SLE66R01PC datasheet(33/55 Pages) INFINEON

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SLE 66R01P / SLE 66R01PN

16-bit Value Counter Functionality

Data Book

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2011-11-24

For an example: the value 1000

D = 03E8H -> Value Counter LS Byte = E8H and Value Counter MS Byte = 03H.

The Value Counter block looks like: Byte3 .. Byte0 = 000317E8

H; where 00H represents the data in byte3.

The temporarily double saving means that Value Counter is stored twice in two different memory blocks. Figure 17

shows an example for the Value Counter representation and the decrementing of the value 1000

D by 1D.

During the programming process of the new Value Counter, one block holds the current valid value and the other

block is used to write the new counter value. At the end of programming cycle the current valid value, becomes

an invalid value while it is erased (all bytes set to FF

H) and the other one holds the new valid value.

Figure 17

Value Counter decrement example

6.2

Loading and Reading of Value Counter

Loading of the Value Counter is done by either:

•

Using WR2B command to address 22

– [A1

H] [22H] [CNT0H, CNT0H, CNT1H, 00H, FFH, FFH, FFH, FFH] [CRC0H, CRC1H]

•

Using two WR1B commands to address 22

H and 23H:

– [A2

H] [22H] [CNT0H,CNT0H,CNT1H, 00H] [CRC0H, CRC1H]

– [A2

H] [23H] [FFH,FFH,FFH,FFH] [CRC0H, CRC1H]

•

It is also possible to use Compatibility Write command to initialize the counter, but this is not recommended.

It is crucial to initialize both Value Counter blocks for the correct counter operation.

Reading of Value Counter is done by either:

•

Using RD2Bcommand to addresses 22

– [31

H] [22H] [CRC0H, CRC1H]

•

Using RD4B command to addresses 22

– [30

H] [22H] [CRC0H, CRC1H]

•

Using DCR16 command with parameter 0000

– [D0

H] [0000H] [CRC0H, CRC1H]

E8H

st step

Block

22H

Block

23H

17H

03H

00H

FFH

valid counter

(start value)

E8H

nd step

Block

22H

Block

23H

17H

03H

00H

E7H

18H

03H

00H

valid counter

(start value)

valid counter

(new value)

FFH

3rd step

Block

22H

Block

23H

FFH

E7H

18H

03H

00H

erase

valid counter

(new value)

Value Counter decrement example

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