I have a problem with the memory test on my board. When I follow this document:
The test finished with at least one error because the error flag is set to '1'.
I'm using an ADV7842 and a SDR SDRAM ( IS42S16400J-6BL ) [1 Meg Bits x 16 Bits x 4 Banks (64-MBIT)].
My board seems to be ok, I checked the connexions more than twice...
I followed the instruction order from the document ( HW reset -> Document Instructions), it failed.
I tried with some more configuration before launching the test (HW reset -> I2C@ setting in main bloc -> "My instruction list" [details below] -> Document Instructions ).
In all cases, I checked the signals between the ADV and the SDRAM and the level of signal are ok.
Does anyone have an idea of why this test is'nt working?
"My instruction list" :
Write (SDP_IO, 0x75, 0xE6)
Write (SDP_IO, 0x74, 0x00)
Write (SDP_IO, 0x79, 0x33)
Write (SDP_IO, 0x60, 0x01)
Write (SDP_IO, 0x7A, 0xA5)
Write (SDP_IO, 0x7B, 0x8F)
Write (SDP_IO, 0x75, 0x01)