ADVANCE INFORMATION
VCT 38xxA
0252 H
Bit
Write
Reset
00 H
BLANKING START
Function
all
horizontal start of blanking pulse or self-timed HSYNC in character increments
correct blanking pulse cannot be guaranteed if blanking start = blanking stop
0254 H
Write
Reset
0
DISPLAY MODE 1
Bit
7
Function
1 = OSD layer always uses FONT 1
0 = OSD layer changes from FONT 1 to FONT 2 if ASCII≥20H
6
1
1
0
0
1 = enable OSD layer
0 = disable OSD layer
5
1 = active flash phase of OSD layer
0 = inactive flash phase of OSD layer
4
1 = 13 scanlines/character
0 = 8 scanlines/character
3 to 0
With this scan line the OSD layer starts display of the first text line. By slow incrementing of this value soft
scroll begins.
0255 H
Write
Reset
0
DISPLAY MODE 2
Bit
7
Function
1 = OSD layer control code defines character set
0 = OSD layer control code defines color
3
2
1
0
1
1
0
1
1 = 10.125MHz display clock
0 = 20.25MHz display clock
1 = font pointer offset 10 scanlines/character
0 = font pointer offset 8 or 16 scanlines/character (depending on bit 1)
1 = font pointer offset 16 scanlines/character
0 = font pointer offset 8 scanlines/character
1 = 10 scanlines/character
0 = 8 or 13 scanlines/character (depending on bit 4 in register 0254 H)
025A H
Write
PRIO MODE
Bit
Reset
110
Function
5 to 3
2 to 0
prio code for shadow pixel
prio code for normal pixel
101
025B H
R/W
Reset
00 H
0
FB Mode
Bit
all
7
Write Function
Read Function
every read resets status
color bit 4(color output of OSD layer)
color bit 3(color output of OSD layer)
6
0
4
0
1 = inverted color output
0 = normal color output
Micronas
77
MICRONAS [ MICRONAS ]
