STV0680B-001 STMicroelectronics, STV0680B-001 Datasheet - Page 33

• Manufacturer Part Number: STV0680B-001
• Description: DUAL-MODE DIGITAL CAMERA CHIPSET
• Manufacturer: STMicroelectronics

STV0680B + VV6444/6410/6500
6.5
6.5.1
Note: 1 See
2 From limited evaluation, typical self-refresh current figures of certain SDRAM chips are well below
3 This is assuming a low quiescent current 3v3 VReg is used, and assuming that the sensor is
Typical current consumption of complete camera
The following data assumes that the camera has been built according to reference design referred
to in
Using VV6444 (sensor operates at @ 5V DC)
manufacturers’ maximum specification, e.g. 100-250 A . See
switched off using external circuitry.
’Snapshot’/Continuous/Self
timer mode (while un-teth-
ered)
’Snapshot’/Continuous/Self
timer mode (while tethered
to PC)
Camera stand-by mode
(when NOT connected to
USB)
Suspend mode
(when connected to USB)
Table 10
Chapter 6
Mode
fin
Figures are approximate and depend on actual components sources - see notes.
Table 17 : Current consumption, complete STV0680B+VV6444 camera
Section 6.2
80mA
80mA
Approx. 220µA + SDRAM
self-refresh current (see
Note 2
Note 2
Typical Current Cons.
Approx. 80µA + SDRAM
self-refresh current (see
)
)
Version 3.4
Assuming appropriate hardware included, power is sourced
from PC while USB connected.
Total current in this mode equals:
STV0680/680A Standby current consumption (see
+ SDRAM self-refresh current (see
+ peripheral circuitry (approx. 50 A, see
Total current in this mode equals:
STV0680/680A Standby current consumption (see
+ SDRAM self-refresh current (see
+ peripheral circuitry (approx. 50 A, see
+ 200 A, based on 1.5k pull-up in camera (see
and 15k pull-down in PC.
Section 4
Detailed chipset specifications
Comments
for recommendations.
Note 2
Note 2
Note 3
Note 3
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Section 4
Note 1
Note 1
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