topic Re: 关于i.mxRT600 in i.MX RT Crossover MCUs

关于i.mxRT600

mycan12345 — Thu, 12 Mar 2020 09:52:59 GMT

您好

1，最近看到rt600有密码加速器（Cryptographic Accelerator (CASPER)），发现密码加速器中有乘法器和加法器，请问一下这些算术加速器是有符号运算还是无符号运算的，例如乘法器是有符号乘法器还是无符号乘法器

2，还要rt600的powerquad中关于IIR的运算精度需要怎么计算，如下图res和ref分别代表什么？？

Re: 关于i.mxRT600

jeremyzhou — Mon, 16 Mar 2020 06:23:12 GMT

非常感谢使用NXP产品，很高兴为你提供技术支持！

1) 例如乘法器是有符号乘法器还是无符号乘法器?

-- 无符号。

2) 还要rt600的powerquad中关于IIR的运算精度需要怎么计算，如下图res和ref分别代表什么？？

-- Res: 实际得出的值，Ref: 标准值（或者理论值）

Have a great day,
TIC
 
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Re: 关于i.mxRT600

mycan12345 — Mon, 16 Mar 2020 09:23:53 GMT

不太明白关于powerquad iir精度的计算，是否可以举个计算的实例，这个理论值和实际值是否和int32，int16，fp有关？？

Re: 关于i.mxRT600

jeremyzhou — Wed, 18 Mar 2020 10:55:34 GMT

Hi ,

IIR滤波器的性能评价指标（如SNR:信噪比），说实话，我们也不是很了解，建议你自己去参考数字信号处理相关的书籍。

在SDK中也有PowerQuad关于IIR的测试代码，你也可以运行测试一下。

Have a great day,
TIC
 
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