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參數資料
| 型號： | VV6444C001 |
| 廠商： | 意法半導體 |
| 英文描述： | Low Cost Digital Camera (LCDC) Chipset |
| 中文描述： | 低成本數碼相機（LCDC）芯片組 |
| 文件頁數： | 32/60頁 |
| 文件大?。?/td> | 352K |
| 代理商： | VV6444C001 |
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PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
STV0680A + VV6444/6410/6500
CDSTV0680F-C
Commercial in confidence
32
T
STV0680F_contents.fm
7.5.1
Using VV6444 (sensor operates at @ 5V DC)
Notes:
1. See Table 11 on page 26.
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 9. for recommendations.
3. This is assuming a low quiescent current 3v3 VReg is used, and assuming that the sensor is switched off using external cir-
cuitry.
Mode
Typical Current
Cons.
Comments
’Snapshot’/Continuous/
Self timer mode (while
un-tethered)
80mA
’Snapshot’/Continuous/
Self timer mode (while
tethered to PC)
80mA
Assuming appropriate hardware included, power is
sourced from PC while USB connected.
Camera standby mode
(when NOT connected to
USB)
Approx. 0.4mA +
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. 0.6mA +
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
9.) and 15k pull-down in PC.
Table 21 : Current consumption, complete STV0680A+VV6444 camera
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