Chapter 7: External Memory Interfaces in Cyclone IV Devices
7–7
Cyclone IV Devices Memory Interfaces Pin Support
March 2016
Altera Corporation
f
For more information about device package outline, refer to the
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
4
4
2
2
1
1
Right
4
4
2
2
1
1
Bottom
4
4
2
2
1
1
Top
4
4
2
2
1
1
484-pin FBGA
Left
4
4
2
2
1
1
Right
4
4
2
2
1
1
Bottom
4
4
2
2
1
1
Top
4
4
2
2
1
1
780-pin FBGA
Left
4
4
2
2
1
1
Right
4
4
2
2
1
1
Bottom
6
6
2
2
1
1
Top
6
6
2
2
1
1
(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
Содержание Cyclone IV
Страница 10: ...x Chapter Revision Dates Cyclone IV Device Handbook March 2016 Altera Corporation Volume 1...
Страница 14: ...I 2 Section I Device Core Cyclone IV Device Handbook March 2016 Altera Corporation Volume 1...
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Страница 164: ...III 2 Section III System Integration Cyclone IV Device Handbook March 2016 Altera Corporation Volume 1...
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