TMS320F28377D: SDRAM and FPGA supported at the same time

Jordan Zhou

Genius 10470 points

Part Number: TMS320F28377D

Hi,

Customer asked, if SDRAM and FPGA can be supported on ONE EMIF, on F28377D.

In their original F28335 platform, FPGA was connected by EMIF. SDRAM was connected to FPGA.

Now, they'd like to connect SDRAM and FPGA to F28377D together, on one EMIF port.

Thanks.

Br, Jordan

over 8 years ago

0 Vivek Singh over 8 years ago

TI__Guru** 117311 points

Hi Jordan,

Customer asked, if SDRAM and FPGA can be supported on ONE EMIF, on F28377D.

Yes, EMIF module on this device have specific chip selects for SDRAM interface (CS0) and ASYNC interface (CS3/CS4/CS5) so they can connect multiple device to same one EMIF.

Please refer this appnote for more info.

Regards,

Vivek Singh

0 Jordan Zhou over 8 years ago in reply to Vivek Singh

TI__Genius 10470 points

Hi,
Another issue about the size of SDRAM and FPGA.
Customer would like to connect to 4M words SDRAM and FPGA (connected to 64K words RAM). EM1A13, EM1A14, EM1A15 and EM1A16 will be used. But these pins are muxed for SDRAM and FPGA control lines.
How can we do?
176pin LQFP package is chosen by customer.
Thanks in advance.
Br, Jordan

0 Jordan Zhou over 8 years ago in reply to Jordan Zhou

TI__Genius 10470 points

0 Vivek Singh over 8 years ago in reply to Jordan Zhou

TI__Guru** 117311 points

Hi Jordan,

That is going to be an issue. When using both SDRAM and ASRAM, only A0 to A12 is available for ASRAM accesses. Since he is using it for FPGA, I am assuming it's not for code so he could try using some GPIO pins for higher address lines for ASRAM and drive them via SW.

Regards,

Vivek Singh

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28377D: SDRAM and FPGA supported at the same time