afs600 Actel Corporation, afs600 Datasheet - Page 140

• Manufacturer Part Number: afs600
• Description: Actel Fusion Programmable System Chips Mixed-signal Family With Optional Arm Support
• Manufacturer: Actel Corporation

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
The I/Os also need to be configured in hot insertion mode if hot plugging compliance is required.
Table 2-71 • Levels of Hot-Swap Support
2 -1 2 6
Hot
Swapping
Level
1
2
3
4
Actel Fusion Programmable System Chips
Description
while bus idle
an active bus
Hot-swap on
while reset
Cold-swap
Hot-swap
Hot-swap
to Device Bus State
Applied
Power
Yes
Yes
Yes
No
Bus may have
ongoing, but
must be idle.
Held in reset
Held idle (no
device being
ongoing I/O
inserted or
processes
processes
insertion/
active I/O
removal)
removed
during
state
–
and maintained
Same as Level 2 Must remain
Same as Level 2
before, during,
Must be made
Connection
insertion/
Ground
and after
for 1 ms
removal
Card
A d v a n c e d v 1 . 4
–
to Bus Pins
Connected
power-down
power-up or
Circuitry
glitch-free
Device
Same as
Level 3
during
–
–
System and card with
Actel
powered down, then card
gets plugged into system,
then power supplies are
turned on for system but
not for FPGA on card.
In
specification, reset control
circuitry isolates the card
busses
supplies
nominal operating levels
and stable.
Board bus shared with
card bus is "frozen," and
there
activity on bus. It is critical
that the logic states set on
the bus signal do not get
disturbed
insertion/removal.
There is activity on the
system bus, and it is
critical
states set on the bus
signal
disturbed
insertion/removal.
Cards that Contain
Application with
Fusion Devices
Example of
PCI
FPGA
is
that
until
do
are
no
during
during
hot
the
not
the
chip
at
toggling
logic
their
plug
card
card
card
get
are
Compliant I/Os can but
do not have to be set to
hot insertion mode.
Compliant I/Os can but
do not have to be set to
hot insertion mode.
Compliant with cards
with
staging. I/Os have to be
set to hot insertion
mode.
Compliant with cards
with
staging. I/Os have to be
set to hot insertion
mode.
Fusion Devices
Compliance of
two
two
Table
levels
levels
2-71.
of
of