ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 34

• Manufacturer Part Number: ISD-300A1
• Description: IC USB 2.0 BRIDGE BULK 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of ISD-300A1

• Applications: USB 2.0 to ATA/ATAPI Bridge
• Interface: ATA, ATAPI
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 100-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1459

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
Initialization Timeout value is loaded from the I
Reset Recovery is 3 ms. Figure 2 graphically defines “Initialization Timeout” and “Reset Recovery”.
Figure 2 – ATA Reset Protocol
2
C memory device is utilized for ISD-300A1 configuration and USB descriptor data, the ATA
ATA_NRESET
nDIOR/nDIOW
reset assertion
reset recovery
2
C memory device prior to any ATA interface activity.
29
initialization
timeout
ISD-300A1