ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 47
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ISD-300A1
Manufacturer Part Number
ISD-300A1
Description
IC USB 2.0 BRIDGE BULK 100LQFP
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.ISD-300A1.pdf
(67 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISD-300A1
Manufacturer:
CYP
Quantity:
20 000
October 19, 2001
Figure 4 – SYS_IRQ – USB Interrupt Pipe
ATA_EN Pin – ATA Interface Disabled
The ATA_EN pin allows ATA bus sharing with other host devices. Asserting ATA_EN low causes the
ISD-300A1 to 3-state all ATA bus interface pins hi-Z and suspend ATA state machine activity, otherwise
leaving the ISD-300A1 operational (USB operation continues). Asserting ATA_EN high resumes normal
operation.
To disable USB operation and the ATA interface, the DRIVE_PWR_VALID signal can be used in
conjunction with ATA_EN to force the ISD-300A1 into a low power state until normal operation is
resumed.
ATA_PU_EN Pin – ATA Interface Pull-up Resistor Source
This output provides control for the required host pull-up resistors on the ATA interface. ATA_PU_EN is
3-stated hi-Z when ATA_EN is low.
ATA_PD_EN Pin – ATA Interface Pull-down Resistor Sink
This output provides control for the required host pull-down resistors on the ATA interface. ATA_PD_EN
is 3-stated hi-Z when ATA_EN is low.
NAK Request
No
Return Interrupt Data
Set Int_Data = 0
USB Interrupt
Int_Data = 1?
Pipe Polled?
Yes
Yes
No
42
Yes
No
Latch State of IO Pins
Set Int_Data = 1
SYS_IRQ=1?
SYS_IRQ=0?
Int_Data = 0
Yes
and
ISD-300A1
No