ALSTOM NRD109475 8RDA44670G01 SA44670.E工控備件模塊
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中文資料：
注意奇偶校驗(yàn)mezzanies僅在25 MHz主板上受支持ALSTOM NRD109475 8RDA44670G01 SA44670.E軟件在同一主板上支持混合奇偶校驗(yàn)和ECC存儲(chǔ)板。DRAM是四路交錯(cuò)的，以有效地支持高速緩存突發(fā)周期。
堆疊夾層可以堆疊兩個(gè)夾層板，以提供高達(dá)256MB的板載RAM（ECC）。? MVME187板和單個(gè)夾層板一起占用一個(gè)插槽。? 堆疊配置需要兩個(gè)VME板插槽。ALSTOM NRD109475 8RDA44670G01 SA44670.E
ALSTOM NRD109475 8RDA44670G01 SA44670.E編程注意事項(xiàng)? DRAM映射解碼器可以被編程以適應(yīng)不同的基本地址和夾層板的尺寸。? 板載DRAM被本地總線重置禁用，并且必須在訪問(wèn)DRAM之前進(jìn)行編程。ALSTOM NRD109475 8RDA44670G01 SA44670.E
英文資料：
Note Parity mezzanines are only supported on 25 MHz main boards ALSTOM NRD109475 8RDA44670G01 SA44670.E software does support mixed parity and ECC memory boards on the same main board. The DRAM is four-way interleaved to efficiently support cache burst cycles.
Stacking Mezzanines Two mezzanine boards may be stacked to provide up to 256MB of onboard RAM (ECC). ? The MVME187 board and a single mezzanine board together take one slot. ? The stacked configuration requires two VMEboard slots.ALSTOM NRD109475 8RDA44670G01 SA44670.E
ALSTOM NRD109475 8RDA44670G01 SA44670.E Programming Considerations ? The DRAM map decoder can be programmed to accommodate different base address(es) and sizes of mezzanine boards. ? Onboard DRAM is disabled by a local bus reset and must be programmed before the DRAM can be accessed.
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