manchester

depending on bit 0

1

0

Public Mode C biphase

depending on bit 0

1

1

HITAG 2

depending on bit 0

depending on bit 0

0: password mode

1: crypto mode

0: PAGE 6 and 7 read/write

1: PAGE 6 and 7 read only

0: PAGE 4 and 5 read/write

1: PAGE 4 and 5 read only

THE SETTING OF THIS BIT IS OTP !

0: PAGE 3 read/write

1: PAGE 3 read only; Configuration Byte and Password TAG fixed

THE SETTING OF THIS BIT IS OTP !

0: PAGE 1 and 2 read/write

1: PAGE 1 no read/no write

PAGE 2 read only (when transponder is in password mode)

PAGE 2 no read/no write (when transponder is in crypto mode)

Configuration Byte / Bit 6:

Bit 6 = ‘0’: Page 3 is read/write.

Bit 6 = ‘1’: Page 3 can only be read. This process is irreversible !

ATTENTION: Do not set Bit 6 of the Configuration Byte to ‘1’ before having written the

final data into Page 3 (including the Configuration Byte and Password TAG) of the

transponder.

Configuration Byte / Bit 7:

Bit 7 = ‘0’: Pages 1 and 2 are read/write.

Bit 7 = ‘1’: Pages 1 and 2 are locked against writing. This process is irreversible !

ATTENTION: Do not set Bit 7 of the Configuration Byte to ‘1’ before having written the

final data into Pages 1 and 2 of the transponder.