M37221M4H_15 Datasheet, PDF (58/114 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

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