CS7620 datasheet(47/70 Pages) CIRRUS

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CS7620

DS301PP2

4.28

Timing Control - Lines of Exposure in Low Resolution Mode (MSBs)

Default = 06h; Read/Write (address 26h)

4.29

Timing Control - Polarity of Vertical Shift Outputs

Default = FFh; Read/Write (address 28h)

Bit Number

765432

Bit Name

n_int7

n_int6

n_int5

n_int4

n_int3

n_int2

n_int1

n_int0

Default

0000110

Bit

Mnemonic

Function

7n_int7

Exposure Time in Low Resolution Mode: In low resolution mode, the

CS7620 continuously outputs data on a frame by frame basis; so it can drive

a LCD panel in a video mode. In this mode the CS7620 ignores the expose

signal.

N_int allows to shorten the exposure time while in low resolution mode.

N_int controls the amount of time (measured in readout lines) where the CCD

will be exposed to light. The default is 262, this means that the CCD receives

full exposure during readout. By decreasing n_int, the amount of exposure can

be decreased. To further increase this exposure time beyond the full 262 lines

of readout time, the n_extra register (23h and 24h) is provided.

6n_int6

5n_int5

4n_int4

3n_int3

2n_int2

1n_int1

0n_int0

Bit Number

765432

Bit Name

v_polarity7

v_polarity6

v_polarity5

v_polarity4

v_polarity3

v_polarity2

v_polarity1

v_polarity0

Default

1111111

Bit

Mnemonic

Function

v_polarity7

Vertical Signal Polarity: Polarity of each of the eight vertical shift outputs

(V1 V2 V3 V4 S1 S2 S3 S4), where V1 polarity = MSB, S4 polarity = LSB

A “0” indicates that the signal state is low, a “1” indicates that the signal state

is high.

v_polarity6

v_polarity5

v_polarity4

v_polarity3

v_polarity2

v_polarity1

v_polarity0

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