CXD2450R データシートの表示（PDF） - Sony Semiconductor
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CXD2450R Datasheet PDF : 30 Pages
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CXD2450R
[High-speed/low-speed shutter mode]
During this mode, the data has the following meanings.
Symbol
Shut.FRM
Shut.HD
Data
D18 to D25
D26 to D35
Description
Shutter speed data (number of vertical intervals) specification
Shutter speed data (number of horizontal intervals) specification
The CXD2450R does not distinguish between the high-speed shutter and low-speed shutter modes. The
interval during which Shut.FRM and Shut.HD are specified together is the shutter speed. At this time,
Shut.FRM controls the ternary level output at V2a and V2b, and Shut.HD controls the VSUB output.
Concretely, when specifying high-speed shutter, Shut.FRM is set to 00h. (See the figure.) During low-speed
shutter, or in other words when Shut.FRM is set to 01h or higher, the serial interface data is not loaded until
this interval is finished.
However, care should be taken as the vertical interval indicated here is set in 1/60s units when the drive mode
is monitoring drive mode and 1/30s units during recording mode. For monitoring drive mode, care should be
taken as the Shut.HD value has an offset. This is so that the CXD2450R can obtain basically the same
exposure time for the same Shut.HD value during high-speed shutter independent of the drive mode.
Formula for calculating the electronic shutter speed: [Shut.FRM/Shut.HD] (unit: µs)
Monitoring drive mode:
T = Shut.FRM∗1.66834∗104 + {(20Ch – Shut.HD)∗780 + 447} ∗81.5∗10–3 (000h ≤ Shut.HD ≤ 20Ch)
FRI
V2a
VSUB
Shut.HD-106h
Shut.FRM
SMD
Shut. FRM
Shut. HD
WEN
01
00h
1A6h
01
01h
1DDh
01
00h
1A6h
During monitoring drive mode/low-speed shutter mode
Recording drive mode:
T = Shut.FRM∗3.33667∗104 + {(20Ch – Shut.HD)∗780 + 447} ∗81.5∗10–3 (000h ≤ Shut.HD ≤ 20Ch)
FRI
V2a
VSUB
Shut.HD
Shut.FRM
SMD
Shut. FRM
Shut. HD
WEN
01
01h
1DDh
01
00h
1A6h
During recording drive mode/low-speed shutter mode
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