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TB1227CNG Datasheet(PDF) 39 Page - Toshiba Semiconductor

Part No. TB1227CNG
Description  VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV
Download  94 Pages
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB1227CNG Datasheet(HTML) 39 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
39
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
SW MODE
SUB-ADDRESS & BUS DATA
NOTE
ITEM
S39
S42
S44
S45
S51
04H 08H 0FH 10H 13H 14H
MEASURING METHOD
(1) Set the bus data so that black expansion is on and black expansion point is
maximum.
(2) Supply 1.0V to pin 39 (Black Peak Hold).
(3) Supply 2.9V to the APL of pin 44.
(4) Connect the power supply to pin 45
(Y1 IN). While raising the supply
voltage from the level measured in the
preceding item Y1, measure voltage
change at pin 37 (Y1out).
(5) Set the bus data to center the black
expansion point, and perform the
same measurement as the above
steps 2 through 4.
Y11
Black Expansion Start
Point
A
C
A
A
A
20H 04H 00H 00H BAH Vari-
able
(6) Set the black expansion point to the minimum by setting the bus data, and perform
the same measurement as the above steps 2 through 4.
(7) While supplying 2.2V to the APL of pin 44, perform the same measurement as the
above step 4 with the black expansion point set to maximum, center and minimum.
Y12
Black Peak Detection
Period (Horizontal)
Black Peak Detection
Period (Vertical)
B
E3H
In the condition of the Note Y1, measure waveform at pin 39 (Black Peak Hold).


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