FLEX 10K Embedded Programmable Logic Device Family Data Sheet
Table 113. ClockLock & ClockBoost Parameters (Part 2 of 2)
Symbol
Parameter
Min Typ
Max Unit
fCLKDEV1 Input deviation from user specification in MAX+PLUS II (ClockBoost clock
multiplication factor equals 1) (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 f
parameter specifies how much the incoming clock can differ from the specified frequency
CLKDEV
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 t
value is less than the time required for configuration.
LOCK
(3) The t
specification is measured under long-term observation.
JITTER
The supply power (P) for FLEX 10K devices can be calculated with the
following equation:
Power
Consumption
P = PINT + PIO = (ICCSTANDBY + ICCACTIVE) × VCC + PIO
Typical ICCSTANDBY values are shown as ICC0 in the FLEX 10K device DC
operating conditions tables on pages 46, 49, and 52 of this data sheet. The
ICCACTIVE value depends on the switching frequency and the application
logic. This value is calculated based on the amount of current that each LE
typically consumes. The PIO value, which depends on the device output
load characteristics and switching frequency, can be calculated using the
guidelines given in Application Note 74 (Evaluating Power for Altera Devices).
1
Compared to the rest of the device, the embedded array
consumes a negligible amount of power. Therefore, the
embedded array can be ignored when calculating supply
current.
The ICCACTIVE value is calculated with the following equation:
µA
--------------------------
×
ICCACTIVE = K × fMAX × N × togLC
MHz × LE
The parameters in this equation are shown below:
120
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