AD9923ABBCZ datasheet(53/88 Pages) AD

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AD9923A

Rev. 0 | Page 53 of 88

Length

(Bits)

Range

Description

SHUTPOL

High/low

SHUT active polarity.

SHUT_MAN

Enable/disable

Enables SHUT manual control mode.

0 = disable.

1 = enable.

SHUT_ON_FD

0 to 4095 field location

Field location to switch on MSHUT. Inactive, or closed.

SHUT_ON_LN

0 to 4095 line location

Line position to switch on MSHUT. Inactive, or closed.

SHUT_ON_PX

0 to 8191 pixel location

Pixel position to switch on MSHUT. Inactive, or closed.

SHUT_OFF_FD

0 to 4095 field location

Field location to switch off MSHUT. Inactive, or closed.

SHUT_OFF_LN

0 to 4095 line location

Line position to switch off MSHUT. Inactive, or closed.

SHUT_OFF_PX

0 to 8191 pixel location

Pixel position to switch off MSHUT. Inactive, or closed.

Explanation of Figure 71

The numbers in this section, Explanation of Figure 71,

correspond precisely to the numbers embedded in Figure 71.

Write to the READOUTNUM register (Address 0x62) to

specify the number of fields to suppress SUBCK during

readout of CCD data. In this example, READOUTNUM = 3.

Write to the EXPOSURENUM register (Address 0x63) to

specify the number of fields to suppress SUBCK and VSG out-

puts during exposure. In this example, EXPOSURENUM = 1.

Write to the TRIGGER register (Address 0x61) to trigger

the SHUT0 (STROBE), SHUT1 (MSHUT), and VSUB0

(VSUB) signals, and to start the exposure-plus-readout

operation. To trigger these events (see Figure 71), set the

after the exposure period finishes.

Write to the MODE register to configure the next five

fields. The first two fields during exposure are the same as

the current draft mode fields, and the next three fields are

the still frame readout fields. The register settings for the

draft mode field and the three readout fields are previously

programmed.

VD/HD falling edge updates the serial writes from 1.

If VSUB0 MODE = 0 (Address 0x69), VSUB output

turns on at the line specified in the VSUB0_ON

STROBE output turns on and off at the location specified

in the SHUT0_ON/SHUT0_OFF registers (Address 0x6D/

Address 0x71).

MSHUT output turns off at the location specified in the

SHUT1_OFF_FD, SHUT1_OFF_LN, and SHUT1_OFF_PX

registers (Address 0x75 and Address 0x76). The SHUT1 on

position is ignored, because the SHUT1 signal is already on

from a previous manual operation (see Step 10).

The next VD falling edge automatically starts the first

readout field.

The next VD falling edge automatically starts the second

readout field.

The next VD falling edge automatically starts the third

readout field.

Write to the MODE register to reconfigure the single draft

mode field timing.

Write a 1 to the SHUT1_MAN and SHUT1_ON registers

(Address 0x72) to turn the MSHUT output back manually.

10. VD/HD falling edge updates the serial writes from 9. VSG

outputs return to draft mode timing. SUBCK output

resumes operation.

MSHUT output returns to the on position (active or open).

Be sure to disable manual control of SHUT1 before another

automatic trigger of the SHUT1 signal is needed.

VSUB output returns to the off position (inactive).

AD9923ABBCZ Datasheet(PDF) 53 Page - Analog Devices

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