CS7620 データシートの表示（PDF） - Cirrus Logic
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CS7620 Datasheet PDF : 70 Pages
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CS7620
4.16 Timing Control - Number of Columns (LSBs)
Default = 93h; Read/Write (address 1Ah)
Bit Number
Bit Name
Default
7
6
5
4
3
2
1
0
num_pixels7 num_pixels6 num_pixels5 num_pixels4 num_pixels3 num_pixels2 num_pixels1 num_pixels0
1
0
0
1
0
0
1
1
Bit
Mnemonic
Function
7
num_pixels7
Column Numbers: Bits 7 through 0 of the number of columns.
6
num_pixels6
The number of columns registers should be written with the total number of
5
num_pixels5
pixels per line (columns) of the CCD including any black pixels and any extra
4
num_pixels4
pixels. (due to CCD horizontal register latency)
3
num_pixels3
The default value (num_pixels[12:0]) is 1683 which is the number of rows in a
2
num_pixels2
IBM35CCD2PIX1 CCD. (See Figure 28)
1
num_pixels1
0
num_pixels0
4.17 Timing Control - Number of Dark Rows
Default = A4h; Read/Write (address 1Bh)
Bit Number
Bit Name
Default
7
6
5
4
3
2
1
0
drk_rws_frst3 drk_rws_frst2 drk_rws_frst1 drk_rws_frst0 drk_rws_lst3 drk_rws_lst2 drk_rws_lst1 drk_rws_lst0
1
0
1
0
0
1
0
0
Bit
Mnemonic
Function
Dark Rows: The dark rows registers should be written with the number of
7
drk_rws_frst3
rows at the top and bottom of the CCD.
6
drk_rws_frst2
Please note that drk_rws_frst refers to the first rows to be read out. These are
the rows at the top of the image, which get inverted through the lens, and get
focused onto the bottom rows of the CCD.
5
drk_rws_frst1
The CS7620 uses these rows to acquire the proper black level.
4
drk_rws_frst0
The default value is 10 and the correct value to work with the
IBM35CCD2PIX1 CCD. (See Figure 28)
Dark Rows: The dark rows registers should be written with the number of
3
drk_rws_lst3
rows at the top and bottom of the CCD.
2
drk_rws_lst2
Note that drk_rws_lst refers to the last rows to be read out. This are the rows
at the bottom of the image, which get inverted through the lens, and get fo-
cused onto the top rows of the CCD.
1
drk_rws_lst1
The CS7620 uses these rows to acquire the proper black level.
0
drk_rws_lst0
The default value is 4 and is the correct value to work with the
IBM35CCD2PIX1 CCD. (See Figure 28)
DS301PP2
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