TMS570LC4357: EMIF 16 bit access to NOR Flash

Sandeep B

Part Number: TMS570LC4357

Tool/software:

Dear Sir/Madam,

The EMIF 16 bit data bus is connected to NOR Flash in my design.

Microcontroller is sending address 0xAAA and data 0x1234 but on EMIF interface address is 0x555 and data 0x3412 is coming.

Is there any setting to be done on microcontroller side to see same address and data on EMIF bus?

Regards,

B Sandeep.

4 months ago

0 jagadish gundavarapu 4 months ago

TI__Guru 70681 points

Hi Sandeep,

Can you please share your code once? And also, if possible share your connectivity diagram between NOR flash and controller as well?

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Thanks & regards,
Jagadish.

0 Sandeep B 4 months ago in reply to jagadish gundavarapu

Prodigy 200 points

Please find the attached for the schematic connections.

Flash A0 is connected to the microcontroller's BA1, while flash [A21:1] is connected to the microcontroller's [A20:0]. simple code is written in the micro controller and probed in the FPGA, the observations are shared in previous post.

Regards,

B Sandeep.

0 jagadish gundavarapu 4 months ago in reply to Sandeep B

TI__Guru 70681 points

Hi sandeep,

I am unable to access the schematic link you shared!

Plese also share the code.

--
Thanks & regards,
Jagadish.

0 Sandeep B 4 months ago in reply to jagadish gundavarapu

Prodigy 200 points

Hi Jagadish,

I will share code in sometime as the code is with software team. I want to know how microcontroller responds to address and data write to EMIF interface in case of 16 bit data. The TRM provides only connection point of view, there is no figure supporting the write/read transaction for NOR flash. Please provide data on the same.

Regards,

B Sandeep.

0 jagadish gundavarapu 4 months ago in reply to Sandeep B

TI__Guru 70681 points

Hi Sandeep,

Please refer below thread once:

(16) TMS570LC4357-EP: EMIF concept - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

Here i explained in detail how the accessing happening in 16-bit memory interface in detailed.

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Thanks & regards,
Jagadish.