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Achronix Speedster22i DDR User Manual

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Table of Contents

Table of Figures ................................................................................................. 4

Features ............................................................................................................. 6

Introduction ....................................................................................................... 7

Interfaces ........................................................................................................... 9

Internal (core) Interface .......................................................................................................... 9

External (off-chip) Interface .................................................................................................. 11

Parameters .......................................................................................................................... 11

Address Mapping ............................................................................................ 14

Write Interface Details ..................................................................................... 15

Back-to-Back Write Protocol 2X Clock Mode ....................................................................... 19

Write Protocol with Wide Bus Interface Enabled .................................................................. 21

Read Interface Details ..................................................................................... 23

Back-to-Back Read Protocol 2X Clock Mode ....................................................................... 25

Read Protocol with Wide Bus Interface Enabled .................................................................. 27

Memory Interface Latency .............................................................................. 30

Customization using ACE ............................................................................... 31

Revision History .............................................................................................. 32

UG031, Nov 18, 2014

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