NXP Semiconductors

MF1S70YYX_V1

MIFARE Classic EV1 4K - Mainstream contactless smart card IC for fast and easy solution development

MF1S70yyX_V1

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Product data sheet

Rev. 3.2 — 23 November 2017

COMPANY PUBLIC

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001aan010

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NUID

Manufacturer Data

Block 0/Sector 0

2

1

Byte

0

Figure 6. Manufacturer block for MF1S503yX with 4-byte NUID

001aam204

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UID

Manufacturer Data

Block 0/Sector 0

2

1

Byte

0

Figure 7. Manufacturer block for MF1S500yX with 7-byte UID

8.6.2 Data blocks

One block consists of 16 bytes. The first 32 sectors contain 3 blocks and the last 8

sectors contain 15 blocks 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

• read/write blocks

• value blocks

Value blocks can be used for e.g. electronic purse applications, where additional

commands like increment and decrement for direct control of the stored value are

provided

A successful authentication has to be performed to allow any memory operation.

Remark: The default content of the data blocks at delivery is not defined.

8.6.2.1 Value blocks

Value blocks allow performing electronic purse functions (valid commands are: read,

write, increment, decrement, restore, transfer). 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 value block format:

• Value: Signifies a signed 4-byte value. The lowest significant byte of a value is stored

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.

• Adr: Signifies a 1-byte address, which can be used to save the storage address of a

block, when implementing a powerful backup management. The address byte is stored

four times, twice inverted and non-inverted. During increment, decrement, restore and

transfer operations the address remains unchanged. It can only be altered via a write

command.

001aan018

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Byte Number

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adr

adr

adr

adr

value

value

value

Description

Figure 8. Value blocks