AD9927BBCZ datasheet(52/100 Pages) AD

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AD9927

Rev. 0 | Page 52 of 100

MODE FIELD NUMBER

4 (DRAFT)

0 (STILL 1ST FIELD)

EXAMPLE MODE REGISTER CHANGE:

CHANGE FROM DRAFT MODE (FIELD4) TO STILL MODE (FIELD0/1/2/3).

ALSO WRITE TO VGA GAIN OR ANY NEW REGISTER VALUES NEEDED

FOR STILL FRAME OPERATION, SUCH AS NEW FIELD INFORMATION.

1 (STILL 2ND FIELD)

MODE UPDATE

MODE WRITE

Figure 65. Update of MODE Register, SCK Updated (Default Setting)

MODE FIELD NUMBER

4 (DRAFT)

0 (STILL 1ST FIELD)

EXAMPLE MODE REGISTER CHANGE:

CHANGE FROM DRAFT MODE (FIELD4) TO STILL MODE (FIELD0/1/2/3).

FOR STILL FRAME OPERATION, SUCH AS NEW FIELD INFORMATION.

NOTES

1. NEW MODE INFORMATION IS UPDATED AT SECOND VD FALLING EDGE AFTER

SERIAL WRITE A.

1 (STILL 2ND FIELD)

MODE UPDATE

MODE WRITE

Figure 66. Update of MODE Register if Changed to VD-Updated Register

FIELD3

FIELD0

FIELD1

FIELD2

FIELD5

FIELD1

FIELD4

FIELD2

EXAMPLE 1:

TOTAL FIELDS = 3, FIRST FIELD = FIELD0, SECOND FIELD = FIELD1, THIRD FIELD = FIELD2

MODE SETTINGS:

0x2A = 0x3

0x2B = 0x820

0x2C = 0x0

EXAMPLE 2:

TOTAL FIELDS = 1, FIRST FIELD = FIELD3

MODE SETTINGS:

0x2A = 0x1

0x2B = 0x3

0x2C = 0x0

EXAMPLE 3:

TOTAL FIELDS = 4, FIRST FIELD = FIELD5, SECOND FIELD = FIELD1, THIRD FIELD = FIELD4, FOURTH FIELD = FIELD2

MODE SETTINGS:

0x2A = 0x4

0x2B = 0x11025

0x2C = 0x0

Figure 67. Using the MODE Registers to Select Field Timing

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