MTV112M View Datasheet(PDF) - Myson Century Inc

Part Name

Description

Manufacturer

MTV112M

8051 Embedded CRT Monitor Controller Flash Version

Myson Century Inc 

MYSON

TECHNOLOGY

MTV112M

(Rev 2.0)

interrupt is set when the Vpre/CVpre value changes. 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

The HBLANK is the mux output of HSYNC and 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. The 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 the

monitor manufacturer in performing a burn-in test, or to offer the end-user a reference to check the monitor.

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

Display Region

Positive Cross-Hatch

Negative Cross-Hatch

Full White

Full Black

Revision 2.0

-8-

2001/05/18

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