EMERSON VE4036P2控制器
VMEbus橋除了其PC/AT功能之外，VMIVME-7750具有以下VMEbus功能：?完整的六行地址修改器（AM代碼）可編程性?VME數據接口，具有獨立的硬件字節/字交換，用于主和從訪(fǎng)問(wèn)?支持VME64多路MBLT 64位VMEbus塊傳輸?用戶(hù)配置中斷器?用戶(hù)配置的中斷處理器?系統控制器模式，具有可編程VMEbus仲裁器（支持PRI、SGL和RRS模式）?VMEbus BERR總線(xiàn)錯誤計時(shí)器（軟件可編程）?從VMEbus到本地RAM和郵箱寄存器的從屬訪(fǎng)問(wèn)?全功能可編程VMEbus請求器（支持ROR、RWD和BCAP模式）?系統控制器自動(dòng)檢測?通過(guò)五個(gè)單獨的保護模式內存窗口完成VMEbus主訪(fǎng)問(wèn)VMIVME-7750支持主配置和從配置中的字節、字和長(cháng)字的高吞吐量DMA傳輸。如果不需要Endian轉換，VMIC提供了一種特殊的“繞過(guò)”模式，可用于進(jìn)一步提高吞吐量（不適用于字節傳輸）。
VMEbus Bridge
In addition to its PC/AT functions, the VMIVME-7750 has the following VMEbus
features:
? Complete six-line Address Modifier (AM-Code) programmability
? VME data interface with separate hardware byte/word swapping for master
and slave accesses
? Support for VME64 multiplexed MBLT 64-bit VMEbus block transfers
? User-configured interrupter
? User-configured interrupt handler
? System Controller mode with programmable VMEbus arbiter
(PRI, SGL and RRS modes are supported)
? VMEbus BERR bus error timer (software programmable)
? Slave access from the VMEbus to local RAM and mailbox registers
? Full-featured programmable VMEbus requester
(ROR, RWD and BCAP modes are supported)
? System Controller auto detection
? Complete VMEbus master access through five separate Protected-mode
memory windows
The VMIVME-7750 supports High Throughput DMA transfers of bytes, words and
longwords in both Master and Slave configurations.
If Endian conversion is not needed, VMIC offers a special “Bypass” mode that can be
used to further enhance throughput (not available for byte transfers).
