DS1992 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS1992

1Kb/4Kb Memory iButton

Maxim Integrated 

Figure 6. MEMORY FUNCTIONS FLOW CHART (continued)

DS1992/DS1993

From Figure 6

55H

Copy

N

First Part

Scratchpad

?

Y

Bus Master TX

TA1 (T7:T0)

Bus Master TX

TA2 (T15:T8)

Bus Master TX

E/S Byte

Authorization N

Code Match

?

Y

AA = 1

DS199x TX "1"s

DS199x Copies

Scratchpad Data

To Memory

DS199x TX "0"s

N Bus Master

TX Reset

?

Y

F0H

Y

Read Memory

?

N

Bus Master TX

TA1 (T7:T0)

Bus Master TX

TA2 (T15:T8)

DS199x sets Memory

Address = (T15:T0)

Master RX Data

Byte From

Memory Address

DS199x

Increments

Address Counter

Y

Bus Master

TX Reset

?

N

Bus Master N

TX Reset

?

Y

N Memory

Address

= 21Dh ?

Y

Bus Master

RX "1"s

To Figure 6

First Part

8 of 17

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