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TB1227CNG Datasheet(PDF) 83 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) 83 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
83
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
01H 06H
MEASURING METHOD
T55
Analog RGB Dynamic
Range
B
A
B
B
B
A
——
00H
———
(1) Input 0.3V synchronizing signal to pin 51 (Sync IN).
(2) Supply 5V of external supply voltage to pin 22 (Analog Ys).
(3) Set bus data so that contrast is minimum and drive is set at center
value.
(4) While inputting stepping signal to pin 24 (Analog G IN), increase
video amplitude gradually from 0.
(5) Measure video amplitude of pin 24 when video voltage of pin 13
(G OUT) does not change.
T56
RGB Brightness
Control Characteristic
——
FFH
00H
———
T57
RGB Brightness
Center Voltage
80H
T58
RGB 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 on RGB cutoff at center value.
(4) Supply 5V of external supply voltage to pin 22 (Analog Ys).
(5) While changing data brightness from maximum to minimum,
measure maximum and minimum voltages of pin 13 (G OUT) in
video period. (max : Vbrmx, min : Vbrmn)
(6) Set bus data on brightness at center value and measure video
voltage of pin 13 (G OUT) (Vbcnt).
(7) On the condition 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 = (Vbrmx − Vbrmn) / (Dbrmx − Dbrmn)
T59
Analog RGB Mode
ON Voltage
80H
(1) Input TG7 sine wave signal (f = 100kHz, video amplitude = 0.3V) to
pin 23 (Analog R IN).
(2) Supply 5V of external supply voltage to pin 22 (Analog Ys) and
raise the voltage gradually from 0V.
(3) Measure voltage at pin 22 when signal 1 is output from pin 14 (R
OUT) (Vanath).


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