GMS87C4060 Datasheet, PDF (57/102 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

PRELIMINARY
GMS81C4040/87C4060
17. On Screen Display (OSD)
The On Screen Display circuit is shown in Figure 17-1 .
The GMS81C4040/GMS87C4060 can support 512 OSD
chacters, but the last 6 characters (number 506 ~ 511,
1FA_H ~ 1FF_H) are reserved for IC test and its pattern is
fixed by manufacturer. So you can use 506 characters for
your own.
The OSD circuit consists of the Position attribute register,
Line register, Full screen screen control register, sprite
control register, sprite position reigster, I/O polarity regis-
ter, sprite RAM, font ROM, VRAM, etc. The more details
about registers are shown Figure 17-2.
Line 1,2 Attribute,
Position register
L1ATTR [AF0_H]
L1VPOS [AF1_H]
L2ATTR [AF3_H]
L2VPOS [AF4_H]
OSD Control
Circuit
Line register
OSDLN [AE5_H]
Full screen control
register
OSDCON1 [AE0_H]
Horizontal position register
LHPOS [AE6_H]
Sprite control register
OSDCON2 [AE1_H]
Sprite position register I/O polarity register
SPVPOS [AE8_H]
OSDPOL [AE2_H]
Field detection register
FDWSET [AE3_H]
SPHPOS [AE9_H]
Edge color register
EDGECOL [AE4_H]
Color Mode Register
COLMOD [0AEF_H]
Mesh Control Register
MESHCON [0AEB_H]
Sprite Control
Circuit
VRAM
Font ROM
HSYNC
VSYNC
OSC1
OSC2
OSD, Sprite Generation Circuit
Synchronization
Circuit
Sprite RAM
Sprite Control
Circuit
R
G
Output
B
Control
Circuit
I
YS
YM
Figure 17-1 Block Diagram of On Screen Display circuit
Nov. 1999 Ver 1.0
PRELIMINARY
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