MYSON

TECHNOLOGY

MTV012E

MTV012E Revision 1.2 12/23/1998

6/14

5

60.53

102h / 258

183h / 387

6

66.67

0EAh / 234

15Fh / 351

7

70.069

0DEh / 222

14Eh / 334

8

70.08

0DEh / 222

14Eh / 334

9

72

0D9h /217

145h / 325

10

72.378

0D7h / 215

143h / 323

11

72.7

0D6h / 214

142h / 322

12

87

0B3h / 179

10Dh / 269

*1. The V-Freq output (VF8 - VF0) is valid.

*2. The tolerance deviation is + 1 LSB.

4.3 H/V Present Check

The H present function checks the input HSYNC pulse; the Hpre flag is set when HSYNC is over 10KHz

or cleared when HSYNC is under 10Hz. The V present function checks the input VSYNC pulse; the Vpre

flag is set when VSYNC is over 40Hz or cleared when VSYNC is under 10Hz. The control bit "PREFS"

selects the time base for these functions. The HPRchg interrupt is set when the Hpre value changes.

The VPRchg interrupt is set when the Vpre/CVpre values change. However, the CVpre flag interrupt

may be disabled when S/W disables the composite function.

4.4 H/V Polarity Detection

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.

4.5 Output HBLANK/VBLANK Control and Polarity Adjustment

HBLANK is the MUX output of HSYNC and the self-test horizontal pattern. The VBLANK is the MUX

output of VSYNC, CVSYNC and the self-test vertical pattern. The MUX selection and output polarity are

S/W controllable. The VBLANK output is cut off when VSYNC frequency is over 200Hz or 133Hz

depends on 8MHz/12MHz OSC selection. HBLANK/VBLANK shares the output pin with P4.1/ P4.0.

4.6 Self-Test Pattern Generator

This generator can generate 4 display patterns for testing purposes: positive cross-hatch, negative

cross-hatch, full white and full black (shown in the following figure). It was originally designed to support

monitor manufacturers to do a burn-in test, or offer the end-user a reference to check the monitor. The

generator's output STOUT shares the output pin with P4.2.

Display Region

Self-Test Patterns (1)