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TB1227CNG Datasheet(PDF) 72 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) 72 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
72
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
S21 S22 S31 S33 S34 S51
00H 05H
MEASURING METHOD
T15
Brightness Control
Characteristic
B
B
B
B
B
A
FFH
00H
10H
T16
Brightness Center
Voltage
80H
T17
Brightness Data
Sensitivity
———
——
(1) Short circuit pin 31 (Y IN), pin 33 (B-Y IN) and pin 34 (R-Y IN) in
AC coupling.
(2) Input 0.3V synchronizing signal to pin 51 (Sync IN).
(3) Set bus data so that R, G, B cut off data are set at center value.
(4) Connect pin 21 (Digital Ys) and pin 22 (Analog Ys) to ground.
(5) While changing bus data on brightness from maximum to
minimum, measure video voltage of pin 13 (G OUT) to find
maximum and minimum voltages (max : Vbrmx, min : Vbrmn).
(6) With bus data on brightness set at center value, measure video
voltage of pin 13 (G OUT) (Vbcnt).
(7) On the conditon that bus data with which Vbrmx is obtained in
measurement of the above step 5 is Dbrmx and bus data with
which Vbrmn is obtained in measurement of the above step 5 is
Dbrmn, calculate sensitivity of brightness data (∆Vbrt).
∆Vbrt = (Vbrmxg − Vbrmng) / (Dbrmxg − Dbrmng)
T18
RGB Output Voltage
Axes Difference
———
——
(1) In the same manner as the Note T16, measure video voltage of pin
12 (B OUT) with bus data on brightness set at center value.
(2) Find maximum axes difference in the brightness center voltage.
(1) Set bus data so that contrast and Y sub contrast are maximum and
brightness is minimum.
T19
White Peak Limit
Level
00H 1FH
(2) Input TG7 sine wave signal whose
frequency is 100kHz and amplitude
in video period is 0.9V to pin 31
(Y IN).
(3) Connect pin 21 (Digital Ys) and pin
22 (Analog Ys) to ground.
(4) While turning on / off WPL with bus,
measure video amplitude of pin 14
(R OUT) with WPL being activated
(Vwpl).


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