Datasheet
V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1163 of 1513
Aug 12, 2011
(13) UF0 device descriptor registers 0 to 17 (UF0DD0 to UF0DD17)
These registers store the value to be returned in response to the GET_DESCRIPTOR Device request.
These registers can be read or written in 8-bit units. However, data can be written to these registers only when
the EP0NKA bit is set to 1.
Cautions 1. To rewrite these registers, set the EP0NKA bit to 1 before reading the register contents, and
rewrite the register contents after confirming that the bit has been set, in order to prevent
conflict between a read access and a write access.
2. Use the value defined by USB Specification Ver. 2.0 and the latest Class Specification as the
set value.
UF0DDn
(n = 0 to 17)
5 3 2 1 After reset
0467
Undefined
Address
See Table 21-5.
Table 21-5. Mapping and Data of UF0 Device Descriptor Registers
Symbol Address Field Name Contents
UF0DD0 002001A2H bLength Size of this descriptor
UF0DD1 002001A4H bDescriptorType Device descriptor type
UF0DD2 002001A6H Value below decimal point of Rev. number of USB specification
UF0DD3 002001A8H
bcdUSB
Value above decimal point of Rev. number of USB specification
UF0DD4 002001AAH bDeviceClass Class code
UF0DD5 002001ACH bDeviceSubClass Subclass code
UF0DD6 002001AEH bDeviceProtocol Protocol code
UF0DD7 002001B0H bMaxPacketSize0 Maximum packet size of Endpoint0
UF0DD8 002001B2H Lower value of vendor ID
UF0DD9 002001B4H
idVendor
Higher value of vendor ID
UF0DD10 002001B6H Lower value of product ID
UF0DD11 002001B8H
idProduct
Higher value of product ID
UF0DD12 002001BAH Lower value of device release number
UF0DD13 002001BCH
bcdDevice
Higher value of device release number
UF0DD14 002001BEH iManufacturer Index of string descriptor describing manufacturer
UF0DD15 002001C0H iProduct Index of string descriptor describing product
UF0DD16 002001C2H lSerialNumber Index of string descriptor describing device serial number
UF0DD17 002001C4H BNumConfigurations Number of settable configurations