AEROFLEX GAISLER
80
RT-SPW-ROUTER
Copyright Aeroflex Gaisler AB
June 2012, Version 1.2
9
Clock generation
9.1
Overview
The clock generator implements internal clock generation and buffering.
9.2
Signal definitions and reset values
The signals and their reset values are described in table 76.
9.3
Timing
The timing waveforms and timing parameters are shown in figure 31 and are defined in table 77.
Note 1:
The minimum clock period, and the resulting maximum clock frequency, is dependent on
the manufacturing lot for the Actel RTAX2000S/SL parts and expected radiation levels.
The degradation criterion for Propagation Delays for the RTAX2000S/SL parts is accord-
ing to Actel Total Ionizing Dose Test Report 10% at 300 krad (Si). The above specified
timing values are guaranteed up to 50 krad (Si).
If a higher total ionizing dose is expected than 50 krad (Si), the corresponding post-anneal-
ing propagation delays that can be found in the Actel Total Ionizing Dose Test Report can
be used to degrade the timing more accurately (typical degradation is within 1% after 300
krad (Si)).
The functional behavior of the part is guaranteed up to 300 krad (Si).
Table 76. Signal definitions and reset values
Signal name
Type
Function
Active
Reset value
clk
Input
System clock
Rising edge
-
Table 77. Timing parameters
Name
Parameter
Reference edge
Min
Max
Unit
t
CLK
GEN0
clock period (CID 1)
-
40
-
ns
1)
t
CLK
GEN0
clock period (CID 2)
-
30
-
ns
1)
Figure 31. Timing waveforms
clk
t
CLKGEN0
