Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

RE: lack of address frame after reset


Draft D1.1 Clause 33 on P.92 said w.r.t. the address registers -
"At power up or device reset, the contents of the address register
are undefined."

After power-up or reset, for the case of an ill-behaved software
that does not specify at least one address frame first
before proceeding to a write or read operation, what should be
the response of a MMD?

I suppose for a write operation, the write will be simply ignored.
What about a read operation, should the MMD responds with a 0
(as if addressed to an undefined register) or no response at all
(as if the wrong port/device is addressed).

Can the spec. be more definitive on this point?