Rainbow-electronics DS1621 Manual do Utilizador descarregar pdf (Página 12)

DS1621

12 of 16 102299

MEMORY FUNCTION EXAMPLE

Example: Bus master sets up DS1621 for continuous conversion and thermostatic function.

BUS MASTER

MODE

DS1621

MODE

DATA (MSB

FIRST) COMMENTS

TX RX START Bus Master initiates a START condition.

TX RX <address,0>

Bus Master sends DS1621 address; R/

W

= 0.

RX TX ACK DS1621 generates acknowledge bit.

TX RX ACh Bus Master sends Access Config command protocol.

RX TX ACK DS1621 generates acknowledge bit.

TX RX 02h Bus Master sets up DS1621 for output polarity active

high, continuous conversion.

RX TX ACK DS1621 generates acknowledge bit.

TX RX START Bus Master generates a repeated START condition.

TX RX <address,0>

Bus Master sends DS1621 address; R/

W

= 0.

RX TX ACK DS1621 generates acknowledge bit.

TX RX A1h Bus Master sends Access TH command.

RX TX ACK DS1621 generates acknowledge bit.

TX RX 28h Bus Master sends first byte of data for TH limit of

+40°C.

RX TX ACK DS1621 generates acknowledge bit.

TX RX 00h Bus Master sends second byte of data for TH limit of

+40°C.

RX TX ACK DS1621 generates acknowledge bit.

TX RX START Bus Master generates a repeated START condition.

TX RX <address,0>

Bus Master sends DS1621 address; R/

W

= 0.

RX TX ACK DS1621 generates acknowledge bit.

TX RX A2h Bus Master sends Access TL command.

RX TX ACK DS1621 generates acknowledge bit.

TX RX 0Ah Bus Master sends first byte of data for TL limit of

+10°C.

RX TX ACK DS1621 generates acknowledge bit.

TX RX 00h Bus Master sends second byte of data for TL limit of

+10°C.

RX TX ACK DS1621 generates acknowledge bit.

TX RX START Bus Master generates a repeated START condition.

TX RX <address,0>

Bus Master sends DS1621 address; R/

W

= 0.

RX TX ACK DS1621 generates acknowledge bit.

TX RX EEh Bus Master sends Start Convert T command protocol.

RX TX ACK DS1621 generates acknowledge bit.

TX RX STOP Bus Master initiates STOP condition.

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