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STV9937 bảng dữ liệu(PDF) 43 Page - STMicroelectronics

tên linh kiện STV9937
Giải thích chi tiết về linh kiện  120-MHz On-Screen Display for Monitors including PictureBooSTTM and 4 True Independent Window Displays
PDF  49 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV9937 bảng dữ liệu(HTML) 43 Page - STMicroelectronics

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STV9937
Application Hints
Re-allocation, reset, and writing new characters in windows
1. Disable windows.
2. Write new allocations.
3. Reset the windows.
4. Write new positions and sizes in control registers.
5. Write new color-boxes.
6. Write new characters and color-box data.
7. Enable windows.
10.2
Hardware Hints
●
The serial resistors on the ROUT, GOUT, BOUT, FBLK and PB outputs must be as close as
possible to the device.
●
Both decoupling capacitors (100 nF and 100 µF) must be as close as possible to the analog
(pin 13) and digital (pin5) power supplies (see Figure 15).
●
PLL network must be close to the device but far from the ROUT, GOUT, BOUT, FBLK and PB
outputs. PLL network and ROUT, GOUT, BOUT and FBLK outputs should be separated by the
AVDD 3.3 V power trace.
●
PLL ground (AGND) should not be connected either to DVSS or to other grounds of the
videoboard, as the ground is already connected internally.
●
It is better to supply the STV9937 device through ferrite beads (as an example the ferrite bead
could be 742 760 5 type from Würth Electronik) instead of traditional inductance that could
damage the OSD jitter with some parasitic resonance.



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