NM7010a shadow registers difficulties

gz · Joined: 04 May 2006 Posts: 1

Hello!

I am using NM7010a module in indirect mode. I tested my circuit with iftest program provided by Wiznet. All the tests were passed (writing/reading to all common registers, I could even ping the module), but sometimes test of pointer registers which are accessed via shadow registers failed. I focused to the shadow registers only and ran the test in the loop. There were 30 to 50 % of errors and the errors apeared randomly. I prolonged the delay after writing to the shadow register, but there was no improvement. I am also quite sure that errors apear when reading (I made the test with just one write and many readings - 30 to 50 % errors).

I am wondering, if someone had similar problem. I appreciate any help.

I didn't find any useful information on the Wiznet homepage, nevertheless some topics were opened regarding this problem. I have got a feedback from a NM7010a user who told me that this could be also a firmware problem in NM7010a module and suggested me to move to NM7010Bb, which doesn't have shadow registers.

Gregor