EP3C5F256C8N Altera, EP3C5F256C8N Datasheet - Page 81
EP3C5F256C8N
Manufacturer Part Number
EP3C5F256C8N
Description
IC CYCLONE III FPGA 5K 256-FBGA
Manufacturer
Altera
Series
Cyclone® IIIr
Datasheets
1.EP3C5F256C8N.pdf
(5 pages)
2.EP3C5F256C8N.pdf
(34 pages)
3.EP3C5F256C8N.pdf
(66 pages)
4.EP3C5F256C8N.pdf
(14 pages)
5.EP3C5F256C8N.pdf
(76 pages)
6.EP3C10M164C8N.pdf
(350 pages)
Specifications of EP3C5F256C8N
Number Of Logic Elements/cells
5136
Number Of Labs/clbs
321
Total Ram Bits
423936
Number Of I /o
182
Voltage - Supply
1.15 V ~ 1.25 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
256-FBGA
No. Of Logic Blocks
321
Family Type
Cyclone III
No. Of I/o's
182
I/o Supply Voltage
3.3V
Operating Frequency Max
402MHz
Operating Temperature Range
0°C To +85°C
Rohs Compliant
Yes
For Use With
544-2601 - KIT DEV CYCLONE III LS EP3CLS200544-2411 - KIT DEV NIOS II CYCLONE III ED.
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
Other names
544-2423
EP3C5F256C8N
EP3C5F256C8N
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Chapter 5: Clock Networks and PLLs in the Cyclone III Device Family
Hardware Features
PLL Control Signals
© December 2009
1
1
Altera Corporation
You can use the following three signals to observe and control the PLL operation and
resynchronization.
pfdena
Use the pfdena signal to maintain the last locked frequency so that your system has
time to store its current settings before shutting down. The pfdena signal controls the
PFD output with a programmable gate. If you disable the PFD, the VCO operates at
its last set value of control voltage and frequency with some long-term drift to a lower
frequency.
areset
The areset signal is the reset or resynchronization input for each PLL. The device
input pins or internal logic can drive these input signals. When driven high, the PLL
counters reset, clearing the PLL output and placing the PLL out of lock. The VCO is
then set back to its nominal setting. When driven low again, the PLL resynchronizes
to its input as it re-locks.
You must include the areset signal in your designs if one of the following
conditions is true:
■
■
If the input clock to the PLL is toggling or unstable upon power up, assert the areset
signal after the input clock is stable and within specifications.
locked
The locked output indicates that the PLL has locked onto the reference clock and the
PLL clock outputs are operating at the desired phase and frequency set in the
Quartus II MegaWizard
Altera recommends that you use the areset and locked signals in your designs to
control and observe the status of your PLL.
This implementation is illustrated in
Figure 5–13. Locked Signal Implementation
PLL reconfiguration or clock switchover enabled in your design
Phase relationships between the PLL input clock and output clocks must be
maintained after a loss-of-lock condition
™
PLL
Plug-in Manager.
locked
Figure
V
CC
5–13.
D
OFF
Q
areset
Cyclone III Device Handbook, Volume 1
locked
5–17
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