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參數(shù)資料
| 型號(hào)： | Z9025900ZEM |
| 英文描述： | SCR Thyristor; SCR Type:Standard Gate; Peak Repetitive Off-State Voltage, Vdrm:600V; On-State RMS Current, IT(rms):35A; Peak Non Repetitive Surge Current, Itsm:500A; Gate Trigger Current Max, Igt:40uA |
| 中文描述： | 消費(fèi)性IC |
| 文件頁數(shù)： | 23/30頁 |
| 文件大小： | 938K |
| 代理商： | Z9025900ZEM |
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Z90255 ROM and Z90251 OTP
32 KB Television Controller with OSD
PS001300-TVC1099
Preliminary
23
3
ON-SCREEN DISPLAY
The On-Screen Display (
OSD
) module generates and displays a 10 row by 24 columns of
512 characters at 14 x 18-dots resolution. The color of each character can be specified
independently.
The televison OSD controller uses
H
SYNC
and V
SYNC
signals to synchronize its internal
circuitry to the video signal, then outputs RGB and Video Blank (
VBLANK
) signals. The
VBLANK
signal is used to multiplex the OSD signal and video signal onto the screen. The
result is that the On-Screen Display is superimposed over the TV picture.
The display results from the successful timing of several components:
OSD Positioning
Second Color Feature
Mesh and Halftone Effect
OSD Fade
Inter-Row Spacing
Character Generation
3.1 OSD Position
OSD Positioning is controlled by programming the following registers:
OSD Control Register (Table 5)
Vertical Position Register (Table 6)
Horizontal Position Register (Table 7)
OSD Control Register
Table 5
OSD Control Register 00h:Bank A (OSD_CNTL)
Bit
7
6
5
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
x
x
x
x
x
x
x
N
OTE
:
R = Read W = Write X = Indeterminate
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