Timing Model and Specifications
Table 5–24. EPM570 Global Clock External I/O Timing Parameters (Part 2 of 2)
–3 Speed
Grade
–4 Speed
Grade
–5 Speed
Grade
–6 Speed
Grade
–7 Speed
Grade
Cond-
ition
Symbol Parameter
Unit
Min Max Min Max Min Max Min Max Min Max
tH
Global
clock hold
time
—
0.0
—
0.0
2.0
—
0.0
2.0
—
0
—
0
—
ns
tCO
Global
clock to
output
delay
10 pF 2.0
4.5
5.8
7.1
2.0
6.1
2.0
7.6
ns
tCH
Global
clock high
time
—
—
—
166
166
3.3
—
—
—
216
216
4.0
—
—
—
266
266
5.0
—
—
—
253
253
5.4
—
—
—
335
335
8.1
—
—
—
ps
ps
ns
tCL
Global
clock low
time
tCNT
Minimum
globalclock
period for
16-bit
counter
fCNT
Maximum
globalclock
frequency
for 16-bit
counter
—
—
304.0
(1)
—
247.5
—
201.1
—
184.1
—
123.5 MHz
Note to Table 5–24:
(1) The maximum frequency is limited by the I/O standard on the clock input pin. The 16-bit counter critical delay
performs faster than this global clock input pin maximum frequency.
5–24Core Version a.b.c variable
MAX II Device Handbook, Volume 1
Altera Corporation
July 2008
ALTERA [ ALTERA CORPORATION ]
