Altera DDR SDRAM Controller Bedienungsanleitung PDF herunterladen (Seite 8)

1–4 Chapter 1: About This Compiler

Performance and Resource Utilization

DDR and DDR2 SDRAM Controller Compiler User Guide March 2009 Altera Corporation

■ Burst lengths:

■ 2, 4, or 8, for DDR SDRAM

■ 4, for DDR2 SDRAM

■ Banks:

■ 4 for DDR SDRAM

■ 4 or 8 for DDR2 SDRAM

■ Support for ODT in DDR2 SDRAM

Performance and Resource Utilization

Table 1–3 shows typical performance results for the DDR SDRAM controller using the

Quartus II software version 9.0.

f For more information on device performance, refer to the relevant device handbook.

Table 1–4 shows typical sizes in logic elements (LEs) or adaptive look-up tables

(ALUTs) for the DDR SDRAM controller.

Table 1–3. Typical Performance

Device

System fMAX (MHz)

DDR SDRAM DDR2 SDRAM

Cyclone (EP1C20F400C6) 133 –

Cyclone II (EP2C35F672C6) 167 167

Stratix (EP1S25F780C5) 200 –

Stratix II (EP2S60F1020C3) 200 267 (1)

Stratix II GX (EP2SGX30CF780C3) 200 (2) 267 (1) (2)

Note to Table 1–3:

(1) For information on a solution that achieves speeds greater than 267 MHz (533 Mbps) up to 333 MHz (667 Mbps),

contact your local Altera sales representative. To achieve speeds greater than 267 MHz, a new dynamic

autocalibration circuit is required.

(2) Pending device characterization.

Table 1–4. Typical Size (Part 1 of 2) (Note 1)

Device Memory Width (Bits) LEs

Combinational

ALUTs Logic Registers M4K RAM Blocks (2)

Cyclone 16 860 — — 1

32 1,050 — — 2

Cyclone II 16 940 — — 1

32 1,120 — — 2

64 1,500 — — 4

72 1,600 — — 5

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 105 106

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Altera DDR SDRAM Controller Bedienungsanleitung Seite 8