Specifications of the HT1 MOA3 S30

Rev. 1.1

1997-08-19

Ht1moa3.doc/HS

Page 12 of 24

5 Functional Description of HITAG 1

5.1 Memory Organization

The 2 kBit EEPROM memory on the transponder is divided into 16 blocks.

Every block consists of 4 pages. A page is the smallest access unit.

Every page consists of 4 bytes (at 8 bits).

Block access is only available for Blocks 2-15, page access is available for Pages 0-63.

read only

read/write

write only

one time programmable

neither read nor write

ro

r/w

wo

OTP

0

Serial Number

Logdata 1B

Logdata 0A

Logdata 1A

Logdata 0B

Configuration

Key A

Key B

Block 1

Block 4

Block 7

Block 8

Block 15

user data

user data

user data

Block 0

Configuration of the memory is

done in the configuration page

secret

secret

or

public

public

public

r/w

or

OTP

r/w

or

0

wo or 0

r/w

secret

Areas (or settings) with light dark background may be configured by the OEM client using the

Configuration Page (Page 1).

Memory locations marked with "secret" can only be accessed after a mutual authentication. An

enciphered data communication is used in that area.

Memory locations marked with "public" can be accessed without mutual authentication, no

encryption is used.

Block 0 includes the unique serial number (programmed during the production process), the

Configuration Page (configuration of the memory area) and the keys, Block 1 includes the

logdata.