參數(shù)資料
型號: CD1865
廠商: Intel Corp.
英文描述: Intelligent Eight-Channel Communications Controller
中文描述: 智能八通道通信控制器
文件頁數(shù): 45/150頁
文件大?。?/td> 871K
代理商: CD1865
Intelligent Eight-Channel Communications Controller
CD1865
Datasheet
45
devices. In multiple-device systems, either disable daisy chaining on all devices and
fish
each
individually, or disable daisy chaining on the last device only and
fish
the device at the beginning
of the chain.
Both methods of acknowledging service requests can be used interchangeably. It is usually
advantageous to use Mixed mode. For example, after receiving an interrupt and servicing it in the
normal manner, the host should read the Service Request Status register (SRSR) to see if other
requests are pending. If so, the host can acknowledge by reading the appropriate Request
Acknowledge register (RRAR, TRAR, and MRAR) and proceed to service the request. This avoids
the time required for the host to exit its interrupt routine, only to re-enter it immediately for the next
request.
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