Omega Speaker Systems PCI-DAS1001 User Manual download pdf (Page 26)

7.3.4 CALIBRATION REGISTER

See "Calibrating The PCI-DAS1000" document for additional programming details.

BADR1 + 6

This register controls all autocal operations. This is a Write-only register.

WRITE

--------

SEL8800SEL7376-CSRC0CSRC1CSRC2CALENSDI

0123456789101112131415

SEL8800

This bit enables the 8-bit trim DACs for the following circuits:

ADC

Fine Offset

ADC

Coarse

Offset

DAC1

Coarse Gain

DAC1

Fine Gain

DAC1

Offset

DAC0

Offset

DAC0

Coarse Gain

DAC0

Fine Gain

Cal Function DAC Channel

SEL7376

This bit latches the 7-bit serial data stream into the AD7376 digital potentiometer

(10KOhm). The AD7376 is used for analog front-end gain calibration.

CSRC[2:0]

These bits select the different calibration sources available to the ADC front end.

VDAC1111

VDAC0011

8.6mV101

0.875V001

1.75V110

3.5V010

7.0V100

AGND000

Cal SourceCSRC0CSRC1CSRC2

CALEN

This bit is used to enable Cal Mode.

1 = Selected Cal Source,

CSRC[2:0]

, is fed into Analog Channel 0.

0 = Analog Channel 0 functions as normal input.

SDI

Serial Data In. This bit is used to set serial address/data stream for the

DAC8800 TrimDac and 7376 digital potentiometer. Used in conjunction

with

SEL8800

and

SEL7376

bits.

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 38 39

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Omega Speaker Systems PCI-DAS1001 User Manual Page 26

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