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Use different RAM on ADSP-21569

V0lt4
on Jun 4, 2020

Hi,

We are designing an audio system (firmware and board) that use ADSP-21569.

The firmware is based on SigmaStudioForSHARC-SH-Rel4.5.0 Target demo for 21569.

For hardware design I used ADZS-21569-EZ-KIT as a reference.
This eval board use an 8Gb DDR3 (part number IS43TR16512BL-125KBL.)

Since we don't need such a huge ram, we would like to replace it with a smaller memory like the one that Analog use in the ADZS-SC589-MINI.
The part number is:  MT41K128M16JT-125  and seems to be pin-to-pin compatible.

My question is:
- is this RAM p/n usable with ADSP-21569?
- what modifications are needed in firmware for correctly initialize the DSP and the system with this ram (Reference firmware is in "SigmaStudioForSHARC-SH-Rel4.5.0\Target\Examples\Demo\ADSP-2156x\ADSP-21569" )

I hope that there is a way to configure this RAM because in a few days we will receive first board samples and 2 of 8 boards are assembled with this part number.

Thanks in advance for the support

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    •  Analog Employees 
    on Feb 24, 2021 10:21 AM in reply to V0lt4

    Hi,

    Sorry for the delayed response.

    Regarding,"- is this RAM p/n usable with ADSP-21569?"
    >> Yes it seems IS43TR16512BL-125KBL is similar to MT41K128M16JT-125 except 96-FBGA (8x14) of Supplier Device Package , -40°C ~ 95°C (TC)  of Operating Temperature  in MT41K128M16JT. Whereas IS43TR16512BL is having 96-TWBGA (10x14)  & 0°C ~ 95°C (TC).

    Regarding," what modifications are needed in firmware for correctly initialize the DSP and the system with this ram (Reference firmware is in "SigmaStudioForSHARC-SH-Rel4.5.0\Target\Examples\Demo\ADSP-2156x\ADSP-21569" )"
    >> We suggest you to refer the EE-418 application note which talks about ADSP-2156x Board Design Guidelines for Dynamic Memory Controller.

    All the Sigma Studio related questions are handled in the Engineer Zone. So, please post your question in the EZONE community.
    ez.analog.com/.../sigmadsp

    Regards,
    Anand Selvaraj.