DS1994 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS1994

4Kb Plus Time Memory iButton®

Maxim Integrated 

Figure 13. TYPE 1A INTERRUPT (SPECIAL CASE)

V PUP

RESET

PULSE

1-W IR E

BUS

GND

PRESENCE

PULSE

INTERRUPT PULSE

960µs - 3840µs

VIH OF DS1994

PRESENCE

PULSE

Interrupt condition occurs during the presence pulse, but the interrupt is not generated

until the presence pulse is completed.

Figure 14. TYPE 2 INTERRUPT

V PUP

1-W IR E

BUS

GND

INTERRUPT PULSE

960µs - 4800µs

PRESENCE

PULSE

Interrupt condition exists prior to master releasing reset.

Figure 15. TYPE 2 INTERRUPT (SPECIAL CASE)

V PUP

1-W IRE

BUS

GND

PRESENCE

PULSE

IN TE R R U P T P U LS E

960µs - 3840µs

PRESENCE

PULSE

Interrupt condition occurs w hile

the bus is pow ered dow n.

Bus powers up.

LINE TYPE LEG END:

B us m aster active low

Both bus m aster and

D S 1994 active low

D S 1994 active low

R esistor pullup

DS1994

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