HT2X_SDS

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© NXP Semiconductors N.V. 2014. All rights reserved.

Product short data sheet

COMPANY PUBLIC

Rev. 3.1 — 3 November 2014

210431

4 of 9

NXP Semiconductors

HT2x

HITAG 2 transponder IC

7.

Functional description

7.1 Overview of transponder

7.2 Memory map

The 256 bit memory area of the HITAG 2 transponder IC is divided into 8 pages. Each

page has a size of 32 bits.

Depending on the operation mode (crypto mode/password mode) the memory is

organized as described in the following:

Table 3.

Overview of transponders

Parameter

Description

Unit

carrier frequency

125

kHz

coding read

Manchester/Biphase

-

coding write

Pulse duration

-

modulation

ASK (amplitude shift keying)

-

total memory size

256

bit

user memory read/write

128

bit

read only serial number

32

bit

data retention

10

year

data security

encryption, authentication, passwords

-

data integrity

half-duplex handshake, reverse data transmission

-

Table 4.

Memory map in Crypto Mode

Page

Content

Access

0

serial number

ro

1

secret key low (32 bit)

r/w or 0

2

secret key high (16 bit)

reserved bit (14 bit)

r/w or ro

3

configuration (8 bit)

password tag (24 bit)

r/w or ro

4

usable memory page

r/w or ro

5

usable memory page

r/w or ro

6

usable memory page

r/w or ro

7

usable memory page

r/w or ro