DDR DRAM mode register address bits

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DDR DRAM mode register address bits

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dallasclow
Contributor II

Are the bank address bits of the mode register settings (two msb's) of each field in DDR_SDRAM_MODE and DDR_SDRAM_MODE_2 used by the DDR controller at initialization or are they ignored?  There is a separate field for each specific mode register, which should allow the bank address bits to be ignored when addressing the DRAMs.  We're trying to assess the impact of a SW bug that incorrectly set the two msb's of the ESDMODE, ESDMODE2, and ESDMODE3 fields.  Would these to bits be ignored or cause incorrect DRAM mode register writes?

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ufedor
NXP Employee
NXP Employee

> Would these to bits be ignored or cause incorrect DRAM mode register writes?

These bits are ignored.

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dallasclow
Contributor II

This is an MPC8610.

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ufedor
NXP Employee
NXP Employee

> Would these to bits be ignored or cause incorrect DRAM mode register writes?

These bits are ignored.

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ufedor
NXP Employee
NXP Employee

Which processor is in question?

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