AMC #ENABLE signal should reset MMC According to AMC specification

#ENABLE signal from MCH should be connected (but inverted) to #RST pin of MMC. This is even present in graphics in IPMI.schdoc

Please check commit:26aa3b1b

in commit:26aa3b1b AMC ENABLE# is connected to MMC reset# without negation. MMC will be disabled all the time.

commit:7b3ec421 should have this corrected, could you please check?

assigned to @tprzywoz

changed milestone to %AFC v4.0

marked #108 (closed) as a duplicate of this issue

I implemented circuit from Sayma AMC (RST signal is connected to #RST pin of MMC):

Solved in c961a747

closed

@KMacias reported some concerns on the operation of the above circuit in the table-top version, as then ACM_En will be floating and G will be high.

reopened

My mistake, I should have add information about mounting. R35 will be mounted only in final modules. During debugging and developing process we will use DIP switch to change the configuration: in MicroTCA ( short circuit with D pin of T9) or tabletop (only pull up for MRn signal).

Good catch, however, debugging on tabletop for maintenance also happens. Another way would be to connect this enable pin to the 12V that comes from the connector (may use a resistor + diode for adjusting the voltage), so it will always be enabled while powered from tabletop.

Looks good!

mentioned in commit 3eabfde6

closed

There is ENABLE# line left from the previous version, not connected anywhere (with R123 pull-up).

reopened

There is ENABLE# line left from the previous version, not connected anywhere (with R123 pull-up).

Deleted

mentioned in commit c2b15c2f

closed