CS7620 datasheet(39/70 Pages) CIRRUS

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CS7620

DS301PP2

4.16

Timing Control - Number of Columns (LSBs)

Default = 93h; Read/Write (address 1Ah)

4.17

Timing Control - Number of Dark Rows

Default = A4h; Read/Write (address 1Bh)

Bit Number

765432

Bit Name

num_pixels7

num_pixels6

num_pixels5

num_pixels4

num_pixels3

num_pixels2

num_pixels1

num_pixels0

Default

0010011

Bit

Mnemonic

Function

num_pixels7

Column Numbers: Bits 7 through 0 of the number of columns.

The number of columns registers should be written with the total number of

pixels per line (columns) of the CCD including any black pixels and any extra

pixels. (due to CCD horizontal register latency)

The default value (num_pixels[12:0]) is 1683 which is the number of rows in a

IBM35CCD2PIX1 CCD. (See Figure 28)

num_pixels6

num_pixels5

num_pixels4

num_pixels3

num_pixels2

num_pixels1

num_pixels0

Bit Number

765432

Bit Name

drk_rws_frst3 drk_rws_frst2 drk_rws_frst1 drk_rws_frst0

drk_rws_lst3

drk_rws_lst2

drk_rws_lst1

drk_rws_lst0

Default

0100100

Bit

Mnemonic

Function

drk_rws_frst3

Dark Rows: The dark rows registers should be written with the number of

rows at the top and bottom of the CCD.

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.

The CS7620 uses these rows to acquire the proper black level.

The default value is 10 and the correct value to work with the

IBM35CCD2PIX1 CCD. (See Figure 28)

drk_rws_frst2

drk_rws_frst1

drk_rws_frst0

drk_rws_lst3

Dark Rows: The dark rows registers should be written with the number of

rows at the top and bottom of the CCD.

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.

The CS7620 uses these rows to acquire the proper black level.

The default value is 4 and is the correct value to work with the

IBM35CCD2PIX1 CCD. (See Figure 28)

drk_rws_lst2

drk_rws_lst1

drk_rws_lst0

CS7620 数据表(PDF) 39 Page - Cirrus Logic

CS7620 数据表(HTML) 39 Page - Cirrus Logic

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CS7620 数据表(PDF) 39 Page - Cirrus Logic

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