AD9929BBCZ datasheet(50/64 Pages) AD

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AD9929

Rev. A | Page 50 of 64

MSHUT TIMING

MSHUT Basic Operation

The AD9929 provides an MSHUT output pulse that can be con-

figured to control the mechanical shutter of the camera. The

registers used to control the MSHUT pulse are listed in

Table 37.

The MSHUT pulse can be placed at the start of any line by

using the 11-bit MSHUTPOS register. The MSHUT pulse width

is controlled by using the MSHUTLEN register. The AD9929

offers four preprogrammed MSHUT patterns that are selectable

using the MSHUTPAT register.

The preprogrammed length is the same for all patterns set by

the MSHUTLEN register, but the active on period of the

MSHUT pulse is different for each pattern, as shown in

Figure 57. Figure 58 shows an example of selecting

MSHUTPAT0 positioned to start 3 lines after the falling edge of

VD, with MSHUTLEN = 5.

Table 37. MSHUT and STROBE Registers

Bit

Width

Description

MSHUTPAT

Control (Address 0x01)

Selects MSHUT Pattern.

(0 = MSHUTPAT0, 1 = MSHUTPAT1, 2 = MSHUTPAT2, 3 = MSHUTPAT3)

MSHUTINIT

Control (Address 0x0C)

MSHUT Initialize

(1 = MSHUT Output Held Low, 0 = Normal Operation Resumes)

MSHUTEN

Control (Address 0x0C)

MSHUT Control (0 = MSHUT Held at Last State,

1 = MSHUT Output Enabled for Normal Operation)

MSHUTPOS

Control (Address 0x0C)

MSHUT Position during Normal Operation

MSHUTPOS_HP

Control (Address 0x0C)

MSHUT Position during High Precision Operation

MSHUTLEN

Sys_Reg(13)

MSHUT Pattern Length.

STROBE_EN

Control (Address 0x0B)

STROBE Output Enable Control

(0 = STROBE Output Held Low, 1 = Enable STROBE Output)

MSHUTPAT0

MSHUTPAT1

MSHUTPAT2

MSHUTPAT3

MSHUTLEN + 1

Figure 57. MSHUT Patterns Available by Setting MSHUTPAT Register

XSUBCK

tEXP

XVSG1-

XVSG2

MSHUTPOS = 3

MSHUTPAT = 0, MSHUTLEN = 5

MSHUT

Figure 58. Example of MSHUT Timing with MSHUTEN = 1 and MSHUTPOS_HP = 0

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