VV6444 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

VV6444

DUAL-MODE DIGITAL CAMERA CHIPSET

STMicroelectronics 

Detailed chipset specifications

STV0680B + VV6444/6410/6500

6.5.2 Using VV6410/6411/6500 (sensor operates at @ 3.3V DC)

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 90mA

sounds through speaker

Assuming 8Ω speaker as explained in application note

AN1310

Standby Mode (when NOT

connected to USB):

Sensor SUSPEND pin

asserted (see Note 4)

Approx. 220µA + SDRAM

self-refresh current

(see Note 2) + sensor

suspend mode current

(see Note 3)

Total current in this mode equals:

STV0680B Standby current consumption (see Note 1)

+ SDRAM self-refresh current (see Note 2)

+ peripheral circuitry (approx. 50µA).

+ Sensor suspend mode current (See Note 3)

PC Suspend mode

(when connected to USB):

Sensor SUSPEND pin

asserted (see Note 4)

Approx. 50µA + SDRAM

self-refresh current

(see Note 2) + sensor

suspend mode current

(see Note 3)

Total current in this mode equals:

STV0680B Standby current consumption (see Note 1)

+SDRAM self-refresh current (see Note 2)

+ peripheral circuitry (approx. 50µA).

+ 200µA, based on 1.5k pull-up in camera (see Chapter 6)

and 15k pull-down in PC.

+ Sensor suspend mode current (See Note 3)

Standby Mode (when NOT

connected to USB): sensor

powered off using FET

(see Note 5)

Approx. 220µA + SDRAM

self-refresh current

(see Note 2)

Total current in this mode equals:

STV0680B Standby current consumption (see Note 1)

+ SDRAM self-refresh current (see Note 2)

+ peripheral circuitry (approx. 50µA).

PC Suspend mode (when

connected to USB): sensor

powered off using FET

(see Note 5)

Approx. 100µA + SDRAM

self-refresh current

(see Note 2)

Total current in this mode equals:

STV0680B Standby current consumption (see Note 1)

+SDRAM self-refresh current (see Note 2)

+ peripheral circuitry (approx. 50µA).

Table 18 : Current consumption, complete STV0680B+VV6410/6411/6500 camera

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. 100-250µA. See Section 4 for recommendations.

3 Sensor suspend mode current <100µA (needs SUSPEND pin asserted with VV6500), see Table 15

and Table 16.

4 If the appropriate hardware to assert the sensor SUSPEND pin is not fitted, an additional current

consumption in Standby/PC Suspend mode of Approx. 50µA can be expected with VV6500.

5 Option included in reference design to save current consumption, which can increase battery life

and increase chances of meeting USB suspend mode compliance requirements.

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Version 3.4

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