中鼎股份rcio

⑴ stc89c52rc单片机io输入多大电压认为是高电平

高电平>2.4V,输出低电平<0.4V。在室温下，一般输出高电平是3.5V，输出低电平是0.2V。最小输入高电平和低电平：输入高电平>=2.0V，输入低电平<=0.8V，噪声容限是0.4V。

⑵ 当某信号要进入到单片机的IO口都会先经过一个RC组成的电路，这个是RC滤波电路吧，那么RC值如何选取呢

具体信号 具体分析
让RC电路截止频率略高于有效信号的频率
另外最好RC电路的输出阻抗最好等于 输入阻抗

⑶ cocos2dx3.0rc SocketIO是个什么东东

300 varints 编码为：1010 1100 0000 0010 解释如下： 300的2进制编码为：0001 0010 1100 按照刚才的规则，高低位颠倒，截取最后的7为放在第一个byte，则第一byte为1010 1100（其中最高位1表示，后续还有byte）；接着剩下的内容放到第二个byte

⑷ 如何使用外部模块改变STC89C52RC的IO引脚电平

你用的是定时器1，模式1（16位定时/计数），如果单片机用的是12MHz或11.0592MHz的晶振，则机器周期为1us，那么每隔200us，CLK翻转1次，CLK周期为400us

⑸ Tiago Iorc的《Scared》 歌词

歌曲名:Scared
歌手:Tiago Iorc
专辑:Let Yourself In

Tiago Iorc - Scared
Standing outside, looking out for me
I know I've done nothing wrong
There's plenty of time for us to see
Start cleaning up the mess we've done
We keep on living our lives
with stupidity
As if we've got something to lose
So much selfish tranquility
Just for the sake
of trying nothing new
And I Think I
Should be the one
to make a stand,
because
Everybody is scared (4x)
Everybody is scared sometimes (2x)
Time goes by and it seems to me
It's easy just to come and go
Well, turns out nothing comes for free
Our children live the seeds we sow
Pretend now
The fire burned out,
now it's you and me
Still we've got nothing to lose
So much selfish tranquility
Just for the sake
of trying nothing new
And I Think I
Should be the one
to make a stand, because
Everybody is scared (4x)
Everybody is scared sometimes (2x)
Every time I close my eyes
This pain is killing me
And I try to take it down
Put my feet back on the ground
Just to know you're still with me
Just remember girl
Although it's easier to say goodbye
Feels like a bullet in my heart
To know we're throwing away the good times, because
Everybody is scared sometimes (2x)
Sometimes (3x)

http://music..com/song/24491526

⑹ stc89c52rc单片机。io口接无源蜂鸣器负极，无源蜂鸣器正极接五伏电源，程序写的是io口产生

单片机IO口驱动能力不是很大，直接驱动蜂鸣器有点难度，最好加个三极管驱动。

⑺ STC89C52RC单片机的IO口与nRF905连接

905供电要是3.3V的 连接52时只要控制电流不超过10MA就可以 超过的话烧毁905芯片 加上串联电阻可以解决
905采用的是SPI接口，52没有SPI接口，需要用程序模拟

⑻ STC89C52RC单片机的IO口与nRF905连接

这个无线模块我也用过，可以和STC单片机IO口连接，但是中间要串联一个1K电阻！防止电流过大使无线模块损坏！给你个图片参考一下！