M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
Clock for OSD
HSYNC VSYNC
OSC1 OSC2
Display
oscillation
circuit
Control registers for OSD
OSD Control circuit
Horizontal position register (address 00E016)
Vertical position register
Character size register
Color register
OSD control register
OSD port control register
(addresses 00E116, 00E216)
(addresses 00E416)
(addresses 00E616 to 00E916)
(address 00EA16)
(address 00EC16)
OSD clock selection register (address 00ED16)
OSD RAM
10 bits ✕ 24 characters ✕ 2 lines
OSD ROM
12 dots ✕ 16 dots ✕ 256 characters
Shift register
12-bit
Output circuit
Shift register
12-bit
R
G
B
OUT1
OUT2
Data bus
Fig. 8.11.2 Block Diagram of OSD Circuit
Rev.1.00 Oct 01, 2002 page 56 of 110
REJ03B0134-0100Z