Actel SmartFusion2 MSS Fabric Interface Controller User Guide

Actel SmartFusion2 MSS Fabric Interface Controller

SmartDesign MSS External Memory Controller (EMC)

The SmartDesign MSS External Memory Controller (EMC) provides a seamless interface to external memories, supporting asynchronous memories and synchronous SRAM memory types. It has two chip select options, each addressing 64MB of address space that can be configured independently using the EMC Configurator tool.

Configuration Options

The following configuration options are available for the EMC:

• Invert Read/Write Signal Polarity
• Read Latency for First Access (HCLK cycles)
• Read Latency for Remaining Accesses (HCLK cycles)
• Write Latency (HCLK cycles)
• Use Alternate Chip Selection
• Pipeline Synchronous Read Cycle
• Pipeline Synchronous Write Cycle
• Inter Device Latency (HCLK cycles)
• Read data latency, next access
• Write data latency Chip select falling edge
• Write enable/byte enable
• Pipeline read
• Pipeline write
• Inter device delay

Usage Instructions

To configure the SmartDesign MSS External Memory Controller, use the EMC Configurator tool. The tool allows you to configure each chip select region independently.

Refer to the Actel SmartFusion Microcontroller Subsystem User’s Guide for complete details on configuring the EMC.

Contacting Support

If you encounter any issues or have questions, contact Actel Customer Technical Support Center. Actel Technical Support is available through the Actel website.

SmartDesign MSS
External Memory Controller (EMC) Configuration

Actel Corporation, Mountain View, CA 94043
© 2010 Actel Corporation. All rights reserved.
Printed in the United States of America
Part Number: 5-02-00226-0
Release: July 2010
No part of this document may be copied or reproduced in any form or by any means without prior written consent of Actel.
Actel makes no warranties with respect to this documentation and disclaims any implied warranties of merchantability or fitness for a particular purpose. Information in this document is subject to change without notice. Actel assumes no responsibility for any errors that may appear in this document.
This document contains confidential proprietary information that is not to be disclosed to any unauthorized person without prior written consent of Actel Corporation.

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Configuration Options

• The EMC provides a seamless interface to external memories. It supports asynchronous memories and synchronous SRAM memory types.
• For complete details please refer to the Actel SmartFusion Microcontroller Subsystem User’s Guide.
• The EMC Configurator helps you configure the SmartFusion MSS External Memory Controller.

Connectivity Options

• The EMC provides 2 chip select, each addressing 64MB of address space. The EMC configurator provides two regions (chip select 0 and 1) that can be configured independently.
• In this document, we provide a mapping between the EMC configurator’s labels and the EMC register bits as defined in the Actel SmartFusion Microcontroller Subsystem User’s Guide.

Table 1-1 · Configurator Labels and EMC Register Bits

Memory Type:

•    Asynchronous RAM

•    Synchronous RAM

•    NOR flash

•    None

| External Memory Type:

•    Asynchronous /PSRAM memory

•    Synchronous memory

•    NOR flash memory

•    No memory assigned

Port Size:

•    Byte

•    Half Word

| Port Size:

•    8-bit EMD data bus

•    16-bit EMD data bus

Invert Read/Write Signal Polarity| Read/Write polarity
Read Latency for First Access (HCLK cycles)| Read data latency, first access
Read Latency for Remaining Accesses (HCLK cycles)| Read data latency, next access
Write Latency (HCLK cycles)| Write data latency
Use Alternate Chip Selection| Chip select falling edge
Configure BYTEN port as:

•    Write Enable

•    Byte Enable

|

Write enable/byte enable

Pipeline Synchronous Read Cycle| Pipeline read
Pipeline Synchronous Write Cycle| Pipeline write
Inter Device Latency (HCLK cycles)| Inter device delay

Part Description

Table 2-1 · EMC Port Description

port size selection of the two EMC regions
BYTEN[1:0]| PADs| Out| Yes| Byte lane signals (BYTE_EN[1:0] in datasheet)
CS1_N| PADs| Out| Yes| Chip select 1
CS0_N| PADs| Out| Yes| Chip select 0
OEN1_N| PADs| Out| Yes| Output enable 1 (OE1_N in datasheet)
OEN0_N| PADs| Out| Yes| Output enable 0 (OE0_N in datasheet)
RW_N| PADs| Out| Yes| Read/write
CLK| PADs| Out| Yes| Clock

Notes:

• PAD ports are automatically promoted to top throughout the design hierarchy.
• Non-PAD ports must be promoted manually to the top level from the MSS configurator canvas to be available as the next level of hierarchy

Product Support

Actel backs its products with various support services including Customer Service, a Customer Technical Support Center, a web site, an FTP site, electronic mail, and worldwide sales offices. This appendix contains information about contacting Actel and using these support services.

Customer Service

• Contact Customer Service for non-technical product support, such as product pricing, product upgrades, update information, order status, and authorization.
• From Northeast and North Central U.S.A., call 650.318.4480
• From Southeast and Southwest U.S.A., call 650. 318.4480
• From South Central U.S.A., call 650.318.4434
• From Northwest U.S.A., call 650.318.4434
• From Canada, call 650.318.4480
• From Europe, call 650.318.4252 or +44 (0) 1276 401 500
• From Japan, call 650.318.4743
• From the rest of the world, call 650.318.4743
• Fax, from anywhere in the world 650.318.8044

Actel Customer Technical Support Center

Actel staffs its Customer Technical Support Center with highly skilled engineers who can help answer your hardware, software, and design questions. The Customer Technical Support Center spends a great deal of time creating application notes and answers to FAQs. So, before you contact us, please visit our online resources. It is very likely we have already answered your questions.

Actel Technical Support
Visit the Actel Customer Support website (www.actel.com/support/search/default.aspx) for more information and support. Many answers available on the searchable web resource include diagrams, illustrations, and links to other resources on the Actel web site

Website
You can browse a variety of technical and non-technical information on Actel’s home page, at www.actel.com.

Contacting the Customer Technical Support Center
Highly skilled engineers staff the Technical Support Center from 7:00 A.M. to 6:00 P.M., Pacific Time, Monday through Friday. Several ways of contacting the Center follow:
You can communicate your technical questions to our email address and receive answers back by email, fax, or phone. Also, if you have design problems, you can email your design files to receive assistance. We constantly monitor the email account throughout the day. When sending your request to us, please be sure to include your full name, company name, and your contact information for efficient processing of your request.
The technical support email address is tech@actel.com

Phone
Our Technical Support Center answers all calls. The center retrieves information, such as your name, company name, phone number and your question, and then issues a case number. The Center then forwards the information to a queue where the first available application engineer receives the data and returns your call. The phone hours are from 7:00 A.M. to 6:00 P.M., Pacific Time, Monday through Friday. The Technical Support numbers are
650.318.4460
800.262.1060
Customers needing assistance outside the US time zones can either contact technical support via email (tech@actel.com) or contact a local sales office. Sales office listings can be found at www.actel.com/company/contact/default.aspx.

Actel is the leader in low-power and mixed-signal FPGAs and offers the most comprehensive portfolio of system and power management solutions. Power Matters. Learn more at www.actel.com.
Actel Corporation • 2061 Stierlin Court • Mountain View, CA 94043  USA
Phone 650.318.4200  Fax 650.318.4600  Customer Service: 650.318.1010  Customer Applications Center: 800.262.1060
Actel Europe Ltd. River Court, Meadows Business Park Station Approach, Blackwater  Camberley Surrey GU17 9AB United Kingdom Phone +44 (0) 1276 609 300 Fax +44 (0) 1276 607 540
Actel Japan EXOS Ebisu Building 4F 1-24-14 Ebisu Shibuya-ku Tokyo 150 Japan
Phone +81.03.3445.7671 Fax +81.03.3445.7668 http://jp.actel.com
Actel Hong Kong  Room 2107, China Resources Building 26 Harbour Road Wanchai Hong Kong
Phone +852 2185 6460  Fax +852 2185 6488 www.actel.com.cn

References

• FPGAs and PLDs | Microchip Technology
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• FPGAs and PLDs | Microchip Technology
• FPGAs and PLDs | Microchip Technology
• FPGAs and PLDs | Microchip Technology
• FPGAs and PLDs | Microchip Technology

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