參數(shù)資料
型號: GT-64010A
廠商: Galileo Technology Services, LLC
英文描述: System Controller with PCI Interface for R4XXX/ R5000 Family CPUs(帶PCI接口用于R4XXX/ R5000 系列 CPUs的系統(tǒng)控制器)
中文描述: 系統(tǒng)控制器的PCI R4XXX接口/ R5000系列處理器(帶的PCI接口用于R4XXX / R5000系列處理器的系統(tǒng)控制器)
文件頁數(shù): 39/111頁
文件大?。?/td> 671K
代理商: GT-64010A
GT-64010A System Controller with PCI Interface for R4XXX/R5000 Family CPUs
33
Rev is io n 1. 1
Galileo
TechnologyTM
out involving the CPU. The location of the next record is in the Next Record Pointer register (NextRecPtr) and the DMA
controller will fetch records every DMA transfer end until it reaches the NULL pointer (NULL pointer is zero).
There are several mechanisms for status and control of the DMA operations. An status interrupt can be programmed to
be asserted every time the DMA byte count reaches zero, or only when byte count reaches zero and the record is the
last record in the chain (the NextRecPtr is NULL). In addition, there is a status bit that indicates if a channel is active or
not. A channel is active when it is enabled and its byte count is other than zero, or in chained mode when both its byte
count is not equal to zero or its NextRecPtr is not equal to NULL, or when it is disabled and its internal FIFO is not
empty. A channel can be controlled by disabling it temporarily, and a next record fetch can be forced through Fet-
NexRec in Chained mode even if the current DMA has not ended.
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參數(shù)描述
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GT64010AB1 制造商:GALILEO 功能描述:*
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