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TB1274BFG

TOSHIBA Bi-CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC

Toshiba 

TB1274BFG

ITEM / Number of bits

FUNCTION

VARIABLE RANGE

PRESET

N-COMB / ①

VIDEO SELECT / ④

RGB SELECT / ②

HALF TONE / ①

Cb/Cr-MUTE / ①

Cb/Cr OFFSET1 /

④/④

Cb/Cr OFFSET2 /

④/④

V-FREQ / ③

V C/D MODE / ②

AFC SENS / ②

MVM / ①

S R-Y ADJ / ④

S B-Y ADJ / ④

BELL/HPF / ②

BELL f0 / ①

S V-ID SW / ①

S GP / ②

S ID / ①

S-INHBT / ①

RGB1 ENB / ①

1H addition switch, when NTCS.

Selection of input video signals

Selection of input sources.

Refer to FUNCTION DESCRIPTION.

Half tone gain switch

Cb/Cr output mute switch

Cb/Cr offset adjustment (main route)

0 : OFF, 1 : ADD

Refer to

FUNCTION DESCRIPTION.

00 : Main, 01 : YCbCr1

10 : RGB1, 11 : don’t use

0 : -10dB, 1 : -6dB

0 : OFF, 1 : ON

0 H : -12 ～ F H : +10.5mV

OFF

0000

Main

-10dB

OFF

0mV

Cb/Cr offset adjustment (YCbCr2 0 H : -12 ～ F H : +10.5mV

0mV

input)

V count down frequency switch.

000 : Automatic mode 1,

Automatic

Automatic mode 1 ;

001 : 50Hz, 010 : 60Hz,

mode 1

50/60Hz automatic distinction. At 011 : Automatic mode 2,

no-signal, the last statement is 100 : Forced 312.5H (AFC

kept. Right after power-on, 50Hz free-run),

mode is run.

101 : Forced 262.5H (AFC

Automatic mode 2 ;

free-run),

50/60Hz automatic distinction. And 110 : Forced 313H (AFC

50Hz mode is run at no-signal.

free-run),

Refer to FUNCTION DESCRIPTION. 111 : Forced 263H (AFC free-run)

V count down judge switch.

00 :Normal 1, 01 : Teletext,

Normal 1

Refer to FUNCTION DESCRIPTION. 10 : Fast, 11 : Normal 2

note)

Normal 1 : One time detection

Normal 2 : Continuously detection

AFC sensitivity switch

00 : +6dB, 01 : 0dB,

+6dB

10 : -6dB, 11 : -17dB

(data : 00)

Macrovision Mask + AFC Mask

0 : Narrow, 1 : Always masked Narrow

SECAM R-Y black adjustment

0 H : -10 ～ F H : 8.8mV

0mV

SECAM B-Y black adjustment

0 H : -10 ～ F H : 8.8mV

0mV

SECAM bell/HPF switching. Or the 00 : Bell, 01 : Boost 1,

Bell

high frequency side on SECAM bell 10 : Boost 2, 11 : HPF

filter is boosted.

Refer to FUNCTION DESCRIPTION.

BELL f0 adjustment

0 : Normal, 1 : +15kHz

Normal

SECAM V-ID switch

0 : OFF, 1 : ON

OFF

SECAM gate position adjustment (Its 00 : Normal, 01 : 0.4μs delay,

Normal

width is same)

10 : Normal, 11 : 0.4μs forward

SECAM sensitivity switch

0 : Normal, 1 : Low

Normal

SECAM inhibition switch

0 : Normal, 1 : Inhibited

Normal

Enable YS3 to switch to RGB1-IN. 0 : Disable, 1 : Enable

Disable

Refer to FUNCTION DESCRIPTION.

11

2005-08-18

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