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THS8083APZP датащи(PDF) 54 Page - Texas Instruments

номер детали THS8083APZP
подробное описание детали  Triple 8-Bit, 80 MSPS 3.3-V Video and Graphics
PDF  63 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

THS8083APZP датащи(HTML) 54 Page - Texas Instruments

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Examples:
1.
For generating the XGA@75Hz pixel clock of 78.75 MHz, with F(XTL) = 14.381818 MHz and
VCODIV=8:
NOM_INC = [32x14.31818x8]/[78.75x2] = 23.272724...
Since 23d = 17h and INT(0.272724
… x 2^27) = 36604438d = 22E8A16 hex, this can be written as
0x17.22E8A16 or as a contiguous 33 bit number: 010111010001011101000101000010110 = 0BA2E8A16
hex, i.e., the default setting for NOM_INC (see register map).
To achieve lock with an incoming HS, TERMCNT is programmed with 1312 (i.e., the total number of pixels
per line in this mode).
Below are the settings for popular video and graphics modes.
VESA MODES
Mode #1: 640x350 at 85 Hz
→ fpix = 31.5 MHz, N = 832
REGISTER NAME
VALUE
(DEC)
VALUE
(HEX)
REGISTER VALUE
(HEX)
TERM_CNT_0
832
340
40
TERM_CNT_1
832
340
03
NOM_INC_0
9c
NOM_INC_1
2c
NOM_INC_2
29.090905
1d.0ba2c9c
ba
NOM_INC_3
29.090905
1d.0ba2c9c
e8
NOM_INC_4
0
VCO_DIV
8
8
3
SEL_CLK
4
4
2
Mode #2: 640x400 at 85 Hz
→ fpix = 31.5 MHz, N = 832 (same settings as 640x350 at 85 Hz)
Mode #3: 720x400 at 85 Hz
→ fpix = 35.5 MHz, N = 936
REGISTER NAME
VALUE
(DEC)
VALUE
(HEX)
REGISTER VALUE
(HEX)
TERM_CNT_0
936
3a8
a8
TERM_CNT_1
936
3a8
03
NOM_INC_0
fa
NOM_INC_1
23
NOM_INC_2
25.813057
19.68123fa
81
NOM_INC_3
25.813057
19.68123fa
ce
NOM_INC_4
0
VCO_DIV
8
8
03
SEL_CLK
4
4
02



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