ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 21

• 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
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
0x28
0x29
0x2A
0x2B
Number)
Address
Address
Address
(Config.
Table 5 – Device Descriptor
Table 6 – Device Qualifier Descriptor
0x2C(1)
0x2D(1)
0x80(2)
0x81(2)
Device Qualifier Descriptor
The device qualifier descriptor describes information about a high-speed capable device that
would change if the device were operating at the other speed. For the ISD-300A1, none of the
descriptor information requires modification, thus only one Device Qualifier Descriptor is
required. The ISD-300A1 returns the same descriptor while operating in either full speed or high
speed mode.
Standard Configuration Descriptor
The ISD-300A1 requires two configuration descriptors. The first configuration is returned when
the VBUS_POWERED signal is active, the second configuration when the VBUS_POWERED
signal is inactive (brick powered). The configuration descriptor contains information about the
ISD-300A1 device configuration. Each configuration has one interface that supports four
endpoints. See the VBUS_POWERED section on page 38 for more information.
bcdDevice (MSB)
iManufacturer
iProduct
iSerialNumber
bNumConfigurations
bLength
bDescriptor Type
bcdUSB (LSB)
bcdUSB (MSB)
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
bNumConfigurations
bReserved
bLength
bDescriptorType
Field Name
Field Name
Field Name
Device release number in BCD MSB (silicon release number). NOTE: This
field entry is always returned from internal ROM contents, regardless of the
descriptor source.
Index to manufacturer string. This entry must equal half of the address value
where the string starts or 0 if the string does not exist.
Index to product string. This entry must equal half of the address value where
the string starts or 0 if the string does not exist.
Index to serial number string. This entry must equal half of the address value
where the string starts or 0 if the string does not exist. The USB Mass Storage
Class Bulk Only Transport Specification requires a unique serial number.
Number of configurations supported.
Length of device descriptor in bytes.
Descriptor type.
USB Specification release number in BCD.
Device class.
Device subclass.
Device protocol.
USB packet size supported for default pipe.
Number of configurations supported
Reserved for future use, must be zero
Length of configuration descriptor in bytes.
Descriptor type.
16
Description
Description
Description
ISD-300A1
0x10
0x11
On-board
On-board
On-board
Defaults
Defaults
Defaults
0x5A
0x0A
0x49
0x00
0x01
0x06
0x00
0x02
0xFF
0x00
0xFF
0x40
0x01
0x00
0x09
0x02
(300A)
(300A1)