Rainbow-electronics DS1904 Manual do Utilizador descarregar pdf (Página 10)

DS1904

10 of 12

READ/WRITE TIMING DIAGRAM Figure 9

Write-one Time Slot

15

µ

s

(

OD: 2

µ

s

)

60

µ

s

(

OD: 6

µ

s

)

DS1904

Sam

p

lin

g

V

PULLUP

V

PULLUP MIN

V

IH MIN

V

IL MAX

0V

t

SLOT

t

REC

t

LOW1

60

µ

s

≤

t

SLOT

< 120

1

µ

s

≤

t

LOW1

< 15

µ

s

1

µ

s

≤

t

REC

<

∞

RESISTO

MASTER

Write-zero Time Slot

15µs

RESISTOR

MASTER

(OD: 2µs)

DS1904

60µs

t

LOW0

Sampling Window

(OD: 6µs)

60 µs

≤

t

LOW0

< t

SLOT

< 120 µs

1 µs

≤

t

REC

<

∞

V

PULLUP

V

PULLUP MIN

V

IH MIN

V

IL MAX

0V

t

SLOT

t

REC

Read-data Time Slot

RESISTOR

MASTER

DS1904

Master

Sampling Window

60 µs

≤

t

SLOT

< 120 µs

1 µs

≤

t

LOWR

< 15 µs

0

≤

t

RELEASE

< 45 µs

1 µs

≤

t

REC

<

∞

t

RDV

= 15 µs

t

SU

< 1 µs

V

PULLUP

V

PULLUP MIN

V

IH MIN

V

IL MAX

0V

t

SLOT

t

REC

t

LOWR

t

SU

t

RDV

t

RELEASE

1 2 ... 5 6 7 8 9 10 11 12

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