最新免费av在线观看,亚洲综合一区成人在线,中文字幕精品无码一区二区三区,中文人妻av高清一区二区,中文字幕乱偷无码av先锋

LM1882CN Datasheet

  • LM1882CN

  • National Semiconductor [Programmable Video Sync Generator]

  • 343.10KB

  • NSC

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書(shū)

PDF預(yù)覽

Capacitance
(Continued)
DS100232-6
FIGURE 5. AC Specifications
Additional Applications Information
POWERING UP
The 鈥橝CT715/LM1882 default value for Bit 10 of the Status
Register is 0. This means that when the CLEAR pulse is ap-
plied and the registers are initialized by loading the default
values the CLOCK is disabled. Before operation can begin,
Bit 10 must be changed to a 1 to enable CLOCK. If the de-
fault values are needed (no other programming is required)
then
Figure 6
illustrates a hardwired solution to facilitate the
enabling of the CLOCK after power-up. Should control sig-
nals be difficult to obtain,
Figure 7
illustrates a possible solu-
tion to automatically enable the CLOCK upon power-up. Use
of the 鈥橝CT715-R/LM1882-R eliminates the need for most of
this circuitry. Modifications of the
Figure 7
circuit can be
made to obtain the lone CLEAR pulse still needed upon
power-up.
Note that, although during a Vectored Restart none of the
preprogrammed registers are affected, some signals are af-
fected for the duration of one frame only. These signals are
the Horizontal and Vertical Drive signals. After a Vectored
Restart the beginning of these signals will occur at the first
CLK. The end of the signals will occur as programmed. At
the completion of the first frame, the signals will resume to
their programmed start and end time.
PREPROGRAMMING 鈥淥N-THE-FLY鈥?/div>
Although the 鈥橝CT715/LM1882 and 鈥橝CT715-R/LM1882-R
are completely programmable, certain limitations must be
set as to when and how the parts can be reprogrammed.
Care must be taken when reprogramming any End Time reg-
isters to a new value that is lower than the current value.
Should the reprogramming occur when the counters are at a
count after the new value but before the old value, then the
counters will continue to count up to 4096 before rolling over.
For this reason one of the following two precautions are rec-
ommended when reprogramming 鈥渙n-the-fly鈥? The first rec-
ommendation is to reprogram horizontal values during the
horizontal blank interval only and/or vertical values during
the vertical blank interval only. Since this would require deli-
cate timing requirements the second recommendation may
be more appropriate.
The second recommendation is to program a Vectored Re-
start as the final step of reprogramming. This will ensure that
all registers are set to the newly programmed values and
that all counters restart at the first CLK position. This will
avoid overrunning the counter end times and will maintain
the video integrity.
11
www.national.com

LM1882CN相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    泰豐
  • 英文版
    Seoul Semiconductor [BLUE OVAL LAMP LED]
    SEOUL
  • 英文版
    Adjustable Micropower Voltage References
    NSC
  • 英文版
    Adjustable Micropower Voltage References
  • 英文版
    National Semiconductor [LM1800 Phase-Locked Loop FM Stereo ...
    NSC
  • 英文版
    National Semiconductor [BATTERY OPERATED POWER COMPARATOR]
    NSC
  • 英文版
    Seoul Semiconductor [GREEN OVAL LAMP LED]
    SEOUL
  • 英文版
    ULTRASONIC TRANSCEIVER
    NSC
  • 英文版
    ULTRASONIC TRANSCEIVER
    NSC [National S...
  • 英文版
    Adaptive Variable Reluctance Sensor Amplifier
    NSC
  • 英文版
    Adaptive Variable Reluctance Sensor Amplifier
  • 英文版
    National Semiconductor [Electronically Switched Audio Tape ...
    NSC
  • 英文版
    National Semiconductor [Air-Core Meter Driver]
    NSC
  • 英文版
    VIDEO IF AMPLIFIER/PLL DETECTOR SYSTEM
    NSC
  • 英文版
    A High Quality TV Video I.F. Amplifier and Synchronous Detec...
    National Semiconductor
  • 英文版
    Fluid Detector
    NSC
  • 英文版
    Fluid Detector
    NSC [National S...
  • 英文版
    National Semiconductor [Low Noise PREAMPLIFIER FOR AUTOREVE...
    NSC
  • 英文版
    Ground Fault Interrupter
    NSC
  • 英文版
    GROUND FAULT INTERRUPTER
    UTC-IC

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買(mǎi)家服務(wù)：
賣(mài)家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見(jiàn)，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見(jiàn)一經(jīng)采納，將有感恩紅包奉上哦！