MF1ICS70_043544

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Product data sheet

PUBLIC

Rev. 4.4 — 25 November 2010

043544

9 of 20

NXP Semiconductors

MF1ICS70

Functional specification

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.

6.6.3 Sector trailer

Each sector has a sector trailer. Due to the memory configuration of the MF1ICS70 this

sector trailer is located in block 3 of each sector in the first two kByte of the NV-memory

respectively in block 15 of each sector in the upper 2 kByte of the 4 kByte NV-memory.

Each sector trailer holds the

The access bits also specify the type (read/write or value) of the data blocks.

If key B is not needed, the last 6 bytes of the sector trailer can be used as data bytes.Byte

9 of the sector trailer is available for user data. For this byte the same access rights as for

byte 6, 7 and 8 apply.

All keys are set to FFFFFFFFFFFFh at chip delivery.

Fig 6.

Value blocks

Byte Number

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Description

Adr

Value

Value

Value

Adr

Adr

Adr

Fig 7.

Sector trailer

Byte Number

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Description

Key A

Access Bits

Key B (optional)