本帖最后由 hm_315 于 2014-3-9 10:38 编辑
小弟现在在做一些PLD关于GAL20V8的实验,做的是一个全加器,按照FM软件的格式写的程序ADD.PLD如下:
- GAL20V8
- Full Adder
- 1 2 3 4 5 6 7 8 9 10 11 12
- 13 14 15 16 17 18 19 20 21 22 23 24
- NC Xn Yn Cn-1 NC NC NC NC NC NC NC GND
- NC NC Fn Cn NC NC NC NC NC NC NC VCC
- Fn=Xn*/Yn*/Cn-1+/Xn*Yn*/Cn-1+/Xn*/Yn*Cn-1+Xn*Yn*Cn-1
- Cn=Xn*Yn+Xn* Cn-1+Yn* Cn-1
- DESCRIPTION
复制代码然后编译得到的ADD.JED熔丝文件如下所示:
- *L0
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0111011111111111111111111111111111111111
- 0111111101111111111111111111111111111111
- 1111011101111111111111111111111111111111
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0111101110111111111111111111111111111111
- 1011011110111111111111111111111111111111
- 1011101101111111111111111111111111111111
- 0111011101111111111111111111111111111111
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000
- 00000011
- *L2632
- 11111100111111111111111111111111111111111111111111111111111111111111111110
- *F8CC
复制代码
通过查看GAL20V8 的手册,然后查看JED文件内容,第50行代码:
- 0111011111111111111111111111111111111111
复制代码的作用是Pinx= !(Pin2 & Pin3);
那这行代码中全为1的部分,如果全部替代为0,作用是一样的吗?
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