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參數(shù)資料
| 型號： | THS8210PFP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | POWER, PLASTIC, TQFP-80 |
| 文件頁數(shù)： | 15/73頁 |
| 文件大?。?/td> | 2053K |
| 代理商： | THS8210PFP |
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THS8200/8210
‘ALL-FORMAT’ OVERSAMPLED COMPONENT VIDEO/PC GRAPHICS D/A SYSTEM WITH
THREE 11 BIT DAC’S, CGMS DATA INSERTION AND 525P MACROVISION
TM COPY
PROTECTION
SLES032—6/18/02 3:33 PM
POST OFFICE BOX 655303 DALLAS TEXAS 77265
22
Copyright 2001 Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data
and other specifications are design goals. Texas Instruments
reserves the right to change or discontinue these products
without notice.
0x19
csc_offs3
00000000
CSC Configuration example: HDTV YCbCr to HDTV RGB
Gd = –0.4577*Cr + Yd – 0.1831*Cb +328 (=0.6408*128*4)
Bd = 0*Cr + Yd + 1.8142* Cb – 929 (=-1.8142*128*4)
Rd = 1.5396* Cr +Yd +0*Cb – 788 (=-1.5396*128*4)
In a similar manner, it can be calculated that the programming array is in this case:
Sub-
address
Register name
Value
0x04
csc_r11
10000001
0x05
csc_r12
11010101
0x06
csc_r21
00000000
0x07
csc_r22
00000000
0x08
csc_r31
00000110
0x09
csc_r32
00101001
0x0A
csc_g11
00000100
0x0B
csc_g12
00000000
0x0C
csc_g21
00000100
0x0D
csc_g22
10000000
0x0E
csc_g31
00000100
0x0F
csc_g32
00000000
0x10
csc_b11
10000000
0x11
csc_b12
10111011
0x12
csc_b21
00000111
0x13
csc_b22
01000010
0x14
csc_b31
00000000
0x15
csc_b32
00000000
0x16
csc_offs1
00010100
0x17
csc_offs12
10101110
0x18
csc_offs23
10001011
0x19
csc_offs3
00010100
Clip/scale/multiplier (CSM)
There are limits on the code range of the video data if sampled according to ITU or SMPTE standards. In other
words, not the full 10-bit range [0:1023] is used to represent video pixels. For example, typically 64 decimal is the
lowest code allowed to represent a video signal and corresponds to the blanking level. Similarly, for Y typically the
maximum code is 940 decimal. Excursions outside this range can be the result of digital video processing.
THS8200/10 can handle such instantaneous excursions in either of two ways: by limiting the input codes to
programmable max/min values, or by allowing such excursions to occur.
Depending on which approach is chosen, the user can scale up the video data in the CSM to make sure the full-
scale dynamic range of the DAC is used for optimal performance when using limiting. Alternatively the
instantaneous excursions outside the code range can be output by the DAC in the analog output signal (allow
super-white/black in analog output) when this clipping is disabled.
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