MTV021 ETC-unknow, MTV021 Datasheet - Page 9

• Manufacturer Part Number: MTV021
• Description: Enhanced Super On-screen Display
• Manufacturer: ETC-unknow

3.10 Window and frame control
The display frame position is completely controlled by the contents of VERTD and HORD. The window size
and position control are specified in column 0 to 11 on row 15 of memory map, as shown in Figure 4. Window
1 has the highest priority, and window 4 is the least, when two windows are overlapping. More detailed infor-
mation is described as follows:
1. Window control registers,
ROW 15
START(END) ADDR - These addresses are used to specify the window size. It should be noted that when
WEN - Enable the window display.
WSHD - Enable shadowing on the window.
R, G, B - Specify the color of the relative background window.
2. Frame control registers,
ROW 15
VERTD - Specify the starting position for vertical display. The total steps are 256, and the increment of each
HORD - Define the starting position for horizontal display. The total steps are 256, and the increment of each
CH6-CH0 - Define the character vertical height, the height is programmable from 18 to 71 lines. The character
Column 12
Column 13
Column 14
1,4,7,OR 10
2,5,8,OR 11
0,3,6,OR 9
Column
Column
Column
step is 6 dots. The initial value is 15 after power up.
step is 4 Horizontal display lines. The initial value is 4 after power up.
vertical height is at least 18 lines if the contents of CH6-CH0 is less than 18. For example, when
the contents is " 2 ", the character vertical height is regarded as equal to 20 lines. And if the con-
MSB
MSB
MSB
MSB
MSB
b7
b7
b7
MYSON
TECHNOLOGY
-
b7
b7
b7
the start address is greater than the end address, the window will be disabled.
CH6
b6
b6
b6
ROW START ADDR
b6
b6
b6
COL START ADDR
COL END ADDR
CH5
b5
b5
b5
b5
b5
b5
CH4
b4
b4
b4
VERTD
HORD
CH3
b4
b4
b4
b3
b3
b3
LSB
9/17
MSB
CH2
b2
b2
b2
b3
b3
b3
LSB
LSB
CH1
ROW END ADDR
b1
b1
b1
WEN
b2
b2
b2
R
CH0
b0
b0
b0
LSB
LSB
b1
b1
b1
G
-
MTV021 Revision 5.0 6/29/1999
WSHD
b0
b0
b0
B
LSB
MTV021