參數(shù)資料
型號(hào): TDA4780
廠商: NXP SEMICONDUCTORS
元件分類: 消費(fèi)家電
英文描述: RGB video processor with automatic cut-off control and gamma adjust
中文描述: SPECIALTY CONSUMER CIRCUIT, PDIP28
封裝: 0.600 INCH, PLASTIC, DIP-28
文件頁數(shù): 13/44頁
文件大?。?/td> 321K
代理商: TDA4780
1997 Feb 06
13
Philips Semiconductors
Preliminary specification
RGB video processor with automatic
cut-off control and gamma adjust
TDA4780
Table 7
RGB processor mode bits control register
SYMBOL
PARAMETER
CONDITIONS
Control register 1
SC5
sandcastle 5 V
0 = 3-level sandcastle pulse
1 = 2-level sandcastle pulse
0 = delay
1 = no delay
0 = new data are executed just after reception
1 = data is held in a latch (buffer register) and will be transferred to their
destination register within the next vertical blanking interval; the device
does not acknowledge any new data transfer until the internal transfer to
the destination register has been completed
0 = PAL matrix
1 = NTSC matrix; hue position set on
2 degrees
DELOF
delay of leading edge of
clamping pulse switched off
BREN
buffer register enable
NMEN
NTSC matrix enable; note 1
Control register 2
HDTV
HDTV / progressive scan for
ADBL line counter
0 = 272 (PAL), 224 (NTSC) lines
1 = 544 (PAL), 448 (NTSC) lines
0 = normal mode
1 = cut-off measurement level during full field, brightness inactive
0 = automatic cut-off control active
1 = RGB outputs clamped to fixed DC levels
see Table 4
FSBL
full screen black level, e.g. for
optical measurement
BCOF
internal black level control off
FSON2
FSDIS1
FSDIS2
FSON1
fast switch 2 on
fast switch 1 disable
fast switch 2 disable
fast switch 1 on
Control register 3
ADBL
adaptive black
0 = off
1 = on
0 = input = 0.315 V (p-p) (black-white)
1 = input = 1.0 V (p-p) (black-white)
0 = inactive;
(BCOF = 0) AND (MOD2 = 1) is senseless, no output stabilization
1 = output clamp without brightness adjust, brightness remains active
e.g. for blue stretch
0 = off
1 = on
0 = pin 26 is switched to hue adjust output
1 = pin 26 is switched to Y output
0 = peak drive limit to absolute output
1 = peak drive limit relative to cut-off
time constant peak drive limiter 0 = 2f
H
1 = 1f
H
YHI
Y high level
MOD2
modus 2
BLST
blue stretch
YEXH
Y exclusive hue
RELC
relative to cut-off
TCPL
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