TA1276AFG Datasheet, PDF (21/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

TA1276AFG
Pin 41 H-out (mode SW)
You can select the Double Scan Mode (external CP (clamping pulse) input mode), by connecting Pin 41 to
DEF VCC. (the threshold of pin 23: 8.7 V = DEF VCC − 0.3 V)
When Double Scan Mode, function of Pin 38 and 40 are changed.
• Normal Scan (internal CP) Mode: Pin 41  H-out
The function of Pin 40 is curve correction input, that of Pin 38 is FBP (flay back pulse) input.
The input signals of Y2, U/I and V/I inputs (pin 1, 2 and 3), Analog OSD inputs (pin 18, 19 and 20),
Analog RGB inputs (pin 22, 24 and 25) are clamped of the internal CP based on the Y1/Sync input (pin
52).
• Double Scan (external CP input) Mode: Pin 41  H-out
The function of Pin 40 is EXT/BPP (Note 2) input, that of Pin 38 is H/V BLK (blanking) input.
The input signals of Y2, U/I and V/I inputs (pin 1, 78 and 80), Analog OSD inputs (pin 18, 19 and 20),
Analog RGB inputs (pin 22, 24 and 25) are clamped of the external CP based on Pin 40.
In case of Double Scan Mode, bus “V-BLK” should be set (1); OFF.
Terminal Functions
Pin No.
Mode
Pin 41
Pin 40
Pin 38
Pin 1, 78, 80
Pin 18, 19, 20
Pin 22, 24, 25
Pin 52
Pin 49
Pin 29
Normal Scan Mode
(internal CP)
H-out
Curve correction signal input
FBP input (for AFC-2 detection, H BKL)
Double Scan Mode
(external CP input)
DEF V_CC (9 V)
EXT CP/BPP input
H/V BLK input (for RGB H/V BLK, AKB)
Clamping by internal CP
(based on pin 52)
Clamping by external CP
(based on pin 40)
Normal scan; Y/Sync signal input
Normal scan; HD pulse output (based on pin 52)
Normal scan; VP output (based on pin 52)
Note 2: BPP: Black Peak detection stopping Pulse
21
2002-04-01