MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Clock for OSD
OSC1 OSC2
HSYNC VSYNC
Display
oscillation
circuit
Data slicer clock
Control registers for OSD
OSD Control circuit
(address 00CE16)
(address 00CF16)
(addresses 00D016 to 00DF16)
(address 021616)
(address 021716)
(address 021816)
(address 021916)
(address 021B16)
(addresses 021C16 to 021F16)
(addresses 022016 to 023F16)
OSD control register
Horizontal position register
Block control registers
Clock source control register
I/O polarity control register
Raster color register
Extra font color register
Border color register
Window H/L registers
Vertical registers
RAM for OSD
20-bit✕40✕16
RAM for OSD
(16-bit✕ 20✕ 320) +
16-bit✕26✕32)
Shift register 1
16-bit
Output circuit
Shift register 2
16-bit
R
G
B
I1
I2
OUT1 OUT2
Data bus
Fig. 48. Block diagram of OSD control circuit
46
RENESAS [ RENESAS TECHNOLOGY CORP ]
