Altera Stratix - DDR Memory Support Overview

3–10 Altera Corporation
Stratix Device Handbook, Volume 2 June 2006
DDR Memory Support Overview
DDR Memory
Support
Overview
Table 3–1 shows the external RAM support in Stratix EP1S10 through
EP1S40 devices and all Stratix GX devices. Table 3–2 shows the external
RAM support in Stratix EP1S60 and EP1S80 devices.
Table 3–1. External RAM Support in Stratix EP1S10 through EP1S40 & All Stratix GX Devices
DDR Memory Type
I/O
Standard
Maximum Clock Rate (MHz)
-5 Speed
Grade
-6 Speed Grade -7 Speed Grade -8 Speed Grade
Flip-Chip Flip-Chip
Wire-
Bond
Flip-
Chip
Wire-
Bond
Flip-
Chip
Wire-
Bond
DDR SDRAM (1),
(2)
SSTL-2 200 167 133 133 100 100 100
DDR SDRAM - side
banks (2), (3), (4)
SSTL-2 150 133 110 133 100 100 100
RLDRAM II (4) 1.8-V HSTL 200 (5) (5) (5) (5) (5) (5)
QDR SRAM (6) 1.5-V HSTL 167 167 133 133 100 100 100
QDRII SRAM (6) 1.5-V HSTL 200 167 133 133 100 100 100
ZBT SRAM (7) LVTTL 200 200 200 167 167 133 133
Notes to Ta b le 3 – 1 :
(1) These maximum clock rates apply if the Stratix device uses DQS phase-shift circuitry to interface with DDR
SDRAM. DQS phase-shift circuitry is only available on the top and bottom I/O banks (I/O banks 3, 4, 7, and 8).
(2) For more information on DDR SDRAM, see AN 342: Interfacing DDR SDRAM with Stratix & Stratix GX Devices.
(3) DDR SDRAM is supported on the Stratix device side I/O banks (I/O banks 1, 2, 5, and 6) without dedicated DQS
phase-shift circuitry. The read DQS signal is ignored in this mode.
(4) These performance specifications are preliminary.
(5) This device does not support RLDRAM II.
(6) For more information on QDR or QDRII SRAM, see AN 349: QDR SRAM Controller Reference Design for Stratix &
Stratix GX Devices.
(7) For more information on ZBT SRAM, see AN 329: ZBT SRAM Controller Reference Design for Stratix and Stratix GX
Devices.
Table 3–2. External RAM Support in Stratix EP1S60 & EP1S80 (Part 1 of 2)
DDR Memory Type I/O Standard
Maximum Clock Rate (MHz)
-5 Speed Grade -6 Speed Grade -7 Speed Grade
DDR SDRAM (1), (2) SSTL-2 167 167 133
DDR SDRAM - side banks (2), (3) SSTL-2 150 133 133
QDR SRAM (4) 1.5-V HSTL 133 133 133
QDRII SRAM (4) 1.5-V HSTL 167 167 133