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MTV230M View Datasheet(PDF) - Myson Century Inc

Part Name
Description
Manufacturer
MTV230M Datasheet PDF : 31 Pages
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MYSON
TECHNOLOGY
MTV230M
(Rev 1.0)
6.2.1 H-Freq Table
H-Freq(KHZ)
1
31.5
2
37.5
3
43.3
4
46.9
5
53.7
6
60.0
7
68.7
8
75.0
9
80.0
10
85.9
11
93.8
12
106.3
Output Value (14 bits)
12MHz OSC (hex / dec)
0FDEh / 4062
0D54h / 3412
0B8Bh / 2955
0AA8h / 2728
094Fh / 2383
0854h / 2132
0746h / 1862
06AAh / 1706
063Fh / 1599
05D1h / 1489
0554h / 1364
04B3h / 1203
6.2.2 V-Freq Table
V-Freq(Hz)
1
56
2
60
3
70
4
72
5
75
6
85
Output value (12bits)
12MHz OSC (hex / dec)
45Ch / 1116
411h / 1041
37Ch / 892
364h / 868
341h / 833
2DFh / 735
6.3 H/V Present Check
The Hpresent function checks the input HSYNC pulse, Hpre flag is set when HSYNC is over 10KHz or
cleared when HSYNC is under 10Hz. The Vpresent function checks the input VSYNC pulse, the Vpre flag is
set when VSYNC is over 40Hz or cleared when VSYNC is under 10Hz. The HPRchg interrupt is set when
the Hpre value changes. The VPRchg interrupt is set when the Vpre/CVpre value changes. However, the
CVpre flag interrupt may be disabled when S/W disables the composite function.
6.4 H/V Polarity Detect
The polarity functions detect the input HSYNC/VSYNC high and low pulse duty cycle. If the high pulse
duration is longer than that of the low pulse, the negative polarity is asserted; otherwise, positive polarity is
asserted. The HPLchg interrupt is set when the Hpol value changes. The VPLchg interrupt is set when the
Vpol value changes.
6.5 Output HBLANK/VBLANK Control and Polarity Adjust
The HBLANK is the mux output of HSYNC and composite Hpulse. The VBLANK is the mux output of
VSYNC and CVSYNC. The mux selection and output polarity are S/W controllable.
6.6 VSYNC Interrupt
The MTV230M checks the VSYNC input pulse and generates an interrupt at its leading edge. The VSYNC
flag is set each time when MTV230M detects a VSYNC pulse. The flag is cleared by S/W writing a "0".
Revision 1.0
- 10 -
2000/11/15
 

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