EP1S20F672I7 Altera, EP1S20F672I7 Datasheet - Page 103
![IC STRATIX FPGA 20K LE 672-FBGA](/photos/6/73/67394/ds-672fbga205-2_0_sml.jpg)
EP1S20F672I7
Manufacturer Part Number
EP1S20F672I7
Description
IC STRATIX FPGA 20K LE 672-FBGA
Manufacturer
Altera
Series
Stratix®r
Datasheet
1.EP1S10F780C7.pdf
(276 pages)
Specifications of EP1S20F672I7
Number Of Logic Elements/cells
18460
Number Of Labs/clbs
1846
Total Ram Bits
1669248
Number Of I /o
426
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
672-FBGA
Family Name
Stratix
Number Of Logic Blocks/elements
18460
# I/os (max)
426
Frequency (max)
420.17MHz
Process Technology
0.13um (CMOS)
Operating Supply Voltage (typ)
1.5V
Logic Cells
18460
Ram Bits
1669248
Operating Supply Voltage (min)
1.425V
Operating Supply Voltage (max)
1.575V
Operating Temp Range
-40C to 100C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
672
Package Type
FBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
EP1S20F672I7
Manufacturer:
ALTERA/阿尔特拉
Quantity:
20 000
Company:
Part Number:
EP1S20F672I7N
Manufacturer:
ALTERA20
Quantity:
212
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Figure 2–53. Clock Switchover Circuitry
Altera Corporation
July 2005
INCLK0
INCLK1
There are two possible ways to use the clock switchover feature.
■
■
SMCLKSW
Use automatic switchover circuitry for switching between inputs of
the same frequency. For example, in applications that require a
redundant clock with the same frequency as the primary clock, the
switchover state machine generates a signal that controls the
multiplexer select input on the bottom of
secondary clock becomes the reference clock for the PLL.
Use the clkswitch input for user- or system-controlled switch
conditions. This is possible for same-frequency switchover or to
switch between inputs of different frequencies. For example, if
inclk0 is 66 MHz and inclk1 is 100 MHz, you must control the
switchover because the automatic clock-sense circuitry cannot
monitor primary and secondary clock frequencies with a frequency
difference of more than ±20%. This feature is useful when clock
sources can originate from multiple cards on the backplane,
requiring a system-controlled switchover between frequencies of
operation. You can use clkswitch together with the lock signal to
trigger the switch from a clock that is running but becomes unstable
and cannot be locked onto.
MUXOUT
Sense
Enhanced PLL
Clock
n Counter
State Machine
Switch-Over
Δt
Stratix Device Handbook, Volume 1
Figure
PFD
2–53. In this case, the
Stratix Architecture
CLK0_BAD
CLK1_BAD
Active Clock
CLKLOSS
CLKSWITCH
FBCLK
2–89
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