design for test 插入test point缺点
时间: 2023-08-28 22:05:58 浏览: 191
以下是在设计测试时插入 test point 的一些缺点:
1. 可能影响设计:在设计时插入 test point 可能会影响设计,因为需要考虑测试点的位置和数量,这可能会影响设计的性能和成本。
2. 会增加设计复杂性:插入 test point 可能会增加设计的复杂性,因为需要在设计中添加额外的电路或信号线路来实现测试点,这可能会增加设计的复杂性和难度。
3. 需要占用更多的空间:插入 test point 可能需要占用更多的空间,因为需要添加额外的电路或信号线路,这可能会导致芯片大小的增加,从而增加成本和复杂性。
4. 可能会影响性能:在设计中插入 test point 可能会影响性能,因为需要添加额外的电路或信号线路,这可能会引入噪声或延迟,从而影响芯片的性能。
5. 可能会增加测试成本:在设计中插入 test point 可能会增加测试成本,因为需要购买和维护额外的测试设备和测试工具,这可能会增加测试成本和时间。
相关问题
design for test 中的test point
在“设计用于测试(Design for Testability)”中,“测试点(Test Point)”指的是在电路或芯片设计中特别添加的电路元件或逻辑,以便在测试时可以轻松地检测电路的正确性和性能。测试点可以是硬件(如测试引脚或测试电路)或软件(如调试代码或调试接口)。
测试点的添加有助于提高测试覆盖率和测试效率,从而减少测试成本和加快产品上市时间。测试点的选择和设计需要考虑多个因素,如测试目的、测试技术、测试设备和成本等。
(The MyPoint class) Design a class named MyPoint to represent a point with x- and y-coordinates. The class contains: * The data fields x and y that represent the coordinates with getter methods. * A no-arg constructor that creates a point(0,0). * A constructor that constructs a point with specified coordinates. * A method named distance that returns the distance from this point to a specified point of the MyPoint type. * A method named distance that returns the distance form this point to another point with specified x- and y-corrdinates. Draw the UML diagram for the class and then implement the class. Write a test program that creates the two points(0,0) and (10,30.5) and displays the distance between them.
UML diagram:
```
_________________________
| MyPoint |
|-------------------------|
| -x: double |
| -y: double |
|-------------------------|
| +MyPoint() |
| +MyPoint(x: double, y: double) |
| +getX(): double |
| +getY(): double |
| +distance(point: MyPoint): double |
| +distance(x: double, y: double): double |
|_________________________|
```
MyPoint.java:
```java
public class MyPoint {
private double x;
private double y;
public MyPoint() {
this(0, 0);
}
public MyPoint(double x, double y) {
this.x = x;
this.y = y;
}
public double getX() {
return x;
}
public double getY() {
return y;
}
public double distance(MyPoint point) {
return distance(point.getX(), point.getY());
}
public double distance(double x, double y) {
double dx = this.x - x;
double dy = this.y - y;
return Math.sqrt(dx * dx + dy * dy);
}
}
```
TestMyPoint.java:
```java
public class TestMyPoint {
public static void main(String[] args) {
MyPoint p1 = new MyPoint();
MyPoint p2 = new MyPoint(10, 30.5);
System.out.println("Distance between (" + p1.getX() + ", " + p1.getY() +
") and (" + p2.getX() + ", " + p2.getY() + "): " + p1.distance(p2));
}
}
```
Output:
```
Distance between (0.0, 0.0) and (10.0, 30.5): 32.09750769140807
```
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