CS7620-IQ View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS7620-IQ Datasheet PDF : 70 Pages
| |||
CS7620
fs_lvl
00
01
1X
Full Scale Voltage
0.53 V
1.07 V
1.60 V
Table 9. Full Scale Level Choices
4.6 Black Level Control - Accumulator (LSB)
Default = 00h; Read/Write (address 0Dh)
Bit Number
Bit Name
Default
7
6
5
4
3
2
1
0
accumulator7 accumulator6 accumulator5 accumulator4 accumulator3 accumulator2 accumulator1 accumulator0
0
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7
accumulator7
Black Level Accumulator: See Description of register 0Eh.
6
accumulator6
5
accumulator5
4
accumulator4
3
accumulator3
2
accumulator2
1
accumulator1
0
accumulator0
4.7 Black Level Control - Accumulator (MSB)
Default = 01h; Read/Write (address 0Eh).
Bit Number
Bit Name
Default
Bit
7:1
0
7
-
Mnemonic
-
accumulator8
6
5
4
3
2
1
0
Reserved
accumulator8
-
-
-
-
-
-
1
Function
Reserved
Black Level Accumulator: The black level accumulator is a 9 bit number rep-
resenting an amount of offset added to the input of the CDS circuit. The black
level loop alters the black level accumulator value to make the output of the
ADC settle to code 64 during black pixels. If desired the black loop may be
disabled and written to manually to add any desired amount of offset. There
is a total of ~100 mV of offset range if the offset range register setting is set to
1 or ~50 mV when this register setting is set to “0”. This offset range is used
to correct for CCD offsets plus internal offsets generated in the analog path of
this chip. The offset range before subtracting the internal offsets is as shown
in Table 10 below with the worst case internal offsets being ±17 mV.
Offset Range (Reg
06h bit 0)
1
0
Max Offset Blk Acc=511 Min Offset Blk Acc=0
~30 mV
~11 mV
~-72 mV
~-40 mV
Table 10. Offset Range
Accumulator LSB Size
~0.2 mV
~0.1 mV
32
DS301PP2
Share Link: 