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EP1C12F100I7 Datasheet(PDF) 52 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) 52 Page - Altera Corporation

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Altera Corporation
Cyclone FPGA Family Data Sheet
Preliminary Information
DDR SDRAM & FCRAM
Cyclone devices have dedicated circuitry for interfacing with DDR
SDRAM. All I/O banks support DDR SDRAM and FCRAM I/O pins.
However, the configuration input pins in bank 1 must operate at 2.5 V
because the SSTL-2 VCCIO level is 2.5 V. Additionally, the configuration
output pins (nSTATUS and CONF_DONE) and all the JTAG pins in I/O
bank 3 must operate at 2.5 V because the VCCIO level of SSTL-2 is 2.5 V.
I/O banks 1, 2, 3, and 4 support DQS signals with DQ bus modes of
×8.
For
×8 mode, there are up to eight groups of programmable DQS and DQ
pins, I/O banks 1, 2, 3, and 4 each have two groups in the 324-pin and
400-pin FineLine BGA packages. Each group consists of one DQS pin, a set
of eight DQ pins, and one DM pin (see Figure 33). Each DQS pin drives the
set of eight DQ pins within that group.
Figure 33. Cyclone Device DQ & DQS Groups in
×8 Mode
Note (1)
Note to Figure 33:
(1)
Each DQ group consists of one DQS pin, eight DQ pins, and one DM pin.
DQ Pins
DQS Pin
DM Pin
Top, Bottom, Left, or Right I/O Bank


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