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參數資料
型號: HMS81C43XX
廠商: Hynix Semiconductor Inc.
英文描述: CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR TELEVISION
中文描述: CMOS單芯片8位單片機電視
文件頁數: 54/100頁
文件大小: 1943K
代理商: HMS81C43XX
HMS81C43xx / GMS87C4060
54
November 2001 ver 1.2
17. On Screen Display (OSD)
The On Screen Display circuit is shown in Figure 17-1 .
The HMS81C43xx/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.
Figure 17-1 Block Diagram of On Screen Display circuit
L1ATTR [AF0
H
]
OSD Control
Circuit
OSDLN [AE5
H
]
OSDCON1 [AE0
H
]
OSDCON2 [AE1
H
]
SPVPOS [AE8
H
]
OSDPOL [AE2
H
]
Line 1,2 Attribute,
Position register
Line register
Full screen control
register
Sprite position register
I/O polarity register
Sprite control register
L1VPOS [AF1
H
]
L2ATTR [AF3
H
]
L2VPOS [AF4
H
]
SPHPOS [AE9
H
]
LHPOS [AE6
H
]
Horizontal position register
FDWSET [AE3
H
]
Field detection register
EDGECOL [AE4
H
]
Edge color register
VRAM
Font ROM
Sprite Control
Circuit
Sprite RAM
OSD, Sprite Generation Circuit
Sprite Control
Circuit
Output
Control
Circuit
Synchronization
Circuit
HSYNC
VSYNC
OSC1
OSC2
R
G
B
I
YS
YM
Color Mode Register
COLMOD [0AEF
H
]
Mesh Control Register
MESHCON [0AEB
H
]
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參數描述
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