AX500-1BG896 ACTEL [Actel Corporation], AX500-1BG896 Datasheet - Page 69

• Manufacturer Part Number: AX500-1BG896
• Description: Axcelerator Family FPGAs
• Manufacturer: ACTEL [Actel Corporation]

Global Resources
One of the most important aspects of any FPGA
architecture is its global resources or clocks. The
Axcelerator family provides the user with flexible and
easy-to-use global resources, without the limitations
normally found in other FPGA architectures.
The AX architecture contains two types of global
resources, the HCLK (hardwired clock) and CLK (routed
clock). Every Axcelerator device is provided with four
HCLKs and four CLKs for a total of eight clocks,
regardless of device density.
Timing Characteristics
Table 2-69 • AX125 Dedicated (Hardwired) Array Clock Networks
Table 2-70 • AX250 Dedicated (Hardwired) Array Clock Networks
Parameter
Dedicated (Hardwired) Array Clock Networks
t
t
t
t
t
t
t
Parameter
Dedicated (Hardwired) Array Clock Networks
t
t
t
t
t
t
t
HCKL
HCKH
HPWH
HPWL
HCKSW
HP
HMAX
HCKL
HCKH
HPWH
HPWL
HCKSW
HP
HMAX
Worst-Case Commercial Conditions V
Worst-Case Commercial Conditions V
Input Low to High
Input High to Low
Minimum Pulse Width High
Minimum Pulse Width Low
Maximum Skew
Minimum Period
Maximum Frequency
Input Low to High
Input High to Low
Minimum Pulse Width High
Minimum Pulse Width Low
Maximum Skew
Minimum Period
Maximum Frequency
Description
Description
CCA
CCA
= 1.425V, V
= 1.425V, V
v2.7
Min.
Min.
0.58
0.52
1.15
0.58
0.52
1.15
'–2' Speed
'–2' Speed
Hardwired Clocks
The hardwired (HCLK) is a low-skew network that can
directly drive the clock inputs of all sequential modules
(R-cells, I/O registers, and embedded RAM/FIFOs) in the
device with no antifuse in the path. All four HCLKs are
available everywhere on the chip.
CCI
CCI
= 3.0V, T
= 3.0V, T
Max.
Max.
3.02
3.03
0.06
2.57
2.61
0.06
870
870
J
J
= 70°C
= 70°C
Min.
Min.
0.65
0.59
1.31
0.65
0.59
1.31
'–1' Speed
'–1' Speed
Max.
Max.
2.93
2.97
0.07
3.44
3.46
0.07
763
763
Min.
Axcelerator Family FPGAs
Min.
0.77
0.69
1.54
0.77
0.69
1.54
'Std' Speed
'Std' Speed
Max.
Max.
3.45
3.50
0.08
4.05
4.06
0.08
649
649
Units
Units
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2-55