FLEX 10K Embedded Programmable Logic Family Data Sheet
Table 114 summarizes the ClockLock and ClockBoost parameters.
Table 114. ClockLock & ClockBoost Parameters
Symbol
Parameter
Min Typ
Max Unit
tR
Input rise time
Input fall time
Input duty cycle
2
2
ns
ns
tF
tINDUTY
fCLK1
tCLK1
fCLK2
tCLK2
45
30
55
%
Input clock frequency (ClockBoost clock multiplication factor equals 1)
Input clock period (ClockBoost clock multiplication factor equals 1)
Input clock frequency (ClockBoost clock multiplication factor equals 2)
Input clock period (ClockBoost clock multiplication factor equals 2)
80
MHz
ns
12.5
16
33.3
50
MHz
ns
20
62.5
±1
fCLKDEV1 Input deviation from user specification in MAX+PLUS II (ClockBoost clock
multiplication factor equals 1) (1)
MHz
fCLKDEV2 Input deviation from user specification in MAX+PLUS II (ClockBoost clock
multiplication factor equals 2) (1)
±0.5
MHz
tINCLKSTB Input clock stability (measured between adjacent clocks)
100
10
1
ps
µs
ns
%
tLOCK
Time required for ClockLock or ClockBoost to acquire lock (2)
Jitter on ClockLock or ClockBoost-generated clock (3)
tJITTER
tOUTDUTY Duty cycle for ClockLock or ClockBoost-generated clock
40
50
60
Notes:
(1) To implement the ClockLock and ClockBoost circuitry with the MAX+PLUS II software, designers must specify the
input frequency. The MAX+PLUS II software tunes the PLL in the ClockLock and ClockBoost circuitry to this
frequency. The fCLKDEV parameter specifies how much the incoming clock can differ from the specified frequency
during device operation. Simulation does not reflect this parameter.
(2) During device configuration, the ClockLock and ClockBoost circuitry is configured before the rest of the device. If
the incoming clock is supplied during configuration, the ClockLock and ClockBoost circuitry locks during
configuration, because the tLOCK value is less than the time required for configuration.
(3) The tJITTER specification is measured under long-term observation.
The supply power (P) for FLEX 10K devices can be calculated with the
following equation:
Power
Consumption
P = P
+ P = (I
+ I
) × V + P
INT
IO
CCSTANDBY
CCACTIVE CC IO
Typical I
values are shown as I
in the FLEX 10K 5.0-V
CC0
CCSTANDBY
device DC operating conditions tables on pages 44, 47, and 50 of this data
sheet. The I value depends on the switching frequency and the
CCACTIVE
application logic. This value is calculated based on the amount of current
that each LE typically consumes. The P value, which depends on the
IO
device output load characteristics and switching frequency, can be
calculated using the guidelines given in Application Note 74 (Evaluating
Power for Altera Devices).
118
Altera Corporation
ALTERA [ ALTERA CORPORATION ]
