ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 38

• 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 Command Flow
Figure 3 shows the flow of ATA commands, specifically the actions taken by the ISD-300A1 based upon
how the ATA Command Block is configured.
DEVICE_HEAD register unless
selected then no ATA registers
the ATACB DEVOverride bit is
are zero filled in the 8 bytes of
bmATACBRegisterSelect are
read. ATA registers not read
specify the value for the DEV
Note: If no ATA registers are
are written. The device shall
set
dCBWDataTransferLength
Note: Only ATA registers
BSY=0 and store ERR and DRQ
Poll ATA Alternate Status until
bit when writing the
Command Fail OR other command
Read registers selected in
bmATACBRegisterSelect.
must be set to 8.
returned data.
selected in
block specification assumed
set..
PollAltStat
Override
DONE
ATACB
bits.
clear
B
The device shall specify the value for the
bmATACBRegisterSelect with the
set
no
Latch bmATACBRegisterSelect
Perform ATA Device Selection.
Write ATA registers selected in
Latch bmATACBActionSelect
set
bATACBTaskFileWriteData
dCBWDataTransferLength
Latch TransferBlockSize
Set TransferLength =
33
DeviceSelection
TaskFileRead
DEV bit.
PollAltStat
Signature
wATACB
detected
Override
Override
ATACB
ATACB
ATACB
clear
clear
yes
Poll ATA Alternate Status until
clear
BSY=0 and store ERR and
set
DRQ bits.
A
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ISD-300A1