Rainbow-electronics DS1996 Manual do Utilizador descarregar pdf (Página 18)

DS1996

18 of 18

AC ELECTRICAL CHARACTERISTICS OVERDRIVE SPEED (-40°C to 70°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Time Slot t

SLOT

6 16 µs

Write 1 Low Time t

LOW1

1 2 µs

Write 0 Low Time t

LOW0

6 16 µs

Read Data Valid t

RDV

exactly 2 µs

Release Time t

RELEASE

0 1.5 4 µs

Read Data Setup t

1 µs 5

Recovery Time t

REC

1 µs

Reset Time High t

RSTH

48 µs 4

Reset Time Low t

RSTL

48 80 µs

Presence Detect High t

PDH

2 6 µs

Presence Detect Low t

PDL

8 24 µs

NOTES:

1. All voltages are referenced to ground.

2. V

PUP

= external pullup voltage.

3. Input load is to ground.

4. An additional reset or communication sequence cannot begin until the reset high time has expired.

5. Read data setup time refers to the time the host must pull the 1-Wire bus low to read a bit. Data is

guaranteed to be valid within 1 µs of this falling edge.

6. Capacitance on the data contact could be 800 pF when power is first applied. If a 5 kΩ resistor is used

to pullup the data line to V

, 5 ms after power has been applied, the parasite capacitance will not

affect normal communications.

7. The reset low time (t

RSTL

) should be restricted to a maximum of 960 µs, to allow interrupt signaling,

otherwise, it could mask or conceal interrupt pulses.

8. V

is a function of the external pullup resistor and the V

power supply.

1 2 ... 13 14 15 16 17 18

Comentários a estes Manuais

Sem comentários

Rainbow-electronics DS1996 Manual do Utilizador Página 18

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics DS1996