參數(shù)資料
型號: SAA7146A
廠商: NXP Semiconductors N.V.
英文描述: Multimedia bridge, high performance Scaler and PCI circuit SPCI
中文描述: 多媒體橋梁,高性能潔牙機和PCI電路SPCI
文件頁數(shù): 95/144頁
文件大?。?/td> 645K
代理商: SAA7146A
1998 Apr 09
95
Philips Semiconductors
Product specification
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
Table 85
Chrominance saturation control
7.12.8
C
HROMA KEY
Table 86
Chroma key range
D7
D6
D5
D4
D3
D2
D1
D0
GAIN
0
0
0
1
1
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1.999 (max. saturation)
1 (CCIR level)
0 (colour off)
OFFSET
(HEX)
NAME
BIT
TYPE
DESCRIPTION
74
VL
31 to 24
RW
set lower limit V for chroma keying (8-bit; twos complement):
1000 0000: as maximum negative value =
128 signal level
0000 0000: limit = 0
0111 1111: as maximum positive value = +127 signal level
set upper limit V for chroma keying (8-bit; twos complement):
1000 0000: as maximum negative value =
128 signal level
0000 0000: limit = 0
0111 1111: as maximum positive value = +127 signal level
set lower limit U for chroma keying (8-bit; twos complement):
1000 0000: as maximum negative value =
128 signal level
0000 0000: limit = 0
0111 1111: as maximum positive value = +127 signal level
set upper limit U for chroma-keying (8-bit; twos complement):
1000 0000: as maximum negative value =
128 signal level
0000 0000: limit = 0
0111 1111: as maximum positive value = +127 signal level
VU
23 to 16
RW
UL
15 to 8
RW
UU
7 to 0
RW
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