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EP2C35A15F324C6N Datasheet(PDF) 9 Page - Altera Corporation |
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EP2C35A15F324C6N Datasheet(HTML) 9 Page - Altera Corporation |
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9 / 168 page  Altera Corporation 1–7 February 2008 Cyclone II Device Handbook, Volume 1 Introduction Vertical migration means that you can migrate to devices whose dedicated pins, configuration pins, and power pins are the same for a given package across device densities. 1 When moving from one density to a larger density, I/O pins are often lost because of the greater number of power and ground pins required to support the additional logic within the larger device. For I/O pin migration across densities, you must cross reference the available I/O pins using the device pin-outs for all planned densities of a given package type to identify which I/O pins are migratable. To ensure that your board layout supports migratable densities within one package offering, enable the applicable vertical migration path within the Quartus II software (go to Assignments menu, then Device, then click the Migration Devices button). After compilation, check the information messages for a full list of I/O, DQ, LVDS, and other pins that are not available because of the selected migration path. Table 1–3 lists the Cyclone II device package offerings and shows the total number of non-migratable I/O pins when migrating from one density device to a larger density device. Table 1–3. Total Number of Non-Migratable I/O Pins for Cyclone II Vertical Migration Paths Vertical Migration Path 144-Pin TQFP 208-Pin PQFP 256-Pin FineLine BGA (1) 484-Pin FineLine BGA (2) 484-Pin Ultra FineLine BGA 672-Pin FineLine BGA (3) EP2C5 to EP2C8 44 1 (4) —— — EP2C8 to EP2C15 —— 30 — — — EP2C15 to EP2C20 —— 0 0 —— EP2C20 to EP2C35 —— 16 — — EP2C35 to EP2C50 — — — 28 28 (5) 28 EP2C50 to EP2C70 —— —— 28 28 Notes to Table 1–3: (1) Vertical migration between the EP2C5F256 to the EP2C15AF256 and the EP2C5F256 to the EP2C20F256 devices is not supported. (2) When migrating from the EP2C20F484 device to the EP2C50F484 device, a total of 39 I/O pins are non-migratable. (3) When migrating from the EP2C35F672 device to the EP2C70F672 device, a total of 56 I/O pins are non-migratable. (4) In addition to the one non-migratable I/O pin, there are 34 DQ pins that are non-migratable. (5) The pinouts of 484 FBGA and 484 UBGA are the same. |
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