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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)： | 48/73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
52
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.
Test functions
The user can activate a 75% SMPTE color bar test pattern when the device is configured in VESA mode using
register
setting
‘vesa_colorbars’.
The
width
of
each
color
bar
can
be
programmed
using
register
‘dtg1_vesa_cbar_size’.
The digital logic in front of the DACs can be completely bypassed and the DACs can be driven directly with levels
programmed from the I2C interface by activating register ‘dac_i2c_cntl’. In this case registers ‘dac<n>_cntl’ set the
DAC input codes. A fast or slow ramp signal can be internally generated and sent to the DACs using registers
‘tst_fastramp’ and ‘tst_slowramp’. This could be useful for a static DAC linearity test.
Alternatively the input bus can directly drive the DACs when register ‘tst_digbypass’ is activated for tests at full-
speed.
The delay of the Y channel can be changed in YCbCr modes with respect to Cb and Cr channels by programming
register ‘tst_ydelay’.
Finally there is a digital output port with data encoded according to ITU-R.BT656. This is a loop-through of the
original input bus, and thus will only provide standard data when input to THS8200/10 is provided in a 10-bit ITU-R
BT.656 format. This output bus could be used to connect to a separate NTSC/PAL video encoder. Register
‘data_clk656_on’ activates the clock output on this bus and register ‘data_tristate656’ will disable the output bus. It
is recommend to disable this output when not in use.
Powerdown
THS8200/10 implements two powerdown modes: ‘dac_pwdn’ powers down the DAC channels but keeps all digital
logic active. ‘chip_pwdn’ powers down the digital logic except the I2C interface. Activating both registers will
enforce a complete analog/digital powerdown except for the I2C interface.
CGMS Insertion / Macrovision
TM
THS8200/10 can embed data within the vertical blanking interval, encoded according to the EIA-805 data insertion
standard. CGMS is an implementation of the EIA-805 standard that defines data insertion in component video
interface (CVI) video signals. THS8200/10 implements data insertion for SDTV formats.
THS8210 additionally can encode the component video output signals according to the
‘Macrovision
TM AGC copy
protection waveforms for DVD applications with 525p (480p) progressive scan outputs’ specification revision 1.03
(December 22, 1999). When the analog output is Macrovision
TM encoded, presence of the copy protected material
is signaled by means of auxiliary data during the VBI. For additional information re. Macrovision
TM copy protection,
the user is advised to inform about technology licensing procedures with Macrovision Inc. directly. Copy protection
encoding, and its associated data insertion, is enabled by activating ‘cgms_macrovision_en’; this setting will have
an effect on THS8210 devices only.
THS8200/10 supports CGMS data insertion on line 41 of every frame in the 525P format. The data is inserted on
the Y channel only; Pb and Pr channels will remain at blanking level. CGMS data insertion is enabled by activating
register ‘cgms_en’ and programming registers ‘cgms_header’ and ‘cgms_payload’ appropriately. The user needs to
program header and payload data in the correct format, as no additional data encoding is done prior to insertion
into the analog DAC output. THS8200/10 only performs a ‘playout’ function for the programmed data. The CGMS
encoding block assumes that a full 10-bit video range is used in order to determine the 70% of peak-white
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