EP2C5T144C8N 参数 Datasheet PDF下载

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.

Table 1–3. Total Number of Non-Migratable I/O Pins for Cyclone II Vertical Migration Paths

Vertical

144-Pin TQFP

Migration Path

EP2C5 to

EP2C8

EP2C8 to

EP2C15

EP2C15 to

EP2C20

EP2C20 to

EP2C35

EP2C35 to

EP2C50

EP2C50 to

EP2C70

Notes to

Table 1–3:

(1)

(2)

(3)

(4)

(5)

Vertical migration between the EP2C5F256 to the EP2C15AF256 and the EP2C5F256 to the EP2C20F256 devices is

not supported.

When migrating from the EP2C20F484 device to the EP2C50F484 device, a total of 39 I/O pins are non-migratable.

When migrating from the EP2C35F672 device to the EP2C70F672 device, a total of 56 I/O pins are non-migratable.

In addition to the one non-migratable I/O pin, there are 34 DQ pins that are non-migratable.

The pinouts of 484 FBGA and 484 UBGA are the same.

208-Pin

PQFP

4

—

—

—

256-Pin

484-Pin

672-Pin

484-Pin Ultra

FineLine BGA FineLine BGA

FineLine BGA

FineLine BGA

(1)

(2)

(3)

1

(4)

30

0

—

—

—

—

—

0

28

—

—

—

—

—

28

(5)

28

—

—

—

—

28

28

4

—

—

—

—

—

—

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.

Altera Corporation

February 2008

1–7

Cyclone II Device Handbook, Volume 1