Altera QDRII SRAM Controller MegaCore Function Uživatelský manuál stáhnout pdf (Strana 35)

Altera Corporation MegaCore Version 9.1 3–3

November 2009 QDRII SRAM Controller MegaCore Function User Guide

Functional Description

Resynchronization & Pipeline Logic

Figure 3–3 shows the resynchronization and pipeline logic block

diagram.

Figure 3–3. Resynchronization & Pipeline Logic Block Diagram

Address & Command Pipeline

The optional address and command pipeline pipelines all commands and

addresses by a predefined number of cycles.

Optional

Address &

Command

Pipeline

Optional

Read Data

Pipeline

Optional

Write Data

Pipeline

From Datapath

Capture

Registers

To Control

Block

Read FSM

From

Control

Logic

From

Control

Logic

Resynchronization

Training

Group

Module

Training Group

Modules

Training

Group

Module

Resynchronization

& Pipeline Logic

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 67 68

QDRII SRAM Controller 1
MegaCore Function User Guide 1
UG-IPQDRII-8.1 2
Contents 3
Additional Information 4
1. About This MegaCore 5
Function 5
Features 6
General 6
Description 6
OpenCore Plus Evaluation 7
Performance 8
Utilization 8
2. Getting Started 11
QDRII SRAM 12
Controller 12
Walkthrough 12
Launch IP Toolbench 14
Step 1: Parameterize 15
Step 3: Set Up Simulation 17
Step 2: Constraints 17
Step 4: Generate 18
Simulate the 21
Example Design 21
Simulate the Example Design 22
Library Filename 23
VHDL Gate-Level Simulations 24
● altera_mf_ver 25
● lpm_ver 25
● sgate_ver 25
● <device name>_ver 25
● auk_qdrii_lib 25
Edit the PLL 28
Compile the 29
Compile the Example Design 30
Program a 31
Implement Your 31
Set Up Licensing 31
3. Functional Description 33
Control Logic 34
Functional Description 35
Write Data Pipeline 36
Training Group Module 36
Read Data Pipeline 36
Resynchronization Logic 36
Datapath 37
Block Description 38
Clock Generator 39
Write Registers 39
The Capture Group Module 39
OpenCore Plus 42
Time-Out 42
Behavior 42
Interfaces & 42
Interfaces & Signals 44
Signal Direction Description 54
Device-Level 58
Configuration 58
Megawizard 60
Parameters 61
Parameter Value Description 62
Board & Controller 63
Project Settings 65
MegaCore 66
Verification 66
Typographic 68
Conventions 68

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