Agilent Technologies E1564A Calibration Flash ROM Data Register, Calibration Source Register

Models: E1563A E1564A

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Calibration Flash ROM Data Register

This register holds the data of the calibration flash ROM that is used for the calibration constants. The upper eight bits return “0” when this register is read. Note the bit pattern 01010 for bits 15-11 in the upper byte. A write to Flash ROM is aborted if this pattern is not present.

base + 1E16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Write*

0

1

0

1

0

1

0

1

D7

D6

D5

D4

D3

D2

D1

D0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Read**

0

0

0

0

0

0

0

0

D7

D6

D5

D4

D3

D2

D1

D0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Calibration Source Register

The E1564A 4-Channel Digitizer has an on-board calibration source. The source is a 12-bit DAC with a gain switch. Bit 15 is the gain switch and bits 11 through 0 are the calibration value.

base + 2016

15

 

14

13

12

11

10

9

8

7

6

 

5

4

3

2

 

1

0

Write

RANGE

 

 

MUX1

MUX0

 

 

 

 

 

DAC Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*WRITE BITS (Calibration Source Register)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

bits 0-11

 

DAC

 

DAC data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

bit 12, 13

 

MUX0, 1

connects choices to the output; 00 = CAL source, 01 = Raw DAC output,

 

 

 

 

 

 

 

10 = Internal +5V reference, 11 = Input short

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

bit 15

 

RANGE

DAC output ranges: 0 = ±15V DAC output, 1 = ±0.5V DAC output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cache Count Register

The total number of samples taken by the digitizer is the ((cache count x 2) divided by the number of channels) + the sample count (registers at offset 1816 and 1A16).

base + 2216

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Write

0

0

0

0

0

0

0

0

 

 

 

Cache count

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

132 Register-Based Programming

Appendix B

Page 132
Image 132
Agilent Technologies E1564A, E1563A Calibration Flash ROM Data Register, Calibration Source Register, Cache Count Register