Rainbow-electronics DS28EA00 Manual de usuario descargar pdf (Pagina 14)

DS28EA00 1-Wire Digital Thermometer with Sequence Detect and PIO

14 of 29

Figure 10-2. Control Function Flow Chart (continued)

From Figure 10

3

rd

Part

To Figure 10

3

rd

Part

To Figure 10

1

st

Part

From Figure 10

1

st

Part

Y

N

48h

Copy Scratch-

pad?

Y

N

V

DD

Powered?

DS28EA00 starts

copy to EEPROM

N

Y

Copy

Completed?

Master RX “0s“

Master activates

strong pull-up

for t

PROG

DS28EA00 copies

scratchpad data

to EEPROM

Master deactivates

strong pull-up

N

Y

Master

TX Reset?

Master RX “1s“

Y

N

44h

Convert Tempera-

ture

Y

N

V

DD

Powered?

DS28EA00 starts

Temperature

Conversion

N

Y

Conversion

Completed?

Master RX “0s“

Master activates

strong pull-up

for t

CONV

DS28EA00

converts

Temperature

Master deactivates

strong pull-up

N

Y

Master

TX Reset?

Master RX “1s“

Master decision

.

The master needs to

know whether V

DD

power is available.

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