AD9927 Analog Devices, AD9927 Datasheet - Page 52

• Manufacturer Part Number: AD9927
• Description: 14-Bit CCD Signal Processor
• Manufacturer: Analog Devices

AD9927
MODE FIELD NUMBER
MODE FIELD NUMBER
EXAMPLE 1:
TOTAL FIELDS = 3, FIRST FIELD = FIELD0, SECOND FIELD = FIELD1, THIRD FIELD = FIELD2
MODE SETTINGS:
0x2A = 0x3
0x2B = 0x820
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
EXAMPLE 2:
TOTAL FIELDS = 1, FIRST FIELD = FIELD3
MODE SETTINGS:
0x2A = 0x1
0x2B = 0x3
0x2C = 0x0
FIELD0
FIELD3
FIELD5
REGISTER WRITE
REGISTER WRITE
Figure 66. Update of MODE Register if Changed to VD-Updated Register
VD
VD
Figure 65. Update of MODE Register, SCK Updated (Default Setting)
FIELD1
FIELD1
EXAMPLE MODE REGISTER CHANGE:
REGISTER WRITE A –– WRITE TO MODE REGISTERS 0x2A, 0x2B, 0x2C TO SPECIFY
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.
EXAMPLE MODE REGISTER CHANGE:
REGISTER WRITE A––WRITE TO MODE REGISTERS 0x2A, 0x2B, 0x2C TO SPECIFY
CHANGE FROM DRAFT MODE (FIELD4) TO STILL MODE (FIELD0/1/2/3).
REGISTER WRITE B––WRITE TO VGA GAIN OR ANY NEW REGISTER VALUES NEEDED
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.
Figure 67. Using the MODE Registers to Select Field Timing
4 (DRAFT)
4 (DRAFT)
MODE WRITE
A
FIELD2
FIELD4
MODE WRITE
4 (DRAFT)
4 (DRAFT)
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A
B
FIELD2
MODE UPDATE
MODE UPDATE
0 (STILL 1ST FIELD)
0 (STILL 1ST FIELD)
1 (STILL 2ND FIELD)
1 (STILL 2ND FIELD)
2
2