參數(shù)資料
型號: ISD-300A1
英文描述: Universal Serial Bus
中文描述: 通用串行總線
文件頁數(shù): 34/67頁
文件大小: 580K
代理商: ISD-300A1
ISD-300A1
29
October 19, 2001
ATA Initialization Timeout
ISD-300A1 internal ROM has a default configuration value of 8.2 seconds for ATA Initialization Timeout.
When I_MODE operation is utilized, the default ATA Initialization Timeout value is used to retrieve FBh
data. Once the vendor specific Identify (FBh) command completes, the default value is overridden with the
FBh data value.
If an I
2
C memory device is utilized for ISD-300A1 configuration and USB descriptor data, the ATA
Initialization Timeout value is loaded from the I
2
C memory device prior to any ATA interface activity.
Reset Recovery is 3 ms.
Figure 2
graphically defines “Initialization Timeout” and “Reset Recovery”.
reset assertion
reset recovery
ATA_NRESET
initialization
timeout
nDIOR/nDIOW
Figure 2 – ATA Reset Protocol
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