4 calibration register, Badr1 + 6, Sel8800 – Omega Speaker Systems PCI-DAS1001 User Manual
Page 26: Sel7376, Csrc[2:0, Calen
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
-
-
-
-
-
-
-
-
SEL8800
SEL7376
-
CSRC0
CSRC1
CSRC2
CALEN
SDI
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SEL8800
This bit enables the 8-bit trim DACs for the following circuits:
ADC Fine Offset
7
ADC Coarse Offset
6
DAC1 Coarse Gain
5
DAC1 Fine Gain
4
DAC1 Offset
3
DAC0 Offset
2
DAC0 Coarse Gain
1
DAC0 Fine Gain
0
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.
VDAC1
1
1
1
VDAC0
0
1
1
8.6mV
1
0
1
0.875V
0
0
1
1.75V
1
1
0
3.5V
0
1
0
7.0V
1
0
0
AGND
0
0
0
Cal Source
CSRC0
CSRC1
CSRC2
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.
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