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Altera FPGA管脚弱上拉电阻的软件设置方法
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Altera FPGA管脚弱上拉电阻的软件设置方法
1.打开Assignments Editer
2.选择I/O features
3.查找需要上拉的端口
4.选择需要上拉的端口
5.选择上拉方式。
6.在value中选择ON，Enable选择YES.
7.保存然后再重新编译，设置完成。在.qsf中可以看到对应的端口已经上拉。
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to sw1_n
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to sw2_n
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to sw3_n
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