HT1X_SDS

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Product short data sheet

COMPANY PUBLIC

Rev. 3.1 — 10 December 2014

210531

4 of 9

NXP Semiconductors

HT1x

HITAG 1 transponder IC

7.

Functional description

7.1 Memory map

The 2 kbit memory area of the HITAG 1 transponder IC is divided into 16 blocks. Each

block comprises 4 pages with 4 bytes (1 byte = 8 bits) each. A page is the smallest access

unit.

Addressing is done pagewise (page 0 to 63) whereas access is gained either pagewise or

blockwise by entering the respective start address.

Block access is only available for blocks 2 to 15, page access is available for pages 0 to

63.

Areas (or settings) with light dark background can be configured by the customer within

the Configuration Page (page 1 of block 0).

Fig 2.

Memory map

aaa-000324

read only

read/write

write only

one time programmable

neither read nor write

Serial Number

ro

r/w or ro

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

ro

r/w

wo

OTP

0