Initializing SDRAM Parameters for Motorola MPC106-Based Systems

2022-04-26
This document describes the correlation of the programmable SDRAM interface parameters of Motorola's MPC106 PCI bridge/memory controller and typical SDRAM parameters found in manufacturers' data sheets. The MPC106 PCI bridge/memory controller provides a PowerPC™ microprocessor common hardware reference platform (CHRP™) compliant bridge between the PowerPC microprocessor family and the Peripheral Component Interconnect (PCI) bus.
Additional information about the topics discussed in this document can be found in MPC106 PCI Bridge/Memory Controller User's Manual (order #: MPC106UM/AD), and Addendum to MPC106 PCI Bridge/Memory Controller User's Manual: MPC106 Revision 4.0 Supplement and User's Manual Errata (order #: MPC106UMAD/AD). In this document, the term '106' is used as an abbreviation for, 'MPC106 PCI bridge/memory controller'.
To locate any published errata or updates for this document.
Note that this document describes the parameters for Rev. 4.0 of the MPC106. Earlier revisions are slightly different, but the information presented here is applicable with minor adjustment. For example, Rev. 4.0 has a 10-bit BSTOPRE parameter while Rev. 3.0 has an 8-bit BSTOPRE parameter. This means that while Rev. 4.0 devices can have a burst-to-precharge interval of 1023 clock cycles, Rev 3.0 devices are restricted to an interval of 255 clock cycles.

NXP

MPC106

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PCI bridge/memory controller

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Application note & Design Guide

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6/2003

Rev. 0.1

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