HBM PX401, Руководство по эксплуатации

Страница: 502 / 552

Object directory
502
A4354-2.2 HBM: public
PMX
22.5.3.1 Reply to a Read Request
PMX copies the index, subindex, the control flags, and
the requested value into the reply.
The request has been served successful, when bits
32..63 of the reply equal bits 32..63 of the request. Then
bits 0..31 contain the requested value.
Don't evaluate the value when one of the error flags is
set.
22.5.3.2 Reply to a Write Request
PMX copies all data from the request into the reply.
The request has been served successful, when all bits of
the reply equals the request.
22.5.3.3 Retry
For retrying a failed request, at minimum one bit of the
request must change. Generally, PMX waits for changes
in the request.
Example:
For retrying a read request, toggle the read control bit (bit
63)
1. Set read control bit = 0
2. Wait for read control bit == 0 in reply
3. Set read control bit = 1
4. Check the reply