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| 型號： | TVP3010-135 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Hardware Cursor, GAMMA Correction VIP(135MHz,高/寬光標，伽馬校正，視頻接口調(diào)色板) |
| 中文描述： | 硬件光標，伽瑪校正貴賓（135MHz，高/寬光標，伽馬校正，視頻接口調(diào)色板） |
| 文件頁數(shù)： | 89/100頁 |
| 文件大小： | 571K |
| 代理商： | TVP3010-135 |
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E–3
Cursor Position (x, y) Register
These registers are used to specify the (x,y) coordinate of the intersection of the cross hair cursor. They
are also used in conjunction with the Sprite Origin register to specify the location of the 64 x 64 cursor area
(see 2.5.3). The Cursor Position X register is made up of the Cursor Position X LSB (CPXL) and the Cursor
Position X MSB (CPXM); the Cursor Position Y register is made up of the Cursor Position Y LSB (CPYL)
and the Cursor Position Y MSB (CPYM). All registers are initialized to 00 (hex), and may be written to or
read from by the MPU at any time. The Cursor Position is not updated until the vertical retrace interval after
CPYM has been written to by the MPU.
CPXL and CPXM are cascaded to form a 12–bit Cursor Position X register. Similarly, CPYL and CPYM are
cascaded to form a 12–bit Cursor Position Y register. Bits D4–D7 of CPXM and CPYM are always a logical
zero.
Table J–3.
Cursor Position X MSB
Cursor Position X LSB
(CPXM)
(CPXL)
Data bit
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
X Address
0
0
0
0
11
10
9
8
7
6
5
4
3
2
1
0
Index = 01h
Index = 00h
Table J–4.
Cursor Position Y MSB
Cursor Position Y LSB
(CPYM)
(CPYL)
Data bit
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
Y Address
0
0
0
0
11
10
9
8
7
6
5
4
3
2
1
0
Index = 03h
Index = 02h
The Cursor Position X value to be written is calculated as follows:
Cx = desired display screen x position
Values from 0000 (hex) to 0fff (hex) may be written into the Cursor Position X register.
The Cursor Position Y value to be written is calculated as follows:
Cy = desired display screen y position
Values from 0000 (hex) to 0fff (hex) may be written into the Cursor Position Y register.
The values written into the Cursor Position X and Y registers should be relative to the first displayed pixel
on the screen; i.e. (0,0).
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