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EP2C35A15F324C6N Datasheet(PDF) 58 Page - Altera Corporation

Part # EP2C35A15F324C6N
Description  Cyclone II Device Family
Download  168 Pages
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Manufacturer  ALTERA [Altera Corporation]
Direct Link  http://www.altera.com
Logo ALTERA - Altera Corporation

EP2C35A15F324C6N Datasheet(HTML) 58 Page - Altera Corporation

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Altera Corporation
Cyclone II Device Handbook, Volume 1
February 2007
I/O Structure & Features
Figure 2–26. Cyclone II Device DQ & DQS Groups in ×8/×9 Mode
Notes (1), (2)
Notes to Figure 2–26:
(1)
Each DQ group consists of a DQS pin, DM pin, and up to nine DQ pins.
(2)
This is an idealized pin layout. For actual pin layout, refer to the pin table.
Cyclone II devices support the data strobe or read clock signal (DQS)
used in DDR and DDR2 SDRAM. Cyclone II devices can use either
bidirectional data strobes or unidirectional read clocks. The dedicated
external memory interface in Cyclone II devices also includes
programmable delay circuitry that can shift the incoming DQS signals to
center align the DQS signals within the data window.
The DQS signal is usually associated with a group of data (DQ) pins. The
phase-shifted DQS signals drive the global clock network, which is used
to clock the DQ signals on internal LE registers.
Table 2–15 shows the number of DQ pin groups per device.
DQ Pins
DQS Pin
DM Pin
DQ Pins
(2)
Table 2–15. Cyclone II DQS & DQ Bus Mode Support (Part 1 of 2)
Note (1)
Device
Package
Number of ×8
Groups
Number of ×9
Groups (5), (6)
Number of ×16
Groups
Number of ×18
Groups (5), (6)
EP2C5
144-pin TQFP (2)
3
300
208-pin PQFP
7 (3)
433
EP2C8
144-pin TQFP (2)
3
300
208-pin PQFP
7 (3)
433
256-pin FineLine BGA®
8 (3)
444
EP2C15
256-pin FineLine BGA
8
4
4
4
484-pin FineLine BGA
16 (4)
888
EP2C20
256-pin FineLine BGA
8
4
4
4
484-pin FineLine BGA
16 (4)
888


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