TA1383AFG Datasheet, PDF (9/47 Pages) Toshiba Semiconductor – NTSC Chroma Decoder, Multi-Point Scan Sync Processor, H/V Frequency Counter IC for Color TV

Signal
H-SEP LVL
V-SEP LVL
D-SY2 SEP LVL
AFC-MODE
NOISE LVL
MONITOR
TA1383AFG
Function
Power-On Initial Value
Switches sync separation level of horizontal sync signal.
Switches sync separation level of horizontal sync signal input to sync input
pins.
At 525I
00: 20% 01: 27% 10: 34% 11: 40%
At 525P
00: 20% 01: 30% 10: 40% 11: 50%
Three-level sync 00: 25% 01: 35% 10: 45% 11: 55%
Switches sync separation level of vertical sync signal.
Switches sync separation level of vertical sync signal input to sync input pins.
At 525I
00: 40% 01: 50% 10: 60% 11: 70%
At 525P
00: 20% 01: 30% 10: 40% 11: 50%
Three-level sync 00: 25% 01: 35% 10: 45% 11: 55%
Switches sync separation level of D-SYNC2 IN (pin 6).
Switches sync separation level of sync signal input to pin 6.
00: 20% 01: 30% 10: 40% 11: 50%
Switches AFC gain.
Switches AFC gain setting mode.
000: AUTO1 (normal: 0dB, at skew: +6dB, at noise: −12dB)
001: AUTO2 (AUTO1 + prevention against AFC disoperation at noise +
stabilization of AFC in weak electric field + ghost prevention)
010: AUTO3 (Video input mode: AUTO2 + 0dB at V-SKEW detected)
011: AUTO4 (RF input mode: AUTO2 + 0dB at V-SKEW detected, however,
−12dB at normal. Also, AFC gain is not controlled by noise detection
result)
100: Forced +6dB
101: Forced 0dB
110: Forced −12dB
111: Forced Off (horizontal free running)
Note: Set AUTO1 to 4 according to input signal status.
Switches noise detection level.
Switches noise detection level. Noise is detected only in NTSC signals (525I).
Noise detection result is reflected in BUS READ and AFC-GAIN operation (as
in AUTO1 to 3 modes).
00: max 11: min
Switches MONITOR output.
Switches signal output from MONITOR OUT (pin 8).
Field identification output is valid for 525I and 1125I standard signal.
000: 1-bit DAC output (high)
001: 1-bit DAC output (low)
010: Field identification output (ODD: low, EVEN: high)
011: Noise detection output
100: V sync separation output at 525I
101: Skew detection output
110: Clamp pulse output
111: H/V-SYNC at D-SYNC2 input
20%
(00)
40%
(00)
20%
(00)
Forced +6dB
(100)
max
(00)
DAC HIGH
(000)
9
2005-09-05