參數(shù)資料
型號: 9402AVK
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: 14 X 14 MM, 2 MM HEIGHT, PLASTIC, MS-022, MQFP-80
文件頁數(shù): 2/126頁
文件大?。?/td> 1673K
代理商: 9402AVK
DATA SHEET
10
Aug. 16, 2004; 6251-552-1DS
Micronas
In addition, a standard can be forced as well.
AMSTD50 selects whether PAL B or SECAM is tried
first in the automatic routine. AMSTD60 selects
whether NTSC44/PAL60 or NTSC M is tried first. Both
bits can also be set for automatic detection, then the
last detected chroma standard will be used. For
SECAM detection, a choice between different recogni-
tion levels is possible (SCMIDL, SCMREL) and the
evaluated burst position is shiftable (BGPOS).
Color standard (STDET), line standard (LNSTDRD)
and color killer status (CKSTAT) can be read out.
An Automatic Chroma Control (ACC) produces a sta-
ble output for input chroma variations from (approxi-
mately) -30 dB to +6 dB compared to nominal burst
value. The ACC reference value is programmable for NTSC
and PAL independently (NTSCREF, PALREF) to ensure
correct color saturation. With ACCFIX, the ACC is dis-
abled and a constant value (dependent on NTSCREF
and PALREF) is used instead.
ACCFRZ holds the current ACC value. The maximum
amplification of the ACC can be limited by ACCLIM.
This results a smooth attenuation of color intensity for
weak color carrier (see Fig. 2–5).
Fig. 2–5: Color Killer Adjustment
Table 2–3: Allowed combinations for color-standard
search (50 Hz)
Standard
CSTAND
(50 Hz)
D2
D1
D0
None
0
00
PAL N
0
01
PAL B
0
10
SECAM
1
00
Automatic
PAL BG / SECAM
1
10
Table 2–4: Allowed combinations for color-standard
search (60 Hz)
Standard
CSTAND
(60 Hz)
D6
D5
D4
D3
PAL M
0010
NTSC M
0100
NTSC44
1000
Automatic
PAL M / NTSC M
0110
Automatic
NTSC M /
NTSC44/PAL60
1100(!)
ACCLIM
CON
CKILL
U,V
attenuation of
color-carrier
+6dB
-4dB
+0dB
color off
CONS
CKILLS
U,V
attenuation of
color-carrier
+6dB
-4dB
+0dB
color off
PAL, NTSC operation
SECAM operation
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