IPR-SRAM/QDRII Altera, IPR-SRAM/QDRII Datasheet - Page 42

• Manufacturer Part Number: IPR-SRAM/QDRII
• Description: IP CORE Renewal Of IP-SRAM/QDRII
• Manufacturer: Altera
• Type: MegaCorer

Specifications of IPR-SRAM/QDRII

• Software Application: IP CORE, Memory Controllers, SDRAM
• Supported Families: HardCopy II, Stratix
• Features: Automatic Concatenation Of Consecutive Reads And Writes, Easy-to-Use IP Toolbench Interface
• Core Architecture: FPGA
• Core Sub-architecture: HardCopy, Stratix
• Rohs Compliant: NA
• Function: QDRII SRAM Controller
• License: Renewal License
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

OpenCore Plus Time-Out Behavior
Figure 3–6. Timing Diagram of the IOE
OpenCore Plus
Time-Out
Behavior
Interfaces &
Signals
3–10
QDRII SRAM Controller MegaCore Function User Guide
Expected B[7:0]
part of B[7:0]
Delayed cq
Real B[7:0]
I/O A[7:0]
Usable
cqn
cq
f
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OpenCore Plus hardware evaluation can support the following two
modes of operation:
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■
All megafunctions in a device time out simultaneously when the most
restrictive evaluation time is reached. If there is more than refer to one
megafunction in a design, a specific megafunction’s time-out behavior
may be masked by the time-out behavior of the other megafunctions.
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Your design stops working after the hardware evaluation time expires,
the reads and writes go low, and the wait output goes high.
For more information on OpenCore Plus hardware evaluation, refer to
“OpenCore Plus Evaluation” on page 1–3
Evaluation of
This section describes the following topics:
■
■
Interface Description
This section describes the following Avalon interface requests:
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Untethered—the design runs for a limited time
Tethered—requires a connection between your board and the host
computer. If tethered mode is supported by all megafunctions in a
design, the device can operate for a longer time or indefinitely
“Interface Description” on page 3–10
“Signals” on page 3–22
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For MegaCore functions, the untethered time out is 1 hour; the
tethered time out value is indefinite.
MegaCore Version 9.1
Megafunctions.
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and
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AN 320: OpenCore Plus
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Altera Corporation
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November 2009
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