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11 / 60 page STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000 PRELIMINARY CDSTV0680F-C Commercial in confidence 11 STV0680F_contents.fm settings for the VV6444 colour set. This means that a VV6404 should not be used with STV0680/680A. For IR filter design, the best choice filter follows the GS0034 dielectric stack filter specification, which is available from ST. An alternative, although not optimal filter, would be Schott S8612 doped glass, also sold as CM500. 2.1.2 VV6410 VV6410 is a CIF resolution, 3.3V CMOS imaging sensor. A brief specification is shown in Section 7. A dual design to support VV6444 and VV6410 is not possible, since VV6410 is a 3v3 sensor. A dual footprint for VV6410 and VV6500 is not possible since the package types differ, however, the same support circuit is used. See Section 9. 2.1.3 VV6500 VV6500 is a VGA resolution, 3.3V CMOS imaging sensor. A brief specification is shown in Section 7. A dual design to support VV6444 and VV6500 is not possible, since VV6500 is a 3v3 sensor. A dual footprint for VV6410 and VV6500 is not possible since the package types differ, however, the same support circuit is used. See Section 9. 2.2 User interface The user interface supported by STV0680A comprises of user controls, audible signals and visual displays. 2.2.1 Push buttons The following are typical of the type of functions which are supported by the chipset. These functions are achievable with no more than 2 push buttons. 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 Section 3.. 2. Shutter button (Shutter/confirm action): This button allows the user to take a picture or confirm an action, as shown in Sec- tion 3. The modes of operation are described in Section 3. 2.2.2 LED indicator An LED display camera status, i.e. to show that the camera is in ‘Snapshot’ mode. 2.2.3 Picture counter using 2 x 7 segment display STV0680A stores a picture counter value, which shows how many images can still be captured. STV0680A 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 4 and Table 5). It is possible to clear the images stored in memory, in order to continue taking pictures, as shown in Table 6. In other modes, this LCD panel shows displays a 2-character code as shown in Table 6, which helps the user to navigate around the modes. Note: A CIF camera with STV0680A-002 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 STV0680A 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). The precise functionality of the user interface may vary from that of existing demonstration units. The version shown here is close to the actual functionality available in STV0680A. ! Note |
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Mô tả tương tự - STV0680-001 |
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