TMS320F28375S: About mapping from logical address to "EMIF2" pins for 16-bit SDRAM

Uchida-san,

1.Is it correct to confirm the table 24-15,page 2302, in the technical reference manual when I use EMIF2?

This is generic information about EMIF IP so yes it applies to EMIF2 as well as EMIF1.

2.Is it possible to access the address space described in the table 24-15,page 2302, in the technical reference manual when I use EMIF2?

As mentioned this is generic info about EMIF module and number of address lines will be different for different EMIF instance based on pinmux setting and total valid address lines.

About table 24-15,page 2302, in the technical reference manual, it seems to described Row Address as 13bit.

   But TMS320F28375s has only 12 EM2A pins according to the device specific datasheet.

Would you give me any advises?

Yes, EMIF2 has only 12 address lines and EMIF1 has 13. Available address space for each EMIF will change based on number of address lines.

Regards,

Vivek Singh

Hi Vivek Singh,

Thank you for your reply.

>Yes, EMIF2 has only 12 address lines and EMIF1 has 13. Available address space for each EMIF will change based on number of address lines.

If so, the value of EMIF2_CS0n - Data SIZE in Table 6-4 in the F28375S's data sheet is 32M x 16, isn't it?

2^12(row) * 2^11(col) * 4(bank) = 32M

I think EMIF2 can't access 64M addresses because it has only 25 bits.

Regards,

uchida-k