CSG14K_CSG8K datasheet(102/113 Pages) AMSCO

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CSG14K_CSG8K

Functional Description

Datasheet

• PUBLIC

DS000571

• v1-00 • 2020-Dec-15

112

│ 101

Using the DOUT_OB_* channels is optional. Using the channels requires routing additional output

channels to the receiving system.

Enabling the DOUT_OB_* channels has no impact on the regular DOUT* channels transporting the

visible pixel data.

7.8.8

Test Images

The data stream can be replaced with a number of test patterns. Selection of test mode is made with

the TEST_LVDS register as indicated in the table below.

Figure 128:

Test Images Registers

Reg. Name

Bank

Addr

Bits

Description

TEST_LVDS

[1:0]

See table below

TRAINING_WORD

73-74

[12:0]

Choose a value

TX_TEST_EN

74-75

[9:7]

See table below. Applies to

DATAx_OUT, OB_OUT and CTR_OUT

CLK_OUT.TX_TEST_EN

78-79

[9:7]

See table below. Applies only to

CLK_OUT

Figure 129:

Test Modes

TX_TEST_EN

TEST_LVDS

DATAx_OUT

OB_OUT

CTR_OUT

CLK_OUT

Normal

Force training word

continuously

Force training word

continuously

Force training word

continuously

Normal

Test image:

gradient

Drive constant 0

Normal

Test image: LFSR

Drive constant 0

Normal

Force clock output

Normal

PRBS-7

PRBS-15

Mode 0 is the functional mode. Modes 1 to 3 are test modes that replace the image data with known

data. In test mode 1, the data and OB output channels are forced to output register

TRAINING_WORD and the control channel outputs its own training word.

In test modes 2 and 3, a fixed test image is created. The CLK_OUT and CTR_OUT channels drive

their normal values, so only the actual pixel data is replaced. This is useful to debug the camera

system before grabbing real images.

In test mode 2, the data of pixel N is replaced by the value:

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