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TB1227CNG Datasheet(PDF) 40 Page - Toshiba Semiconductor

Part No. TB1227CNG
Description  VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB1227CNG Datasheet(HTML) 40 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
40
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
Y13
Picture Quality Control
Peaking Frequency
A
C
A
B
A
3FH 04H 80H 00H BAH
Vari-
able
(1) Set the bus data so that picture quality control frequency is 2.5MHz.
(2) Input TG7 sine wave (sweeper) signal whose video level is 0.1V to pin 45 (Y1 IN)
and pin 51 (Sync. IN).
(3) Maximize the picture quality control data.
(4) While observing Y1out of pin 37, find an SG frequency as the waveform amplitude
is maximum (fp25).
(5) Set the bus data so that picture quality control frequency is 3.1MHz and 4.2MHz,
and perform the same measurement as the above steps 2 through 4 at the
respective frequencies (fp31, fp42).
Y14
Picture Quality Control
Maximum
Characteristic
(1) Input TG7 sine wave (sweeper) signal whose video level is 0.1V to pin 45 (Y1 IN)
and pin 51 (Sync. IN).
(2) Set the picture quality control data to maximum.
(3) Set the picture quality control frequency is 2.5MHz by setting the bus data.
(4) Measure amplitude (V100k) of the output of pin 37 (Y1 OUT) as the SG frequency
is 100kHz, and the amplitude (Vp25) of the same as the SG frequency is 2.5MHz.
GS25MX = 20ℓog (Vp25 / V100k)
(5) Set the picture quality control frequency data to 3.1MHz by setting the bus data.
(6) Measure amplitude (V100k) of the output of pin 37 (Y1 OUT) as the SG frequency
is 100kHz, and the amplitude (Vp31) of the same as the SG frequency is 3.1MHz.
GS31MX = 20ℓog (Vp31 / V100k)
(7) Set the picture quality control frequency to 4.2MHz by setting the bus data.
(8) Measure amplitude (V100k) of the output of pin 37 (Y1 OUT) as the SG frequency
is 100kHz, and the amplitude (Vp42) of the same as the SG frequency is 4.2MHz.
GS42MX = 20ℓog (Vp42 / V100k)


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