TA1270BFG Datasheet, PDF (27/39 Pages) Toshiba Semiconductor – PAL / NTSC VIDEO CHROMA AND SYNC PROCESSING SYSTEM FOR PIP / POP / PAP

TA1270BFG
Switching block (Unless otherwise specified, SYNC / SW V_CC = 9 V, DAC / C V_CC = 5 V, preset bus data, Ta = 25°C ± 3°C)
NOTE
CHARACTERISTIC
TEST CONDITION
SUB ADDRESS & DATA
00
01
02
SW MODE
TEST METHOD
S1
Y Gain
(Through Mode)
SW2 SW6 SW8 SW9 (1) Input signal 2 to Yin2 input.
A
B
―
A
(f0 = 100 kHz, picture period amplitude = 0.2 V_p-p)
or
or (2) Apply DC = 5 V to Ys input (Pin 32).
A
B
(3) Input signal 2 to Y1 input (Pin 29).
80
80
80
SW10 SW11 SW14 SW16 _{(4) Measure the output amplitude of Y / G output (Pin 20) and calculate the}
gain from the input.
B
B
A
― ^{(5) Input signal 2 to Y2 input (Pin 25), set Ys input (Pin 32)}
DC = 0 V, and repeat (3) and (4) above.
(Y1~Y / G ; GY1, Y2~Y / G ; GY2)
SW2 SW6 SW8 SW9 (1) Same as (1) and (2) for S1 above.
S2
Color Difference Gain
(Through Mode)
80
80
81
A
A
B
B (2) Input signal 2 to B-Y1 input (Pin 30) and input +90° phase signal of signal
or
or
or
or
2 to R-Y1 input (Pin 30).
82
or
B
A
A _{(3) Measure the amplitude of the B-Y / B output and the R-Y / R output and}
83
SW10 SW11 SW14 SW16
calculate the gain from the input.
A
A
A
― ^{(4) Input signal 2 to B-Y2 input (Pin 26) and input +90° phase signal of signal}
or
or
2 to the R-Y2 input (Pin 27).
B
B
(5) Set the Ys input pin DC = 0 V and repeat (4) above.
(B-Y1~B-Y / B ; GBY1, R-Y1~R-Y / R ; GRY1
B-Y2~B-Y / B ; GBY2, R-Y2~R-Y / R ; GRY2)
S3
Y Gain
(Matrix Mode)
SW2 SW6 SW8 SW9 _{(1) Same as (1) and (2) for S1 above.}
80
80
81
A
B
―
A _{(2) Change the sub address (06) data to PAL (81h), NTSC1 (82h), and}
or
or
or
NTSC2 (83h), perform the following.
82
A
B
or
(3) Input signal 2 to Y1 input (Pin 29), measure the amplitude of Y / G output,
83
SW10 SW11 SW14 SW16
B-Y / B output, R-Y / R output, and calculate the gain from the input.
(Y1~Y / G : PAL ; GY1GP, NTSC1 ; GY1GN1, NTSC2 ; GY1GN2
B
B
A
―
Y1~B-Y / B : PAL ; GY1BP, NTSC1 ; GY1BN1, NTSC2 ; GY1BN2
Y1~R-Y / B : PAL ; GY1RP, NTSC1 ; GY1RN1, NTSC2 ; GY1RN2)
27
2005-08-18