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SPXR2005VMM80R Datasheet(PDF) 10 Page - Freescale Semiconductor, Inc

Part # SPXR2005VMM80R
Description  PXS20 Microcontroller
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

SPXR2005VMM80R Datasheet(HTML) 10 Page - Freescale Semiconductor, Inc

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PXS20 Microcontroller Data Sheet, Rev. 1
Preliminary—Subject to Change Without Notice
Introduction
Freescale Semiconductor
10
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 at 120 MHz
— 0 wait states at 80 MHz and 60 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.
Data flash (bank1) interface includes a 128-bit register to temporarily hold a single flash page. This logic supports
single-cycle read responses (0 AHB data-phase wait states) for accesses that hit in the holding register.
— No prefetch support is provided for this bank.
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
The following functions are implemented:
ECC encoding (32-bit boundary for data and complete address bus)
ECC decoding (32-bit boundary and entire address)
Address translation from the AHB protocol on the XBAR to the SRAM array
The platform SRAM controller is replicated for each processor.


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