DS2431 データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS2431

1024-Bit 1-Wire EEPROM

Dallas Semiconductor -> Maxim Integrated 

Figure 7-1. Memory Function Flow Chart

Bus Master TX Memory

Function Command

0Fh

N

Write Scratch-

pad ?

Y

Bus Master TX

TA1 (T7:T0), TA2 (T15:T8)

DS2431 sets

Sets PF = 1

Clears AA = 0

Sets E2:E0 = T2:T0

Master TX Data Byte

To Scratchpad

DS2431

Increments

E2:E0

N

Master

Y

TX Reset ?

N

E2:E0

=7?

Y

T2:T0

N

=0?

Y

PF = 0

DS2431 TX CRC16

of Command, Address,

Data Bytes as they were

sent by the bus master

DS2431: 1024-Bit, 1-Wire EEPROM

From ROM Functions

Flow Chart (Figure 9)

To Figure 7

2nd Part

Applies only if the

memory area is not

protected.

If write-protected, then

the DS2431 copies the

data byte from the tar-

get address into the SP.

If in EPROM mode,

then the DS2431 loads

the bitwise logical AND

of the transmitted byte

and the data byte from

the targeted address

into the SP.

Bus Master N

Master

RX “1”s

TX Reset ?

Y

To ROM Functions

Flow Chart (Figure 9)

From Figure 7

2nd Part

9 of 23

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