參數(shù)資料
型號: 935242220557
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP208
封裝: PLASTIC, SOT-316, SQFP-208
文件頁數(shù): 144/148頁
文件大?。?/td> 692K
代理商: 935242220557
1998 Apr 09
95
Philips Semiconductors
Product specication
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
Table 85 Chrominance saturation control
7.12.8
CHROMA KEY
Table 86 Chroma key range
D7
D6
D5
D4
D3
D2
D1
D0
GAIN
01111111
1.999 (max. saturation)
01000000
1 (CCIR level)
00000000
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
VU
23 to 16
RW
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
UL
15 to 8
RW
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
UU
7 to 0
RW
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
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