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TB1227CNG Datasheet(PDF) 77 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) 77 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
77
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C ; BUS = preset value)
SW MODE
SUB-ADDRESS & BUS DATA
NOTE
ITEM
S18 S19 S20 S21 S22 S31 S33 S51
15H 1CH
MEASURING METHOD
T35
Text RGB Output,
High Level
A
A
A
A
B
B
B
A
02H 80H
T36
OSD Ys ON, Low
Level
———
T37
OSD RGB Output,
High Level
———
(1) Input stepping signal whose amplitude is 0.3V in video period to pin
31 (Y IN) and pin 51 (Sync IN).
(2) Set bus data so that blanking and halftone are off.
(3) Connect power supply to pin 21 (Digital Ys). While impressing 0V
to it, measure pedestal level of pin 13 output signal (G OUT)
(Vpl13).
(4) Connect power supply to pin 19 (Digital G IN) and impress it with
2V.
(5) Raising supply voltage to pin 21 gradually from 0V, measure video
level of pin 21 after output signal of pin 13 changed (Vlx13).
(6) From measurement results of the above steps 3 and 5, calculate
high level in the text mode.
Vmt13 = Vtx13 − Vpt13
(7) Raising supply voltage to pin 21 further from that in the step 5,
measure level (Vtost) of pin 21 when the level of pin 13 output
signal changes from that in the step 5 to −6dB as halftone data is
set to ON (the 6th step of Notes T30 to T34).
(8) In the condition of the above step 7, raise voltage impressed to pin
19 to 3V and measure output voltage of pin 13 (Vos13).
(9) From results of the above steps 3 and 7, calculate high level of the
output in the OSD mode.
Vmos13 = Vos13 − Vpt13


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