EP4CE40 datasheet(153/488 Pages) ALTERA

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Chapter 7: External Memory Interfaces in Cyclone IV Devices

7–7

Cyclone IV Devices Memory Interfaces Pin Support

May 2013

Altera Corporation

Cyclone IV Device Handbook,

Volume 1

f For more information about device package outline, refer to the Device Packaging

Specifications webpage.

DQS

pins are listed in the Cyclone IV pin tables as DQSXY, in which X indicates the DQS

grouping number and Y indicates whether the group is located on the top (T), bottom

(B), or right (R) side of the device. Similarly, the corresponding DQ pins are marked as

DQXY

, in which the X denotes the DQ grouping number and Y denotes whether the

group is located on the top (T), bottom (B), or right (R) side of the device. For example,

DQS2T

indicates a DQS pin belonging to group 2, located on the top side of the device.

Similarly, the DQ pins belonging to that group is shown as DQ2T.

1 Each DQ group is associated with its corresponding DQS pins, as defined in the Cyclone

IV pin tables. For example:

■

For DDR2 or DDR SDRAM, ×8 DQ group DQ3B[7..0] pins are associated with

the DQS3B pin (same 3B group index)

■

For QDR II SRAM, ×9 Q read-data group DQ3T[8..0] pins are associated with

DQS0T/CQ0T

and DQS1T/CQ0T# pins (same 0T group index)

The Quartus® II software issues an error message if a DQ group is not placed properly

with its associated DQS.

EP4CE40

EP4CE55

EP4CE75

484-pin UBGA

Left

Right

Bottom

Top

484-pin FBGA

Left

Right

Bottom

Top

780-pin FBGA

Left

Right

Bottom

Top

Notes to Table 7–2:

(1) Some of the DQ pins can be used as RUP and RDN pins. You cannot use these groups if you are using these pins as RUP and RDN pins for

OCT calibration.

(2) Some of the DQ pins can be used as RUP pins while the DM pins can be used as RDN pins. You cannot use these groups if you are using the

RUP and RDN pins for OCT calibration.

(3) There is no DM pin support for these groups.

(4) PLLCLKOUT3n and PLLCLKOUT3p pins are shared with the DQ or DM pins to gain ×8 DQ group. You cannot use these groups if you are using

PLLCLKOUT3n

and PLLCLKOUT3p.

Table 7–2. Cyclone IV E Device DQS and DQ Bus Mode Support for Each Side of the Device (Part 3 of 3)

Device

Package

Side

Number

×8

Groups

Number

×9

Groups

Number

×16

Groups

Number

×18

Groups

Number

×32

Groups

Number

×36

Groups

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