HTMS8x01 datasheet(13/57 Pages) NXP

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HTMS1x01_8x01

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 17 October 2014

152933

13 of 57

NXP Semiconductors

HTMS1x01; HTMS8x01

HITAG µ transponder IC

9.2 Memory configuration

The user configuration block consists of one configurable byte (Byte0) and three reserved

bytes (Byte1 to Byte3)

The bits in the user configuration block enable a customized configuration of the HITAG µ

transponder ICs. In TTF mode the user can choose Bi-phase or Manchester encoding and

also the data rate for the return link (bit0 to bit2). In RTF mode data rate and coding are

fixed with 4 kbit/s Manchester encoding.

Fitting to ISO 11785 standard the default values are set for 4 kbit/s Bi-Phase encoding.

The next four bits (bit 3 to bit 6) are used for password settings.

Three areas (TTF area(128bit), lower 512 bits and upper memory) can be restricted to

read/write access.

The user configuration block (User Config) is programmable by using WRITE SINGLE

BLOCK command at address FFh. Bits 7 to 31 (Byte1 to Byte3) are reserved for further

usage.

The user configuration block (block address FFh) and the password block (block address

FEh) can be locked with the LOCK BLOCK command.

Attention:

• Pre-programmed default values are not locked !

• Configuration block has to be locked to make data unalterable!

• The lock of the blocks is permanently and therefore irreversible!

[1]

PWD(w)=1: read without password and write with password

[2]

PWD(r/w)=1: read and write with password

Table 8.

User configuration block to Byte0

Byte0

Description

bit6

bit5

bit4

bit3

bit2

bit1 ... 0

Bit-no.

PWD (r/w) [2]

Bit512… Max

PWD (w) [1]

Bit512… Max

PWD (w) [1]

Bit128… 511

PWD (w) [1]

Bit0… 127

Encoding

Data rate

0… MCH

1… Bi-Ph.

’00’… 2kbit/s

’01’… 4kbit/s

’10’… 8kbit/s

Value/meaning

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