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參數(shù)資料
| 型號： | MAX7456 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Single-Channel Monochrome On-Screen Display with Integrated EEPROM |
| 中文描述： | 集成了EEPROM的單通道、單色隨屏顯示器 |
| 文件頁數(shù)： | 12/43頁 |
| 文件大小： | 604K |
| 代理商： | MAX7456 |
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M
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
12
______________________________________________________________________________________
Video Timing Generator
The video timing generator is a digital circuit generat-
ing all internal and external (
VSYNC
and
HSYNC
) tim-
ing signals.
VSYNC
and
HSYNC
can be synchronized
to VIN, or run independently of any input when in inter-
nal sync mode. The video timing generator can gener-
ate NTSC or PAL timing using the same 27MHz crystal
(see Figures 4–9).
Crystal Oscillator
The internal crystal oscillator generates the system
clock used by the video timing generator. The oscillator
uses a 27MHz crystal or can be driven by an external
27MHz TTL clock at CLKIN. For external clock mode,
connect the 27MHz TTL input clock to CLKIN and leave
XFB unconnected.
Display Memory (SRAM)
The display memory stores 480 character addresses
that point to the characters stored in the NVM character
memory. The content of the display memory is user-
programmable through the SPI-compatible serial inter-
face. The display-memory address corresponds to a
fixed location on a monitor (see Figure 10). Momentary
breakup of the OSD image can be prevented by writing
to the display memory during the vertical blanking inter-
val. This can be achieved by using
VSYNC
as an inter-
rupt to the host processor to initiate writing to the
display memory.
t
VOUT-VSF
1/2H
VERTICAL SYNCHRONIZATION
PULSE INTERVAL
VOUT
(ODD FIELD)
VOUT
(EVEN FIELD)
VSYNC
HSYNC
(ODD FIELD)
HSYNC
(EVEN FIELD)
50%
50%
t
VOUT-VSR
50%
50%
50%
Figure 4. VOUT,
VSYNC
, and
HSYNC
Timing (NTSC, External Sync Mode)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7456EUI/GH9 | 制造商:Maxim Integrated Products 功能描述:SINGLE-CHANNEL MONOCHROME ON-SCREEN DISPLAY - Rail/Tube |
| MAX7456EUI+ | 功能描述:視頻 IC Monochrome On Scrn Display Generator RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX7456EUI+T | 功能描述:視頻 IC Monochrome On Scrn Display Generator RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX7456EUI+W | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX7456EVKIT | 功能描述:顯示開發(fā)工具 RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評估:?OLED-160-G1, ?OLED-160-G2 接口類型:Serial 工作電源電壓:5 V |
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