CXD2498 Ver la hoja de datos (PDF) - Sony Semiconductor
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CXD2498 Datasheet PDF : 51 Pages
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CXD2498R
Control data: [Drive mode]
The CXD2498R realizes various drive modes by using control data D10 to D11 MODE and D16 to D17
PTMD. The drive mode bits are loaded to the CXD2498R and reflected at the falling edge of VD. These details
are described below.
First, the basic drive mode is assigned using the control data D10 to D11 MODE.
D11 D10
Description of operation
0
0 Draft mode (default)
0
1 Progressive scan mode
1
0 Double speed mode
1
1 Frame mode
Draft mode is the pulse eliminator drive mode called octuple speed mode in the ICX282. This is a high frame
rate drive mode that can be used for purposes such as monitoring and auto focus (AF).
Progressive scan mode is the pulse eliminator drive mode called double speed mode (1) in the ICX282. Pulse
elimination is performed, but the frame data is obtained over one field period and corresponds to progressive
scan drive, so it is called progressive scan mode in this data sheet.
Double speed mode is the pulse eliminator drive mode called double speed mode (2) in the ICX282. Readout
is applied with two lines added to provide an image which appears like frame mode with an increased frame
rate. This drive mode is comprised of A and B Fields, so when it is established, repeated drive is performed in
the manner of A → B → A → and so on.
Frame mode is the ICX282 drive mode in which the data for all lines are read. This drive mode is also
comprised of A and B Fields, so when it is established, repeated drive is performed in the manner of A → B →
A → and so on like double speed mode.
[Special drive modes]
Of the above basic drive modes, when a drive mode other than double speed mode is specified, special drive
modes can be specified using the control data D16 to D17 PTMD.
D17 D16
Draft mode
0
X Draft mode
1
0 AF1 mode
1
1 AF2 mode
Description of operation
Progressive scan mode
Frame mode
Progressive scan mode Frame mode
Center scan 1 mode Center scan 1 mode
Center scan 2 mode Center scan 2 mode
See the Timing Charts for details of all drive modes. Note that center scan modes (3) and (4) in the ICX282
correspond to center scan 1 and 2 in frame mode, and center scan modes (1) and (2) in the ICX282
correspond to center scan 1 and 2 in progressive scan mode.
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