a3p250 Actel Corporation, a3p250 Datasheet - Page 90

• Manufacturer Part Number: a3p250
• Description: Proasic3 Flash Family Fpgas With Optional Soft Arm Support
• Manufacturer: Actel Corporation

ProASIC3 DC and Switching Characteristics
Table 2-97 • A3P030 Global Resource
Table 2-98 • A3P060 Global Resource
2 -7 8
Parameter
t
t
t
t
t
F
Notes:
1. Value reflects minimum load. The delay is measured from the CCC output to the clock pin of a sequential
2. Value reflects maximum load. The delay is measured on the clock pin of the farthest sequential element,
3. For specific junction temperature and voltage supply levels, refer to
Parameter
t
t
t
t
t
F
Notes:
1. Value reflects minimum load. The delay is measured from the CCC output to the clock pin of a sequential
2. Value reflects maximum load. The delay is measured on the clock pin of the farthest sequential element,
3. For specific junction temperature and voltage supply levels, refer to
RCKL
RCKH
RCKMPWH
RCKMPWL
RCKSW
RCKL
RCKH
RCKMPWH
RCKMPWL
RCKSW
RMAX
RMAX
element, located in a lightly loaded row (single element is connected to the global net).
located in a fully loaded row (all available flip-flops are connected to the global net in the row).
values.
element, located in a lightly loaded row (single element is connected to the global net).
located in a fully loaded row (all available flip-flops are connected to the global net in the row).
values.
Input LOW Delay for Global Clock
Input HIGH Delay for Global Clock
Minimum Pulse Width HIGH for Global Clock
Minimum Pulse Width LOW for Global Clock
Maximum Skew for Global Clock
Maximum Frequency for Global Clock
Input LOW Delay for Global Clock
Input HIGH Delay for Global Clock
Minimum Pulse Width HIGH for Global Clock
Minimum Pulse Width LOW for Global Clock
Maximum Skew for Global Clock
Maximum Frequency for Global Clock
Global Tree Timing Characteristics
Global clock delays include the central rib delay, the spine delay, and the row delay. Delays do not
include I/O input buffer clock delays, as these are I/O standard–dependent, and the clock may be
driven and conditioned internally by the CCC module. For more details on clock conditioning
capabilities, refer to the
Table 2-103 on page 2-81
Minimum and maximum delays are measured with minimum and maximum loading.
Timing Characteristics
Commercial-Case Conditions: T
Commercial-Case Conditions: T
Description
Description
present minimum and maximum global clock delays within each device.
"Clock Conditioning Circuits" section on page
J
J
= 70°C, V
= 70°C, V
v1.2
CC
CC
Min.
Min.
0.67 0.81 0.76 0.92 0.89 1.09 1.07 1.31
0.68 0.85 0.77 0.97 0.91 1.14 1.09 1.37
0.71 0.93 0.81 1.05 0.95 1.24 1.14 1.49
0.70 0.96 0.80 1.09 0.94 1.28 1.13 1.54
= 1.425 V
= 1.425 V
1
1
–2
–2
Max.
Max.
0.18
0.26
2
2
Min.
Min.
1
1
–1
–1
Max.
Max.
Table 2-6 on page 2-6
Table 2-6 on page 2-6
0.21
0.29
2
2
Min.
Min.
Std.
Std.
1
1
Max.
Max.
0.24
0.34
2-82.
2
2
Min.
Min.
Table 2-97
1
1
–F
–F
for derating
for derating
Max.
Max.
0.29
0.41
2
2
Units
Units
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
to