參數資料
型號： VV6410C036
廠商： 意法半導體
英文描述： DUAL-MODE DIGITAL CAMERA CHIPSET
中文描述： 雙模式數字相機芯片組
文件頁數： 33/63頁
文件大?。?/td> 563K
代理商： VV6410C036
Version 3.4
33/63
STV0680B + VV6444/6410/6500
Detailed chipset specifications
6.5
Typical current consumption of complete camera
The following data assumes that the camera has been built according to reference design referred
to in
Chapter 6
Figures are approximate and depend on actual components sources - see notes.
6.5.1
Using VV6444 (sensor operates at @ 5V DC)
Note: 1 See
Table 10
fin
Section 6.2
2 From limited evaluation, typical self-refresh current figures of certain SDRAM chips are well below
manufacturers’ maximum specification,
e.g. 100-250
μ
A
. See
Section 4
for recommendations.
3 This is assuming a low quiescent current 3v3 VReg is used, and assuming that the sensor is
switched off using external circuitry.
Mode
Typical Current Cons.
Comments
’Snapshot’/Continuous/Self
timer mode (while un-teth-
ered)
80mA
’Snapshot’/Continuous/Self
timer mode (while tethered
to PC)
80mA
Assuming appropriate hardware included, power is sourced
from PC while USB connected.
Camera stand-by mode
(when NOT connected to
USB)
Approx. 220μA + SDRAM
self-refresh current (see
Note 2
)
Total current in this mode equals:
STV0680/680A Standby current consumption (see
Note 1
)
+ SDRAM self-refresh current (see
Note 2
)
+ peripheral circuitry (approx. 50
μ
A, see
Note 3
).
Suspend mode
(when connected to USB)
Approx. 80μA + SDRAM
self-refresh current (see
Note 2
)
Total current in this mode equals:
STV0680/680A Standby current consumption (see
Note 1
)
+ SDRAM self-refresh current (see
Note 2
)
+ peripheral circuitry (approx. 50
μ
A, see
Note 3
).
+ 200
μ
A, based on 1.5k pull-up in camera (see
Section 4
)
and 15k pull-down in PC.
Table 17 : Current consumption, complete STV0680B+VV6444 camera
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