AD7707 datasheet(39/53 Pages) AD

39 / 53 page

AD7707

Rev. B | Page 38 of 52

POWER-ON/RESET FOR AD7707

CONFIGURE AND INITIALIZE MICROCONVERTER/

MICROPROCESSOR SERIAL PORT

WRITE TO COMMUNICATIONS REGISTER SELECTING

CHANNEL AND SETTING UP NEXT OPERATION TO BE A

WRITE TO THE CLOCK REGISTER (20 HEX)

WRITE TO CLOCK REGISTER SETTING THE CLOCK

BITS IN ACCORDANCE WITH THE APPLIED MASTER

CLOCK SIGNAL AND SELECT UPDATE RATE FOR

SELECTED CHANNEL (0C HEX)

WRITE TO COMMUNICATIONS REGISTER SELECTING

CHANNEL AND SETTING UP NEXT OPERATION TO BE A

WRITE TO THE SETUP REGISTER (10 HEX)

WRITE TO SETUP REGISTER CLEARING F SYNC,

SETTING UP GAIN, OPERATING CONDITIONS AND

INITIATING A SELF-CALIBRATION ON SELECTED

CHANNEL (40 HEX)

POLL DRDY PIN

YES

WRITE TO COMMUNICATIONS REGISTER SETTING UP

NEXT OPERATION TO BE A READ FROM THE DATA

READ FROM DATA REGISTER

WRITE TO COMMUNICATIONS REGISTER SETTING UP NEXT

OPERATION TO BE A READ FROM THE COMMUNICATIONS

READ FROM COMMUNICATIONS REGISTER

POLL DRDY BIT OF COMMUNICATIONS REGISTER

WRITE TO COMMUNICATIONS REGISTER SETTING UP

NEXT OPERATION TO BE A READ FROM THE DATA

START

READ FROM DATA REGISTER

DRDY

LOW?

YES

DRDY

LOW?

Figure 22. Flowchart for Setting Up and Reading from the AD7707

AD7707 데이터시트(PDF) 39 Page - Analog Devices