MF1ICS50_001056

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Product data sheet

PUBLIC

Rev. 5.6 — 24 November 2010

001056

8 of 20

NXP Semiconductors

MF1ICS50

Functional specification

6.6.1 Manufacturer block

This is the first data block (block 0) of the first sector (sector 0). It contains the IC

manufacturer data. Due to security and system requirements this block is write protected

after having been programmed by the IC manufacturer at production.

6.6.2 Data blocks

All sectors contain 3 blocks of 16 bytes for storing data (Sector 0 contains only two data

blocks and the read-only manufacturer block).

The data blocks can be configured by the access bits as

increment and decrement for direct control of the stored value are provided.

An authentication command has to be carried out before any memory operation in order to

allow further commands.

6.6.2.1

Value Blocks

The value blocks allow to perform electronic purse functions (valid commands: read, write,

increment, decrement, restore, transfer).The value blocks have a fixed data format which

permits error detection and correction and a backup management.

A value block can only be generated through a write operation in the value block format:

in the lowest address byte. Negative values are stored in standard 2´s complement

format. For reasons of data integrity and security, a value is stored three times, twice

non-inverted and once inverted.

Fig 5.

Manufacturer block

Byte

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Serial Number

Check Byte

Manufacturer Data

x

x

x

x

x

x

x

x

LSB

MSB