ICX262 SONY [Sony Corporation], ICX262 Datasheet - Page 19

• Manufacturer Part Number: ICX262
• Description: Timing Generator for Frame Readout CCD Image Sensor
• Manufacturer: SONY [Sony Corporation]

Control data/shutter data: [Electronic shutter]
The CXD2497R realizes various electronic shutter functions by using control data D13 to D14 SMD and
shutter data D10 to D19 SVD, D20 to D31 SHD and D32 to D41 SPL.
These functions are described in detail below.
First, the various modes are shown below.
These modes are switched using control data D13 to D14 SMD.
The period during which SVD and SHD are specified together is the shutter speed. Concretely, when specifying
high-speed shutter, SVD is set to "000h". (See the figure.) During low-speed shutter, or in other words when
SVD is set to "001h" or higher, the serial interface data is not loaded until this period is finished.
The vertical period indicated here corresponds to one field in each drive mode. In addition, the number of
horizontal periods applied to SHD can be considered as (number of SUB pulses – 1). However, in the frame
mode A field, it matches (number of SUB pulses + 1). This is a specification for flickerless when the same mode
is repeated. But this change may not occur because of flickerless by the conditions during low-speed shutter.
Note) The bit data definition area is assured in terms of the CXD2497R functions, and does not assure the
The electronic shutter data is expressed as shown in the table below using D20 to D31 SHD as an example.
However, MSB (D31) is a reserve bit for the future specification, and it is handled as dummy on this IC.
[Electronic shutter stopped mode]
During this mode, all shutter data items are invalid.
SUB is not output in this mode, so the shutter speed is the accumulation time for one field.
[High-speed/low-speed shutter mode]
During this mode, the shutter data items have the following meanings.
MSB
Symbol
D31 D30
D14
SVD
SHD
SPL
X
0
0
1
1
CCD characteristics.
0
D13
D10 to D19
D20 to D31
D32 to D41
0
1
0
1
1
D29 D28
Data
0
Electronic shutter stopped mode
High-speed/low-speed shutter mode
HTSG control mode
1
Description of operation
D27 D26 D25 D24 D23 D22 D21 D20
Number of vertical periods specification (000h ≤ SVD ≤ 3FFh)
Number of horizontal periods specification (000h ≤ SHD ≤ 7FFh)
Vertical period specification for high-speed shutter operation (000h ≤ SPL ≤ 3FFh)
1
1
C
0
0
– 19 –
0
0
Description
3
1
LSB
1
SHD is expressed as 1C3h .
CXD2497R