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參數資料
| 型號： | AD9929 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CCD Signal Processor with Precision Timing Generator |
| 中文描述： | CCD信號處理器精確時序發生器 |
| 文件頁數： | 50/64頁 |
| 文件大小： | 558K |
| 代理商： | AD9929 |
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AD9929
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.
Rev. A | Page 50 of 64
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
Register Name
Register Type
Description
Selects MSHUT Pattern.
(0 = MSHUTPAT0, 1 = MSHUTPAT1, 2 = MSHUTPAT2, 3 = MSHUTPAT3)
MSHUT Initialize
(1 = MSHUT Output Held Low, 0 = Normal Operation Resumes)
MSHUT Control (0 = MSHUT Held at Last State,
1 = MSHUT Output Enabled for Normal Operation)
MSHUT Position during Normal Operation
MSHUT Position during High Precision Operation
MSHUT Pattern Length.
STROBE Output Enable Control
(0 = STROBE Output Held Low, 1 = Enable STROBE Output)
MSHUTPAT
2
Control (Address 0x01)
MSHUTINIT
1
Control (Address 0x0C)
MSHUTEN
1
Control (Address 0x0C)
MSHUTPOS
MSHUTPOS_HP
MSHUTLEN
11
3
8
Control (Address 0x0C)
Control (Address 0x0C)
Sys_Reg(13)
Control (Address 0x0B)
STROBE_EN
1
HD
MSHUTPAT0
MSHUTPAT1
MSHUTPAT2
MSHUTPAT3
MSHUTLEN + 1
0
Figure 57. MSHUT Patterns Available by Setting MSHUTPAT Register
VD
XSUBCK
t
EXP
XVSG1-
XVSG2
HD
MSHUTPOS = 3
MSHUTPAT = 0, MSHUTLEN = 5
MSHUT
1
2
3
1
2
3
4
5
0
Figure 58. Example of MSHUT Timing with MSHUTEN = 1 and MSHUTPOS_HP = 0
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