DS2432 データシートの表示（PDF） - Maxim Integrated

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DS2432

1Kb Protected 1-Wire EEPROM with SHA-1 Engine

Maxim Integrated 

ABRIDGED DATA SHEET

ROM FUNCTIONS FLOW CHART Figure 9

From Memory and SHA-1

Functions Flow Chart

(Figure 7)

Bus Master TX ROM

Function Command

Bus Master TX

Reset Pulse

OD

N

Reset Pulse ?

OD = 0

Y

DS2432 TX

Presence Pulse

33h

N

Read ROM

Command ?

Y

RC = 0

DS2432 TX

Family Code

(1 Byte)

DS2432 TX

Serial Number

(6 Bytes)

DS2432 TX

CRC Byte

55h

N

Match ROM

Command ?

Y

RC = 0

F0h

N

Search ROM

Command ?

Y

RC = 0

Master TX Bit 0

DS2432 TX Bit 0

DS2432 TX Bit 0

Master TX Bit 0

Bit 0

N

Match ?

Y

Master TX Bit 1

N

Bit 0

Match ?

Y

DS2432 TX Bit 1

DS2432 TX Bit 1

Master TX Bit 1

Bit 1

Match ?

NN

Y

Bit 1

Match ?

Y

Master TX Bit 63

DS2432 TX Bit 63

DS2432 TX Bit 63

Master TX Bit 63

Bit 63

Match ?

NN

Y

RC = 1

Bit 63

Match ?

Y

RC = 1

To Memory and SHA-1 Functions

Flow Chart (Figure 7)

DS2432

From Figure 9, 2nd Part

To Figure 9

CCh

2nd Part

Skip ROM

Command ?

N

Y

RC = 0

To Figure 9

2nd Part

From Figure 9

2nd Part

9 of 17

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