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參數(shù)資料
| 型號： | VV6501 |
| 廠商： | 意法半導體 |
| 英文描述： | DUAL-MODE DIGITAL CAMERA CO-PROCESSOR |
| 中文描述： | 雙模式數(shù)字相機協(xié)處理器 |
| 文件頁數(shù)： | 6/44頁 |
| 文件大?。?/td> | 351K |
| 代理商： | VV6501 |
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Introduction
STV0681
6/44
ADCS 7283313C
1.1.6
“Delete Last” function
An additional user interface function is available in STV0681 with either audio record or playback
hardware fitted. With these, the user can delete the last image or continuous clip to be captured, or
the last audio memo to be recorded. The standard “Clear all” (“CL”) function remains, whether or not
audio hardware is fitted.
1.1.7
Backward compatibility with STV0680B
STV0681 is electrically and functionally compatible with cameras designed for STV0680B, and uses
the same PC/Mac drivers, however the change of device pinout means that some PCB re-design
will be required.
Precise design guidelines are available from ST as a reference design (see
Chapter 10
). A software
development kit (SDK) for PC is available from ST to interface to the camera and provide the basis
to develop a custom software application for stills and/or video. It includes colour processing
software.
1.2
Key system features
The key features of a typical camera based on the STV0681 chipset are listed here below.
1.2.1
Image features
G
Support for CIF resolution sensor - 352 x 288 pixels
G
Support for VGA resolution sensor - 640 x 480 pixels
G
80 picture storage capacity possible for CIF, with 64MB memory
G
26 picture storage capacity for VGA, with 64MBit memory
G
A greater number of images can be stored when ‘Low’ resolution mode is enabled (e.g. 80 QCIF
images with 16Mbit memory, 107 QVGA images with 64Mbit memory). See
Table 1
.
G
Automatic anti-flicker exposure and gain control
G
Support for flashgun.
Figure 1: Typical camera system block diagram
CMOS Sensor
VV6411 (CIF)
Sensor data
STV0681
USB interface
to PC
16MBit or 64MBit
SDRAM
Lens +
IR Filter
RS232
I/F
USB
I/F
memory
I/F
RS232 interface
to PC
GPIO
Sensor
I/F
PWM
LED
4.5 - 6v Battery e.g.
3-4 x AA, AAA, etc.
12MHz XTAL
Audio DAC
LCD
Driver
2 x 7 seg. LCD
Push
Buttons:
Transceiver
Circuit (Discretes)
Piezo
Buzzer
“Mode”
“Shutter
/Record”
4-5v (Nominal) supply from Battery or USB
Power
Management
Circuit (Discretes)
Detect Low
Battery
Sensor clock
VV6501 (VGA)
Image Array
Audio
Pre-Amp
Speaker
Microphone
Comparator
OEM Flashgun
Module
Enable/Trigger
Audio
Enable/Trigger
Flashgun
Amplifier
VReg
3v3 supply
Subject
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