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From: johnp at probo.com<johnp@p...>
Date: Fri Jan 13 22:21:27 CET 2006
Subject: [usb] USB 2.0 core and phy_SuspendM_pad_o signal
I believe the logic for creating the signal phy_SuspendM_pad_o
is incorrect. The UTMI spec states that this signal is driven LOW
to put the transceiver into suspend mode.

The original code is:
assign SuspendM = (usb_suspend & !resume_req_s) | (LineState == 2'b10);

In looking at simulations, I see SuspendM changing state unexpectedly.

I believe the correct code should be:
assign SuspendM = ~(usb_suspend & !resume_req_s) | (LineState == 2'b10);

John Providenza