SPC56EL54X datasheet(17/165 Pages) STMICROELECTRONICS

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SPC56ELx, SPC564Lx

Introduction

164

The SRAM module provides the following features:



System SRAM: 128 KB



ECC on 32-bit word (syndrome of 7 bits)

–

ECC covers SRAM bus address



1-bit error correction, 2-bit error detection



Wait states:

–

1 wait state for frequencies =< 120 MHz

–

0 wait states for frequencies =< 80 MHz

1.5.7

Platform flash memory controller

The following list summarizes the key features of the flash memory controller:



Single AHB port interface supports a 64-bit data bus. All AHB aligned and unaligned

reads within the 32-bit container are supported. Only aligned word writes are

supported.



Array interfaces support a 128-bit read data bus and a 64-bit write data bus for each

bank.



Code flash (bank0) interface provides configurable read buffering and page prefetch

support.

–

Four page-read buffers (each 128 bits wide) and a prefetch controller support

speculative reading and optimized flash access.



Single-cycle read responses (0 AHB data-phase wait states) for hits in the buffers. The

buffers implement a least-recently-used replacement algorithm to maximize

performance.



Programmable response for read-while-write sequences including support for stall-

while-write, optional stall notification interrupt, optional flash operation abort, and

optional abort notification interrupt.



Separate and independent configurable access timing (on a per bank basis) to support

use across a wide range of platforms and frequencies.



Support of address-based read access timing for emulation of other memory types.



Support for reporting of single- and multi-bit error events.



Typical operating configuration loaded into programming model by system reset.

The platform flash controller is replicated for each processor.

1.5.8

Platform Static RAM Controller (SRAMC)

The SRAMC module is the platform SRAM array controller, with integrated error detection

and correction.

The main features of the SRAMC provide connectivity for the following interfaces:



XBAR Slave Port (64-bit data path)



ECSM (ECC Error Reporting, error injection and configuration)



SRAM array

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