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WM8170 Datasheet(PDF) 34 Page - Wolfson Microelectronics plc

Part # WM8170
Description  3.3V Integrated Signal Processor for Area Array CCDs
PDF  41 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8170 Datasheet(HTML) 34 Page - Wolfson Microelectronics plc

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WM8170
Product Preview Rev 1.0
WOLFSON MICROELECTRONICS LTD
PP Rev 1.0 March 2000
34
CONTROL BITS
DESCRIPTION
BLACK LEVEL TARGET (000100)
TARGET[7:0]
Target value for the black level.
PGA GAIN (000101)
GAIN[7:0]
Controls the PGA gain.
00hex is minimum gain
FFhex is maximum gain
DIGITAL DURATION (000110)
DIGDUR[3:0]
Digital correction duration: number of ADC conversion that are used to calculate the average.
DIGDUR3
DIGDUR2
DIGDUR1
DIGDUR0
Durations
0
0
0
0
1 ADC conversion
0
0
0
1
2 ADC conversions
0
0
1
0
4 ADC conversions
0
0
1
1
8 ADC conversions
0
1
0
0
16 ADC conversions
0
1
0
1
32 ADC conversions
0
1
1
0
64 ADC conversions
0
1
1
1
128 ADC conversions
1
0
0
0
256 ADC conversions
1
0
0
1
512 ADC conversions
1
0
1
0
1024 ADC conversions
1
0
1
1
2048 ADC conversions
1
1
0
0
2048 ADC conversions
1
1
0
1
2048 ADC conversions
1
1
1
0
2048 ADC conversions
1
1
1
1
2048 ADC conversions
ANALOGUE DURATION (000111)
ANDUR[6:0]
Controls the duration of the analogue loop enable - i.e. it represents the number of times that the up-down
counter will be clocked per falling edge of the BLCENB input.
THRESHOLD DETECT LSB / MSB (001001/10)
THRES[9:0]
Threshold detect value. If the corrected ADC output data is greater than the THRES[9:0] then PTDO will be
high. (Note PTDO[1:0] must be 00bin). Note THRES[9:0] is split into two registers, THRES[9:8] and
THRES[7:0].
POWER DOWN 1 (001011)
PDA
Global power down, OR'd with PDB pin
POWER DOWN 2 (001100)
PD[7:0]
Controls the analogue power downs. Note this is split over 2 registers (0 - block enabled, 1 - block powered
down).
PD0
S/H, PGA and the analogue correction loop power down
PD1
VMID and VCLP power down.
PD2
VRT and VRB power down.
PD3
ADC only power down.
PD4
AUX2DAC power down
PD5
AUX1DAC power down
AUXILIARY DAC 1
(001101)
AUX1DAC[7:0]
Auxiliary 1 DAC value
AUXILIARY DAC 2 (001110)
AUX2DAC[7:0]
Auxiliary 2 DAC value.



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