DS1992L-F5 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated

Part Name

Description

Manufacturer

DS1992L-F5

1kb/4kb Memory iButton

Dallas Semiconductor -> Maxim Integrated 

Figure 9. ROM FUNCTIONS FLOW CHART

Master TX

R eset P ulse

DS199X TX

P resence P ulse

Master TX ROM

Function Com m and

33H

N

Read ROM

Command

?

Y

55H

Match ROM

N

Command

?

Y

F0H

Search RO M

N

Command

?

Y

DS1992/DS1993

CCH

N

Skip RO M

Command

?

Y

DS199X TX

Fam ily Code

1 Byte

DS199X TX

Serial Num ber

6 Bytes

M aster TX B it 0

DS 199X TX B it 0

DS 199X TX B it 0

M aster TX B it 0

B it 0

N

Match ?

Y

M aster TX B it 1

N

B it 0

Match ?

Y

DS 199X TX B it 1

DS 199X TX B it 1

M aster TX B it 1

Bit 1

NN

Match ?

Y

B it 1

Match ?

Y

DS199X TX

CRC Byte

M aster TX B it 63

DS 199X TX B it 63

DS 199X TX B it 63

M aster TX B it 63

B it 63

NN

Match ?

Y

Bit 63

Match ?

Y

Master TX Mem ory

Function Com m and

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