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參數(shù)資料
| 型號(hào)： | VV6501 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DUAL-MODE DIGITAL CAMERA CO-PROCESSOR |
| 中文描述： | 雙模式數(shù)字相機(jī)協(xié)處理器 |
| 文件頁數(shù)： | 34/44頁 |
| 文件大?。?/td> | 351K |
| 代理商： | VV6501 |
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Detailed Chipset Specifications
STV0681
34/44
ADCS 7283313C
7.8
Typical current consumption of complete camera
The following data assumes that the camera has been built according to reference design referred
to in
Chapter 10
. Figures are approximate and depend on actual components sources - see notes.
The sensor operates at @ 3.3V DC
Note: 1 See
Table 9
from
Section 7.3
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.
3 Option included in reference design to save current consumption, which can increase battery life
and increase chances of meeting USB suspend mode compliance requirements.
Table 14: Current consumption, complete STV0681+VV6411/6501 camera
Mode
Typical
Comments
’Snapshot’/Continuous/
Self timer mode
(while un-tethered)
60mA
Assuming appropriate hardware included, power is sourced
from PC while USB connected.
’Snapshot’/Continuous/
Self timer mode
(while tethered to PC)
60mA
While playing back audio
sounds through speaker
90mA
Assuming 8
speaker as explained in application note
AN1310
Standby mode
(when NOT connected to
USB)
Approx. 270μA + SDRAM
self-refresh current
(see
Note 2
) + sensor
suspend mode current
Total current in this mode equals:
STV0681 standby current consumption (see
Note 1
)
+ SDRAM self-refresh current (see
Note 2
)
+ peripheral circuitry (approx. 50
μ
A).
+ Sensor suspend mode current
PC Suspend mode
(when connected to USB):
Sensor SUSPEND pin
asserted
Approx. 300μA + SDRAM
self-refresh current
(see
Note 2
) + sensor
suspend mode current
Total current in this mode equals:
STV0681 Standby current consumption (see
Note 1
)
+SDRAM self-refresh current (see
Note 2
)
+ peripheral circuitry (approx. 50
μ
A)
+ 200
μ
A, based on 1.5k pull-up in camera and 15k pull-
down in PC.
+ Sensor suspend mode current
Standby mode
(when not connected to
USB): sensor powered off
using FET (see
Note 3
)
Approx. 270μA + SDRAM
self-refresh current
(see
Note 2
)
Total current in this mode equals:
STV0681 Standby current consumption (see
Note 1
)
+SDRAM self-refresh current (see
Note 2
)
+ peripheral circuitry (approx. 50
μ
A).
PC Suspend mode
(when connected to USB):
sensor powered off using
FET (see
Note 3
)
Approx. 100μA + SDRAM
self-refresh current
(see
Note 2
)
Total current in this mode equals:
STV0681 Standby current consumption (see
Note 1
)
+SDRAM self-refresh current (see
Note 2
)
+ peripheral circuitry (approx. 50
μ
A).
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