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EP1C12F100I7 Datasheet(PDF) 41 Page - Altera Corporation

Part # EP1C12F100I7
Description  Cyclone FPGA Family
Download  94 Pages
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Manufacturer  ALTERA [Altera Corporation]
Direct Link  http://www.altera.com
Logo ALTERA - Altera Corporation

EP1C12F100I7 Datasheet(HTML) 41 Page - Altera Corporation

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Preliminary Information
Cyclone FPGA Family Data Sheet
Each PLL has one pre-scale divider, n, that can range in value from 1 to 32.
Each PLL also has one multiply divider, m, that can range in value from 2
to 32. Global clock outputs have two post scale G dividers for global clock
outputs, and external clock outputs have an E divider for external clock
output, both ranging from 1 to 32. The Quartus II software automatically
chooses the appropriate scaling factors according to the input frequency,
multiplication, and division values entered.
External Clock Inputs
Each PLL supports single-ended or differential inputs for source-
synchronous receivers or for general-purpose use. The dedicated clock
pins (CLK[3..0]) feed the PLL inputs. These dual-purpose pins can also
act as LVDS input pins. See Figure 25.
Table 11 shows the I/O standards supported by PLL input and output
pins.
For more information on LVDS I/O support, see “LVDS I/O Pins” on
page 59.
External Clock Outputs
Each PLL supports one differential or one single-ended output for source-
synchronous transmitters or for general-purpose external clocks. If the
PLL does not use these PLL_OUT pins, the pins are available for use as
general-purpose I/O pins. The PLL_OUT pins support all I/O standards
shown in Table 11.
Table 11. PLL I/O Standards
I/O Standard
CLK Input
EXTCLK Output
3.3-V LVTTL/LVCMOS
vv
2.5-V LVTTL/LVCMOS
vv
1.8-V LVTTL/LVCMOS
vv
1.5-V LVCMOS
vv
3.3-V PCI
vv
LVDS
vv
SSTL-2 class I
vv
SSTL-2 class II
vv
SSTL-3 class I
vv
SSTL-3 class II
vv
Differential SSTL-2
v


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