參數(shù)資料
型號(hào)： THS8210PFP
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝： POWER, PLASTIC, TQFP-80
文件頁(yè)數(shù)： 14/73頁(yè)
文件大小： 2053K
代理商： THS8210PFP
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
21
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.
1/ Realize that this is a positive value so the sign bit of the integer part is ‘0’. (bit5 of csc_ric1=”0”)
2/ Note that there is no integer portion of the coefficient. (bit4-bit0 = “00000”)
3/ The binary representation of the fractional part can directly be constructed from the binary equivalent of
the fractional part multiplied by 1024 (.2126x1024 = 217.7), rounded to the nearest integer (218) and
represented binary as 10-bit number (0011011010).
Using the above method all the registers for the CSC blocks can be programmed with the correct value for RGB to
YCbCr conversion. Below is a complete list of register values for the above conversion.
0.2126 -> csc_ric1 = “000000”
csc_rfc1 = ” 0011011010”
0.7152 -> csc_gic1 = “000000” csc_gfc1 = ” 1011011100”
0.0722 -> csc_bic1 = “000000” csc_bfc1 = ” 0001001010”
-0.1172 -> csc_ric2 = “100000” csc_rfc2 = ” 0001111000”
-0.3942 -> csc_gic2 = “100000” csc_gfc2 = ” 0110010100”
0.5114 -> csc_bic2 = “000000” csc_bfc2 = “1000001100”
0.5114 -> csc_ric3 = “000000”
csc_rfc3 = “1000001100”
-0.4646 -> csc_gic3 = “100000” csc_gfc3 = “0111011100”
-0.0468 -> csc_bic3 = “100000” csc_bfc3 = “0000110000”
For the offsets necessary in the second and third equation registers csc_offset<n> need to be programmed. We
need to add 512 to Cb and Cr channels. The value to be programmed is th of this offset in a signed magnitude
representation, thus 128 or csc_offset2 = csc_offset3 = “0010000000”.
Packing these individual registers into the I2C register map, the programmed values are:
Sub-
address
Register name
Value
0x04
csc_r11
00000000
0x05
csc_r12
11011010
0x06
csc_r21
10000000
0x07
csc_r22
01111000
0x08
csc_r31
00000010
0x09
csc_r32
00001100
0x0A
csc_g11
00000010
0x0B
csc_g12
11011100
0x0C
csc_g21
10000001
0x0D
csc_g22
10010100
0x0E
csc_g31
10000001
0x0F
csc_g32
11011100
0x10
csc_b11
00000000
0x11
csc_b12
01001010
0x12
csc_b21
00000010
0x13
csc_b22
00001100
0x14
csc_b31
10000000
0x15
csc_b32
00110000
0x16
csc_offs1
00000000
0x17
csc_offs12
00001000
0x18
csc_offs23
00000010
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