參數(shù)資料
型號: 935269343557
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP160
封裝: 28 X 28 MM, 3.40 MM HEIGHT, ROHS COMPLIANT, PLASTIC, SOT322-2, MS-022, QFP-160
文件頁數(shù): 117/143頁
文件大小: 696K
代理商: 935269343557
2004 Aug 25
75
Philips Semiconductors
Product specication
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
Table 59
αRGB-32 format
Table 60 RGB-24 packed format
PACKING WITHIN 32-BIT Dword
BIT 31 TO BIT 24
BIT 23 TO BIT 16
BIT 15 TO BIT 8
BIT 7 TO BIT 0
α/
RG
B
α/
VYU
BUS CYCLE
PACKING WITHIN 32-BIT Dword
BIT 31 TO BIT 24
BIT 23 TO BIT 16
BIT 15 TO BIT 8
BIT 7 TO BIT 0
1B1
R0
G0
B0
2G2
B2
R1
G1
3R3
G3
B3
R2
The following formats use two pixels per Dword and derive
RGB from RGB-24 by truncation or by error diffusion
dither. The byte phase of the first sample each line is
defined by LSB + 1 of DMA base. ‘
α’ is the colour key.
RGB-16 (5:6: 5): Red has 5 bits, Green has 6 bits,
Blue has 5 bits
RGB-15 (α :5:5:5): α-bit, Red has 5 bits, Green has
5 bits, Blue has 5 bits
RGB-15 (5 : 5 : α : 5): Red has 5 bits, Green has 5 bits,
α bit, Blue has 5 bits.
Table 61 RGB-16 formats Dword
7.11.1.2
YUV
All YUV formats are based on CCIR coding:
Luminance Y in straight binary:
Black: Y = 16 of 256 linear coding
White: Y = 235 of 256 linear coding.
Colour difference signals UV in offset binary:
No colour: U = V = 128 of 256 steps
Full colour: U = V = 128
±112 steps.
YUV4:2:2: U and V sampled co-sided with first
Y sample (of 2 samples in-line). Byte phase of the first
sample each line is defined by bit 0 and bit 1 of DMA
base address (see Table 62).
YUV4:1:1: U and V sampled co-sided with first
Y sample, (of 4 samples in-line), 8 samples are packed
in 3 Dwords (see Table 63).
PACKING WITHIN 32-BIT Dword
BIT 31 TO BIT 16
BIT 15 TO BIT 0
Pixel1
Pixel0
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