Maxim MX7705 Manual de usuario descargar pdf (Pagina 27)

MX7705

16-Bit, Low-Power, 2-Channel,

Sigma-Delta ADC

______________________________________________________________________________________ 27

POLL DRDY

OUTPUT

POWER-ON RESET

INITIALIZE

P SERIAL

PORT

WRITE TO THE SETUP REGISTER. SET

SELF-CALIBRATION MODE, GAIN TO 0,

UNIPOLAR MODE, UNBUFFERED MODE.

BEGIN SELF-CALIBRATION/CONVERSION

BY CLEARING FSYNC.

(0x44)

WRITE TO THE COMMUNICATIONS

NEXT OPERATION AS A WRITE TO THE

SETUP REGISTER.

(0x10)

WRITE TO THE CLOCK REGISTER. ENABLE

EXTERNAL OSCILLATOR. SELECT

OUTPUT UPDATE RATE OF 60Hz.

(0xA5)

WRITE TO THE COMMUNICATIONS

NEXT OPERATION AS A WRITE TO THE

CLOCK REGISTER.

(0x20)

WRITE TO THE COMMUNICATIONS

READ FROM THE DATA REGISTER.

(0x38)

READ THE DATA REGISTER

(16 BITS)

WRITE TO COMMUNICATIONS REGISTER.

SET NEXT OPERATION AS A READ FROM

THE COMMUNICATIONS REGISTER.

(0x08)

READ THE COMMUNICATIONS REGISTER

(8 BITS)

HARDWARE POLLING SOFTWARE POLLING

0 (DATA

READY)

0 (DATA

READY)

1 (DATA

NOT

READY)

1 (DATA NOT

READY)

POLL DRDY

BIT

Figure 11. Sample Flow Diagram for Data Conversion

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 33

Sigma-Delta ADC 1

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Maxim MX7705 Manual de usuario Pagina 27

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