UC知道电子专业英语翻译1
来源：百度知道 编辑：UC知道 时间：2024/05/29 12:15:36
The microcontroller IC is preprogrammed to provide each specific timer fuction. This not only reduces the component count but also allows us to provide more features than are possible using dedicated logic ICs. And the overall cost is much lower.
A 12MHz crystal(X1) on pins 4&5 provides a stable clock signal. This particular value was chosen because the microcontroller divides the crys-tal frequency by 12 to produce its own internal clock signal. This gives us an accurate 1μs timebase for elapsed time measurement.
The display is a 4-digit,commonanode,multiplexed, 7-segment display(LN5644). This means that all the LEDs in a single digit share a common anode(positive)connection. The cathodes(negative) of each segment are connected across the four digits,forming a matrix. This minimizes th number of pins needed to drive the display but requires a more complex nethod to do it.
Multiplexing is a technique where-by each digit is turned on in sequence and then only for a
A 12MHz crystal(X1) on pins 4&5 provides a stable clock signal. This particular value was chosen because the microcontroller divides the crys-tal frequency by 12 to produce its own internal clock signal. This gives us an accurate 1μs timebase for elapsed time measurement.
The display is a 4-digit,commonanode,multiplexed, 7-segment display(LN5644). This means that all the LEDs in a single digit share a common anode(positive)connection. The cathodes(negative) of each segment are connected across the four digits,forming a matrix. This minimizes th number of pins needed to drive the display but requires a more complex nethod to do it.
Multiplexing is a technique where-by each digit is turned on in sequence and then only for a
前三段的：
微控制器芯片已预先编程来提供各种特定的时序功能。这不仅减少了元件数量，也允许我们提供比逻辑器件可能用的功能还要多的功能。并且总体花费也减少许多。
一个12兆赫兹管脚4*5的晶振提供了稳定的时钟信号。这种特性被选择，因为微控制器将晶振频率按12分频来产生其自身的固定时钟信号。这给我们一个准确的1微秒的时间基础来计算时间。
显示是四位的复用七段显示器。这意味着在一个单位中所有的led有着共同的阳极连接。每个元件的负极连接着这四位，形成一个阵列。这使得驱动显示器所需管脚的数目最小化，但要求一个更复杂的方法来实现。
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