AnsweredAssumed Answered

Interface MPC860 with Micron SDRAM [MT48LC8M16A2TG]

Question asked by balaji govindarajan on Feb 17, 2014
Latest reply on Feb 22, 2014 by alexander.yakovlev

Dear All,

 

         I am using the processor MPC860 and interface with SDRAM [8MB]. Using external clock[66MHz],  the initialization for SDRAM and chip select CS1.

 

writemmr BR00xFFF00001 # BR0 - Boot Flash starts at 0xFFF00000
writemmr OR00xFFF00074 # OR0 - SIZE OF THE BOOT FLASH IS 1MBYTE

 

 

writemmr BR10x00000081 # BR1 - SDRAM starts at 0x00000000
writemmr OR10xFF000800 # OR1 - SIZE OF THE SRAM IS 16MBYTEs

 

 

#writemmr BR70x00000801 # BR2 - ram starts at 0x20000401
#writemmr OR70xFFF00074

 

 

I commented BR7 and OR7 for RAM functionality and enable the SDRAM. Load the configure file for erase and programming. when try to erase the flash, only chip select 1 signal is correct. other than that SD_WE#, OE# signals are tri-state. I don't know why it is coming like that? Bank Select configured for A7 and A8.

Can you check it and mail me?         I am eager to waiting for your reply.

 

 

 

 

 

Thanking you,

Regards

Balaji

Outcomes