M1AFS600-PQ208 Datasheet, PDF (160/334 Pages) Microsemi Corporation – Fusion Family of Mixed Signal FPGAs

Device Architecture
Hot-Swap Support
Hot-swapping (also called hot plugging) is the operation of hot insertion or hot removal of a card in (or
from) a powered-up system. The levels of hot-swap support and examples of related applications are
described in Table 2-74. The I/Os also need to be configured in hot insertion mode if hot plugging
compliance is required.
Table 2-74 • Levels of Hot-Swap Support
Hot
Power
Swapping
Applied
Level
Description to Device Bus State
Device
Example of
Card
Circuitry Application with
Ground Connected Cards that Contain
Connection to Bus Pins Fusion Devices
Compliance of
Fusion Devices
1
Cold-swap No –
–
–
System and card with Compliant I/Os
Microsemi FPGA chip can but do not
are powered down, have to be set to
then card gets
hot insertion
plugged into system, mode.
then power supplies
are turned on for
system but not for
FPGA on card.
2
Hot-swap
Yes Held in
Must be made –
while reset
reset state and
maintained for
1 ms before,
during, and
after insertion/
removal
In PCI hot plug
specification, reset
control circuitry
isolates the card
busses until the card
supplies are at their
nominal operating
levels and stable.
Compliant I/Os
can but do not
have to be set to
hot insertion
mode.
3
Hot-swap
Yes Held idle Same as
Must remain Board bus shared Compliant with
while bus
(no ongoing Level 2
glitch-free with card bus is
cards with two
idle
I/O
during
"frozen," and there is levels of staging.
processes
power-up or no toggling activity on I/Os have to be
during
power-down bus. It is critical that set to hot
insertion/re
the logic states set on insertion mode.
moval)
the bus signal do not
get disturbed during
card
insertion/removal.
4
Hot-swap on Yes Bus may Same as
Same as There is activity on Compliant with
an active
have active Level 2
Level 3
the system bus, and it cards with two
bus
I/O
is critical that the logic levels of staging.
processes
states set on the bus I/Os have to be
ongoing,
signal do not get
set to hot
but device
disturbed during card insertion mode.
being
insertion/removal.
inserted or
removed
must be
idle.
2-144
Revision 4