參數(shù)資料
型號(hào)： MTV212MN64
廠商： Electronic Theatre Controls, Inc.
英文描述： 8051 Embedded Monitor Controller Flash Type with ISP
中文描述： 8051嵌入式控制器的閃存供應(yīng)商監(jiān)視器類型
文件頁(yè)數(shù)： 9/23頁(yè)
文件大小： 167K
代理商： MTV212MN64
MYSON
TECHNOLOGY
MTV212A32
(Rev. 1.2)
Revision 1.2 - 9 - 2000/07/04
H/V SYNC Processor Block Diagram
6.1 Composite SYNC separation/insertion
The MTV212A32 continuously monitors the input HSYNC, if the vertical SYNC pulse can be extracted from
the input, a CVpre flag is set and user can select the extracted "CVSYNC" for the source of polarity check,
frequency count, and VBLANK output. The CVSYNC will have 8us delay compared to the original signal.
The MTV212A32 can also insert pulse to HBLANK output during composite VSYNC’s active time. The insert
pulse’s width is 1/8 HSYNC period and the insertion frequency can adapt to original HSYNC.
6.2 H/V Frequency Counter
MTV212A32 can discriminate HSYNC/VSYNC frequency and saves the information in XFRs. The 14 bits
Hcounter counts the time of 64xHSYNC period, then load the result into the HCNTH/HCNTL latch. The
output value will be [(128000000/H-Freq) - 1], updated once per VSYNC/CVSYNC period when
VSYNC/CVSYNC is present or continuously updated when VSYNC/CVSYNC is non-present. The 12 bits
Vcounter counts the time between two VSYNC pulses, then load the result into the VCNTH/VCNTL latch.
The output value will be (62500/V-Freq), updated every VSYNC/CVSYNC period. An extra overflow bit
indicates the condition of H/V counter overflow. The VFchg/HFchg interrupt is set when VCNT/HCNT value
changes or overflow. Table 4.2.1 and table 4.2.2 shows the HCNT/VCNT value under the operations of
12MHz.
Hself
Hpol
CVpre
Vbpl
VSYNC
Digital Filter
Polarity Check &
Sync Seperator
Vpre
Present
Check
Vfreq
Vpol
Polarity Check &
Freq. Count
XOR
VBLANK
Vself
XOR
HSYNC
Digital Filter
CVSYNC
Present
Check
Hpre
Hfreq
Present Check &
Freq. Count
Hbpl
XOR
HBLANK
XOR
Composite
Pulse Insert
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MTV212MV64I 制造商:Myson Century Inc 功能描述:IC, 8051 EMBEDDED MONITOR CONTROLLER FLASH TYPE WITH ISP, PLCC44
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