NXP Semiconductors LPC1311 User Manual

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User manual Rev. 3 — 14 June 2011 176 of 368
NXP Semiconductors
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Chapter 11: LPC13xx USB on-chip drivers
11.6.2 Mass storage configuration, interface, and endpoint descriptors
The USB driver reports the following descriptors during the enumeration process for a
MSC device:
11.6.3 HID configuration, interface, class, endpoint, and report descriptor
The USB driver reports the following descriptors during the enumeration process for an
HID device:
Table 190. Mass storage descriptors
Field Value Description
Mass storage configuration descriptor
bLength 0x09 Descriptor size in bytes
bDescriptorType 0x02 The constant Configuration (0x02)
wTotalLength 0x0020 Size of all data returned for this configuration in bytes
bNumInterfaces 0x01 Number of interfaces the configuration supports
bConfigurationValue 0x01 Identifier for Set_Configuration and Get_Configuration
requests
iConfiguration 0x00 Index of string descriptor for the configuration
bmAttributes 0xc0 Self/Bus power, Remote wakeup
bMaxPower 0x32 Bus Power required, expressed as (max mA/2)
Mass storage interface descriptor
bLength 0x09 Descriptor size in bytes
bDescriptorType 0x04 The constant Interface (0x04)
bInterfaceNumber 0x00 Number identifying this interface
bAlternateSetting 0x00 Value used to select an alternate setting
bNumEndpoints 0x02 Number of endpoints supported
bInterfaceClass 0x08 Class code, Storage
bInterfaceSubClass 0x06 SubClass code, SCSI
bInterfaceProtocol 0x50 Protocol code, Bulk only
iInterface 0x62 Index of string descriptor for the interface
Mass storage bulk IN endpoint descriptor
bLength 0x07 Descriptor size in bytes
bDescriptorType 0x05 The constant Endpoint (0x05)
bEndpointAddress 0x82 Endpoint number and direction
bmAttributes 0x02 Transfer type supported, Bulk
wMaxPacketSize 0x0040 Maximum packet size supported
bInterval 0x00 Maximum latency/polling interval/NAK rate
Mass storage bulk OUT endpoint descriptor
bLength 0x07 Descriptor size in bytes
bDescriptorType 0x05 The constant Endpoint (0x05)
bEndpointAddress 0x02 Endpoint number and direction
bmAttributes 0x02 Transfer type supported, Bulk
wMaxPacketSize 0x0040 Maximum packet size supported
bInterval 0x00 Maximum latency/polling interval/NAK rate

NXP Semiconductors LPC1311 Specifications

General

Brand	NXP Semiconductors
Model	LPC1311
Category	Controller
Language	English