Tegra2 GMI SNOR trouble

I want to use the GMI interface multiplexed 16-bits asynchronous mode.

I have difficulty with sequences of read / write on the bus.

The problem is that sometimes the GMI_OE_N signal appears before GMI_ADV_N signal, which is not normal.

Can you help me?

thank you

there is a erratas document for tegra2 cpu?