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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)： | 11/43頁 |
| 文件大?。?/td> | 604K |
| 代理商： | MAX7456 |
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M
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
______________________________________________________________________________________
11
Input Clamp
The MAX7456’s clamp is a DC-restore circuit that uses
the input coupling capacitor to correct any DC shift of
the input signal, on a line-by-line basis, such that the
sync tip at VIN is approximately 550mV. This establish-
es a DC level at VIN suitable for the on-chip sync
detection and video processing functions. This circuitry
also removes low-frequency noise such as 60Hz hum
or other additive low-frequency noise.
Sync Separator
The sync separator detects the composite sync pulses
on the video input and extracts the timing information to
generate
HSYNC
and
VSYNC
. It is also used for inter-
nal OSD synchronization and loss-of-sync (LOS) detec-
tion. LOS goes high if no sync signal is detected at VIN
for 32 consecutive lines, and goes low if 32 consecu-
tive horizontal sync signals are detected. During a LOS
condition, when VM0[5] = 0 (Video Mode 0 register, bit
5), only the OSD appears at the VOUT. At this time, the
input image is set to a gray level at VOUT as deter-
mined by VM1[6:4]. The behavior of all sync modes is
shown in Table 1.
COLOR BURST
SYNC TIP
LEVEL
BLACK LEVEL
WHITE LEVEL
MAXIMUM VIDEO SWING
INPUT VOLTAGE
MINIMUM VIDEO SWING
VIN
Figure 3. Definition of Terms
VIDEO MODE
VIN
Video
No input
Video
No input
Video
No input
VSYNC
Active
Active
Active
Inactive (high)
Active
Active
HSYNC
Active
Active
Active
Inactive (high)
Active
Active
LOS
Low
High
Low
High
High
High
VOUT
V
IN
+ OSD
OSD only
V
IN
+ OSD
DC
OSD only
OSD only
Auto Sync Select Mode
VM0[5, 4] = 0x
External Sync Select
VM0[5, 4] = 10
Internal Sync Select
VM0[5, 4] = 11
X = Don’t care.
Table 1. Video Sync Modes
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| MAX7462USA | Single-Channel Video Reconstruction Filters and Buffers |
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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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