LAN9730 Datasheet, PDF (39/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
4.3.1.6.7 Other Speed Configuration Descriptor
The fields in this descriptor are derived from Configuration Descriptor information that is stored in the EEPROM.
TABLE 4-10: OTHER SPEED CONFIGURATION DESCRIPTOR
Offset
00h
01h
02h
04h
05h
06h
07h
08h
Field
bLength
bDescriptorType
Size
(Bytes)
1
1
Default Value
09h
07h
wTotalLength
2
0027h
bNumInterfaces
1
01h
bConfigurationValue 1
01h
iConfiguration
1
00h
bmAttributes
1
A0h
bMaxPower
1
Note 4-12
Loaded from
EEPROM
Description
Note 4-11
Note 4-11
Note 4-11
Note 4-11
Note 4-11
Yes
Yes
Yes
Size of descriptor in bytes (9 bytes)
Other Speed Configuration Descrip-
tor (0x07)
Total length in bytes of data returned
(39 bytes)
Number of interfaces
Value to use as an argument to select
this configuration
Index of String Descriptor describing
this configuration
Bus powered and remote wakeup
enabled.
Maximum power consumption is
500 mA.
Note: EEPROM values are obtained for the Configuration Descriptor at the other USB speed. I.e., if the current
operating speed is FS, then the HS Configuration Descriptor values are used, and vice-versa.
Note 4-11
Note 4-12
Value is loaded from EEPROM, but must be equal to the default value in order to comply with the USB
2.0 Specification and provide for normal device operation. Specification of any other value will result
in unwanted behavior and untoward operation.
Default value is 01h in Self-Powered mode and FAh in Bus-Powered mode.
Note: The RMT_WKP strap affects the default value of bmAttributes.
4.3.1.6.8 Device Qualifier Descriptor
The fields in this descriptor are derived from Device Descriptor information that is stored in the EEPROM.
TABLE 4-11: DEVICE QUALIFIER DESCRIPTOR
Offset
Field
00h bLength
01h bDescriptorType
02h bcdUSB
04h bDeviceClass
05h bDeviceSubClass
06h bDeviceProtocol
07h bMaxPacketSize0
08h bNumConfigurations
09h Reserved
Size
(Bytes)
1
1
2
1
1
1
1
1
1
Default Value
0Ah
06h
0200h
FFh
00h
FFh
40h
01h
00h
Loaded from
EEPROM
No
No
Note 4-13
Yes
Yes
Yes
Note 4-13
Note 4-13
No
Description
Size of descriptor in bytes (10 bytes)
Device Qualifier Descriptor (0x06)
USB Specification Number which
device complies to.
Class Code
Subclass Code
Protocol Code
Maximum packet size
Number of Other Speed Configura-
tions
Must be zero
 2012-2015 Microchip Technology Inc.
DS00001946A-page 39