Rainbow-electronics DS2417 Manual do Utilizador descarregar pdf (Página 12)

DS2417

12 of 15

READ/WRITE TIMING DIAGRAM (continued) Figure 9

Read-data Time Slot

RESISTOR

MASTER

DS2417

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

CRYSTAL PLACEMENT ON PCB Figure 10

X2

GUARD RING

ON SIGNAL

PLANE

PLANE BENEATH

LOCAL GROUND

SIGNAL PLANE

OR ON OTHER

SIDE OF PCB

CRYSTAL

PADS

GND

X1

1-Wire

V

DD

INT\

1 2 ... 7 8 9 10 11 12 13 14 15

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