ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 60

• 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
Address
0xC
SYS_IRQ
DISK_READY
ATA Translation Enable
ATA UDMA Enable
ATAPI UDMA Enable
ROM UDMA Mode
Field Name
Bits(7) – read only
This bit reflects the current logic state of the SYS_IRQ input.
Bit(6) – read only
This bit reflects the current logic state of the DISK_READY input.
Bit(5)
Enable ATAPI to ATA protocol translation enable. If enabled, AND if an
ATA device is detected, ATA translation is enabled. Note: If Skip
ATA/ATAPI Device Initialization is set ‘1’, Force ATA Device must also be
set ‘1’ in order to utilize ATA translation. Software must further issue an
INQUIRY command followed with an MSC reset to enable ATA translation
operation.
0
1
Bit(4)
Enable Ultra Mode data transfer support for ATA devices. If enabled,
AND the ATA device reports UDMA support, the ISD-300A1 will utilize
UDMA data transfers.
0
1
Bit(3)
Enable Ultra Mode data transfer support for ATAPI devices. If enabled,
AND the ATAPI device reports UDMA support, the ISD-300A1 will
utilize UDMA data transfers.
0
1
Bits(2:0)
ROM UDMA Mode indicates the highest UDMA mode supported by the
product. The ISD-300A1 will utilize the lesser of ROM UDMA Mode or
the highest mode supported by the device. Note: UDMA read operation
mode timing is controlled by the device.
mode 0
mode 1
mode 2
mode 3
mode 4
ATA Translation Disabled
ATA Translation Enable
Disable ATA device UDMA support
Enable ATA device UDMA support
Disable ATAPI device UDMA support
Enable ATAPI device UDMA support
000
001
010
011
100
133.3 ns per 16-bit word write
100 ns per 16-bit word write
66.7 ns per 16-bit word write
66.7 ns per 16-bit word write
33.3 ns per 16-bit word write
55
Description
ISD-300A1
Example
SROM
Data
0x32