Hi,
I'm doing several single write accesses to the OMAP4460 GPMC port, and I see very long delays between two successive write transactions. Using an oscilloscope I measure a write-to-write delay around 150ns, but I can't explain where that delays come from since I set all the CYCLE2CYCLE delay parameters to zero in GPMC CONFIG6 register.
I observe the same delay both in synchronous and asynchronous mode, and for both NAND or NOR device type. I know for sure that the delay doesn't come from the CPU because I'm just running a simple loop and the execution is much faster that that.
Does anyone know where this delay come from and how can I reduce it?
See my GPMC config values below;
CONFIG1 0x3A001001
CONFIG2 0x00020200
CONFIG3 0x00000000
CONFIG4 0x02000A02
CONFIG5 0x0209020C
CONFIG6 0x01000000
Thank you.