參數(shù)資料
型號(hào): M306V7FGFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 16.1 MHz, MICROCONTROLLER, PQFP100
封裝: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁(yè)數(shù): 80/298頁(yè)
文件大?。?/td> 2422K
代理商: M306V7FGFP
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Rev.1.40
Oct 06, 2004
page 170 of 296
M306V7MG/MH/MJ-XXXFP, M306V7FG/FH/FJFP
2.14.7 Reference Voltage Generating Circuit and Comparator
The composite video signal clamped by the clamping circuit is input to the reference voltage generating
circuit and the comparator 1 and 2.
(1) Reference voltage generating circuit
This circuit generates a reference voltage (slice voltage) by using the amplitude of the clock run-in
pulse in line specified by the data slice line specification circuit. Connect a capacitor between the
VHOLD pin and the VSS pin, and make the length of wiring as short as possible so that a leakage
current may not be generated.
Note: It takes a few tens of lines to generate slice voltage until the slice voltage becomes stable after
the data slicer is started. In this period, the slice data becomes unstable. For this reason, take
stabilization time into consideration when programming.
(2) Comparator 1
The comparator 1 compares the voltage of the composite video signal with the voltage (reference
voltage) generated in the reference voltage generating circuit, and converts the composite video sig-
nal into a digital value.
(3) Comparator 2
The comparator 2 compares the absolute standard voltage generated inside from the voltage and
power supply voltage of a composite video signal, and converts the composite video signal into a
digital value.
2.14.8 CC Start Bit ID1 Reference Detecting Circuit
This circuit detects a CC start bit ID1 reference bit at line decided in the data slice line specification
circuit.
In the case of CC start bit
1) Detect a clock run impulse at counting the input pulse of a data slice line.
2) When a clock run impulse is detected, the sampling clock outputted from a timing generating circuit
detects a start bit pattern, and judge CC start bit.
In the case of ID1 reference bit
1) Detect ID1 reference bit all over the window generated after fixed time from Hsep in a timing signal
generating circuit.
2.14.9 Clock Run-in Determination Circuit
Clock run in judging
By counting the number of pulses all over the specific window of a data slice line, it judges that it is clock
run in. When it judges with having no clock run in, the completion flag of a caption data latch is not set to
1. Moreover, the number of standard clocks counted in clock run impulse 1 cycle is stored in the bits 7-3
of a clock run in detection register (addresses 026916/030916).
ID1 reference bit judging
The number of standard clocks counted during fixed of ID1 reference bit is stored in the bits 5-0 of a
standard clock detection register (addresses 026C16/the 030C16). Read these bits after generating of
data slicer interruption ("(12) interruption demand generating circuit").
Clock run-in detection register is shown in Fig. 2.14.11, standard clock detection register is shown in Fig.
2.14.12.
相關(guān)PDF資料
PDF描述
M306V7FHFP 16-BIT, FLASH, 16.1 MHz, MICROCONTROLLER, PQFP100
M30800MC-XXXFP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP100
M30800MC-XXXGP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP100
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M306V7FGFS 功能描述:FLASH MCU/M16C(TV/VTR) RoHS:否 類別:編程器,開(kāi)發(fā)系統(tǒng) >> 配件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:適配器板 適用于相關(guān)產(chǎn)品:RCB230,RCB231,RCB212 配用:26790D-ND - RCB BREAKOUT BOARD RS232 CABLE
M306V7FHFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M306V7FJAFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M306V7FJFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M306V7FJFP#U0 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 512KB FLASH 3.3V 100PQFP - Trays