VV6411 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

VV6411

DUAL-MODE DIGITAL CAMERA CHIPSET

STMicroelectronics 

Detailed features

STV0680B + VV6444/6410/6500

1 Mode button (Wake-up/Switch between modes): This button allows the user (1.1) to wake the

camera up from standby mode when the camera is to be used for taking pictures, or (1.2) to

switch between modes of operation shown in Chapter 3.

2 Shutter button (Shutter/confirm action): This button allows the user to take a picture or confirm

an action, as shown in Chapter 3

The modes of operation are described in Chapter 3.

It may also be desirable to include an on-off slider switch. This has advantages and disadvantages,

and its exact function is discussed further in the reference design available from ST.

Where a flashgun module is included in the camera, it will be necessary to include a flash on/flash

off push button or slider switch, dependant on the exact flashgun module design. possible

implementations are discussed in a separate application note AN1312 regarding flashgun

implementation, available from ST.

2.2.2 LED indicator

An LED display camera status, i.e. to show that the camera is not in Standby/PC suspend mode.

2.2.3

Note:

Picture counter using 2 x 7 segment display

STV0680B stores a picture counter value, which shows how many images can still be captured.

STV0680B supports a 2x7 segment LCD panel. In ‘Snapshot’ mode and continuous capture mode,

this LCD panel displays the number of pictures still available, which is useful to identify when the

user is approaching the maximum number of images which can be stored (see Table 3). It is

possible to clear the images stored in memory, in order to continue taking pictures. In other modes,

this LCD panel shows displays a 2-character code, which helps the user to navigate around the

modes.

A CIF camera with STV0680B and 64Mbit SDRAM can store up to 320 images by using QCIF

mode. Where >99 images are still available, the LCD display will remain at 99. Where (no. of

images available) <99, the LCD display will show the number of images available, as is the case

with all other modes.

For suitable numeric LCD panel types, see Section 4.8.

2.2.4

Piezo buzzer

An on-chip Pulse Width Modulator (PWM) on STV0680B is used to generate buzzer sounds to

signal certain events. The following are typical of the type of events which are indicated by the

buzzer, and each has its own distinctive sound:

1 Camera has been ‘Woken up’ from standby mode (either by the user pressing a button, by re-

connecting the power source, or by connecting a USB/RS232 connection).

2 Camera has been ‘gone to sleep’ i.e. moved into standby mode. Pictures are retained in

memory.

3 Picture has been successfully taken after the user presses the capture button.

4 Picture has NOT been taken after the user presses the capture button. This indicates to the

user that there is insufficient light, or that the exposure control was not ready due to a rapid

change of lighting in the scene.

5 Picture has NOT been taken after the user presses the capture button, due to picture counter

having reached the maximum number of images. The user has the chance to zero the counter

if desired.

6 End of continuous capture in un-tethered ‘Continuous’ mode, due to memory full.

7 Self-timer activated and counting down.

12/63

Version 3.4

Share Link: