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TB1227CNG Datasheet(PDF) 69 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) 69 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
69
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 S42
00H 02H 05H 1BH 08H
MEASURING METHOD
(1) Input 0.3V synchronizing signal to pin 51 (Sync IN).
(2) Input 100kHz, 0.3Vp-p sine wave signal to both pin 33 (B-Y IN) and
pin 34 (R-Y IN).
(3) Connect pin 21 (Digital Ys) and pin 22 (Analog Ys) to ground.
(4) Set bus data so that drive is at center value and Y mute is on.
(5) While changing bus data on
unicolor from maximum (FF) to
minimum (00), measure maximum
and minimum amplitudes of pin 13
(G OUT) and pin 12 (B OUT) in
video period respectively, and read
the bus data together with.
Also, measure respective
amplitudes as unicolor data is set
at center value (80).
(Vn12mx, Vn12mn, D12n80)
(Vn13mx, Vn13mn, D13n80)
(Vn14mx, Vn14mn, D14n80)
T7
Unicolor Control
Characteristic
B
B
B
B
B
A
FFH
80H
00H
——
BFH
(6) Find ratio between amplitude with maximum unicolor data and that
with minimum unicolor data in conversion into decibel (∆V13un).
T8
Relative Amplitude
(NTSC)
A
A
A
A—
FFH
While inputting rainbow color bar signal (3.58MHz for NTSC) to pin 42
and 0.3V synchronizing signal to pin 51 so that video amplitude of pin
33 is 0.38Vp-p, find the relative amplitude
(Mnr-b = Vu14mx / Vu12mx, Mng-b = Vu13mx / Vu12mx).
T9
Relative Phase
(NTSC)
——
——
(1) In the test condition of the Note T8, adjust bus data on tint so that
output of pin 12 (B OUT) has the peak level in the 6th bar.
(2) Regarding the phase of pin 12 (B OUT) as a reference phase, find
comparative phase differences of pin 14 (R OUT) and pin 13
(G OUT) from the reference phase respectively (θnr-b, θng-b).


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