Glueless interface of SDRAM with MPC8270

[toltol]

Hi i am using 12 SDRAMs with my MPC8270 and it says that it uses glues-less interface of SDRAM and other peripherals. 

Because of 12 SDRAM i am not able to do use my bus at 100Mhz because of signal integrity issues. As load is too high and 60x bus is not able to drive the SDRAM.

So can i use buffers in between SDRAM and PowerPC MPC8270?

I am confused because it says glue less interface, so is glue less interface must or optional?

[alexander_yakov]

Sorry for delayed response to this topic.

No, glue-less interface is not must. Moreover, external buffers are explicitly mentioned as supported - timing of all SDRAM control lines (except CS) may be changed accordingly. Please look MPC8280 Reference Manual, Table 11-8, the description of PSDMR[BUFCMD] field.

Note that CS line can not be buffered.

Have a great day,
Alexander
TIC

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