MTV038 ETC-unknow, MTV038 Datasheet - Page 6

• Manufacturer Part Number: MTV038
• Description: On-screen Display Controller For Crt/lcd Monitor
• Manufacturer: ETC-unknow

3.2 Address bus administrator
The administrator manages bus address arbitration of internal registers or user fonts RAM during external
data write in. The external data write through serial data interface to registers must be synchronized by inter-
nal display timing. In addition, the administrator also provides automatic increment to address bus when exter-
nal write using format (c).
3.3 Vertical display control
The vertical display control can generates different vertical display sizes for most display standards in current
monitors. The vertical display size is calculated with the information of double character height bit(CHS), verti-
cal display height control register(CH6-CH0).The algorithm of repeating character line display are shown as
Table 2 and Table 3. The programmable vertical size range is 270 lines to maximum 2130 lines.
The vertical display center for full screen display could be figured out according to the information of vertical
starting position register (VERTD) and VFLB input. The vertical delay starting from the leading edge of VFLB,
is calculated with the following equation:
Note:" v " means the nth line in the character would be repeated once, while " - " means the nth line in the
3.4 Horizontal display control
The horizontal display control is used to generate control timing for horizontal display based on double char-
acter width bit (CWS), horizontal positioning register (HORD), horizontal resolution register (HORR), and
HFLB input. A horizontal display line consists of (HORR*12) dots which include 360 dots for 30 display char-
Revision 1.1
Repeat Line
CH6,CH5=11
CH6,CH5=10
CH6,CH5=0x
TABLE 2. Repeat Line Weight of Character
TABLE 3. Repeat Line Number of Character
CH6 - CH0
Weight
Vertical delay time = ( VERTD * 4 + 1 ) * H
character would not be repeated.
CH4=1
CH3=1
CH2=1
CH1=1
CH0=1
+16
+17
+18
+1
+2
+4
+8
MYSON
TECHNOLOGY
0
v
v
-
-
-
-
-
1
v
v
v
v
-
-
-
Repeat Line Weight
2
v
v
v
v
-
-
-
+18*3
+18*2
+18
+16
3
v
v
v
v
-
-
-
+8
+4
+2
+1
4
v
v
v
v
-
-
-
5
v
v
v
v
-
-
-
6
v
v
v
v
-
-
-
-6-
7
v
v
v
v
-
-
-
Repeat Line #
Where H = one horizontal line display time
8
v
v
v
v
-
-
-
9
v
v
v
v
-
-
-
10
v
v
v
v
-
-
-
11
v
v
v
v
-
-
-
(Revision 1.1)
12
v
v
v
v
-
-
-
13
v
v
v
v
-
-
-
MTV038
14
v
v
v
v
-
-
-
15
v
v
v
v
-
-
-
2001/8/21
16
v
v
v
-
-
-
-
17
v
-
-
-
-
-
-