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UPSD323X bảng dữ liệu(PDF) 87 Page - STMicroelectronics

tên linh kiện UPSD323X
Giải thích chi tiết về linh kiện  Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM
PDF  176 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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UPSD323X bảng dữ liệu(HTML) 87 Page - STMicroelectronics

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µPSD323X
Host Type Detection
The detection procedure conforms to the se-
quences proposed by VESA Monitor Display Data
Channel (DDC) specification. The monitor needs
to determine the type of host system:
s
DDC1 or OLD type host.
s
DDC2B host (Host is master, monitor is always
slave)
s
DDC2B+/DDC2AB(ACCESS.bus) host.
Figure 41. Host Type Detection
AI06644
Is VSYNC present?
Has a command
been received?
Is 2B+/A.B
command detected?
Is
DDC2B+/DDC2AB?
Is it DDC2B
command?
Power on
Communication
isidle
EDID sent continously using
VSYNC as clock
Is DDC2 clock
present?
Stop sending of EDID
switch to DDC2
communication mode
DDC2 communication
is idle.
Respond to
DDC2B command
Respond to DDC2B+/
DDC2AB command



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