i.MX RT Crossover MCUsのトピックRe: Difference between IP Command and AIX Command

Difference between IP Command and AIX Command

toandang — Fri, 20 Jul 2018 08:52:26 GMT

Hi All,

Currently, I am working on the i.MX RT1050 Processor. I see that the processor supports two command modes for NAND device: IP Command and AXI Command.

I would like to ask what are the difference between the two above modes.

Thanks and Regards,

Re: Difference between IP Command and AIX Command

Yuri — Mon, 23 Jul 2018 08:10:38 GMT

Hello,

Please refer to sections 49.4.4 (Device access by AXI Command) and 49.4.5 (Device access

by IP Command) of i.MX RT1050 Reference Manual, Rev. 1, 03/2018, for some details.

Commands, concerned with data transfer to / from (internal) device address area from / to system

memory (DMA) are considered as AXI command in contrast to commands, concerned with controller

settings and access to controller address area.

Have a great day,
Yuri

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Re: Difference between IP Command and AIX Command

hansonhe — Tue, 31 Jul 2018 13:35:14 GMT

Yuri,

I have one question about AXI Command application as below. Could you also help check it? Thanks.

A AXI Command write instruction operation will actually emit four write operating waveforms, and all the four write operation addresses are 4 byte aligned, and all are increased from the relative address 0 to the relative address 3.

The same procedure is tested by IP Command instruction without any of the above problems. The waveform is also normal.

Re: Difference between IP Command and AIX Command

Yuri — Wed, 01 Aug 2018 03:50:51 GMT

Hello,

NAND is such device, which does not have (storage memory) address area, accessible via

AXI commands. IMX RT NAND interface only supports page based read/write IP operations.

Regards,

Yuri.