ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 23

• 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
0x4A(HS)
0x4B(HS)
0x4C(HS)
0x4D(HS)
0x3E(HS)
0x5D(FS)
0x3F(HS)
0x40(HS)
0x41(HS)
0x42(HS)
0x43(HS)
0x44(HS)
0x45(HS)
0x46(HS)
0x47(HS)
0x48(HS)
0x49(HS)
0x6A(FS)
0x4E(HS)
0x6D(FS)
0x5E(FS)
0x5F(FS)
0x6B(FS)
0x6C(FS)
0x60(FS)
0x61(FS)
0x62(FS)
0x63(FS)
0x64(FS)
0x65(FS)
0x66(FS)
0x67(FS)
0x68(FS)
0x69(FS)
Address
Table 8 – Other Speed Configuration Descriptor(s)
(HS or
FS)
Interface Descriptor
This descriptor specifies the interface within a configuration. There are two interface descriptors
in the ISD-300A1, one for high speed, and one for full speed. Each interface contains four
endpoint descriptors: Default Control (no descriptor), Bulk out, Bulk in, and Interrupt.
Interface and endpoint descriptors cannot be directly accessed using the Get_Descriptor USB
command. However, interface and endpoint descriptors are always returned as part of the
configuration and other speed configuration descriptor. When the other speed configuration
descriptor is requested, the interface descriptor returned is dependent upon the USB bus speed
mode of operation. When operating in high speed, the full speed interface descriptor is returned
with the other speed configuration descriptor. When operating in full speed, the high speed
interface descriptor is returned with the other speed configuration descriptor.
Endpoint descriptors and addresses must be in the fixed order of the ISD-300A1 internal defaults:
Bulk-out first, then Bulk-in, followed by Interrupt.
bLength
bDescriptorType
bInterfaceNumber
bAlternateSettings
bNumEndpoints
bInterfaceClass
bInterfaceSubClass
bInterfaceProtocol
iInterface
bLength
bDescriptorType
bEndpointAddress
bmAttributes
wMaxPacketSize (LSB)
wMaxPacketSize
(MSB)
bInterval
bLength
Field Name
Length of interface descriptor in bytes.
Descriptor type.
Interface number.
Alternate settings
Number of endpoints
Interface class.
Interface subclass.
Interface protocol.
Index to first interface string. This entry must equal half of the address value
where the string starts or 0 if the string does not exist.
Length of this descriptor in bytes.
Endpoint descriptor type.
This is an Out endpoint, endpoint number 1.
This is a bulk endpoint.
Max data transfer size.
HS interval for polling (max NAK rate). Does not apply to FS bulk
endpoints.
Length of this descriptor in bytes.
USB Bulk Out Endpoint
USB Bulk In Endpoint
Interface Descriptor
18
Description
ISD-300A1
On-board
0x00 (HS)
0x02 (HS)
0x01 (HS)
0x40 (FS)
0x00 (FS)
0x00 (FS)
Defaults
0x09
0x04
0x00
0x00
0x03
0xFF
0x00
0xFF
0x00
0x07
0x05
0x01
0x02
0x07