DS1992 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS1992

1Kb/4Kb Memory iButton

Maxim Integrated 

Figure 9. ROM FUNCTIONS FLOW CHART

Master TX

Reset Pulse

DS199x TX

Presence Pulse

Master TX ROM

Function Command

33H

N

Read ROM

Command

?

Y

55H

Match ROM

N

Command

?

Y

F0H

Search ROM

N

Command

?

Y

DS1992/DS1993

CCH

N

Skip ROM

Command

?

Y

DS199x TX

Family Code

1 Byte

DS199x TX

Serial Number

6 Bytes

Master TX Bit 0

DS199x TX Bit 0

DS199x TX Bit 0

Master TX Bit 0

Bit 0

N

Match ?

Y

Master TX Bit 1

N

Bit 0

Match ?

Y

DS199x TX Bit 1

DS199x TX Bit 1

Master TX Bit 1

Bit 1

NN

Match ?

Y

Bit 1

Match ?

Y

DS199x TX

CRC Byte

Master TX Bit 63

DS199x TX Bit 63

DS199x TX Bit 63

Master TX Bit 63

Bit 63

NN

Match ?

Y

Bit 63

Match ?

Y

Master TX Memory

Function Command

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