DS1992L-F5 Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS1992L-F5

1kb/4kb Memory iButton

Dallas Semiconductor -> Maxim Integrated 

Figure 6. MEMORY FUNCTIONS FLOW CHART

DS1992/DS1993

Master TX Memory

Function Command

0FH

Write

N

Scratchpad

?

Y

Bus Master TX

TA1 (T7:T0)

AAH

Read

Scratchpad

?

Y

Bus Master RX

TA1 (T7:T0)

To Figure 6

Second Part

Bus Master TX

TA2 (T15:T8)

Bus Master RX

TA2 (T15:T8)

DS199X sets Scratchpad

Offset = (T4:T0) and

Clears (PF, OF, AA)

Master TX Data Byte

To Scratchpad Offset

Master RX Ending

Offset with Data

Status (E/S)

DS199X Sets

Scratchpad

Offset=(T4:T0)

DS199X sets (E4:E0)

= Scratchpad Offset

Master RX Data

Byte From

Scratchpad Offset

Bus Master Y

DS199X Increments

Scratchpad Offset

N

TX Reset

?

N

Scratch-

pad Offset =

Bus Master Y

TX Reset

DS199X Increments

Scratchpad Offset

?

N

11111b ?

Y

Partial Y

Byte Written

?

N

Scratch-

pad Offset =

11111b ?

Y

Y

Bus Master

TX Data

N

PF = 1

Bus Master

RX "1"s

OF = 1

?N

N

Bus Master

TX Reset

?

Y

DS199X TX

Presence Pulse

(See Figure 9)

From Figure 6

Second Part

7of 7

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