Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1151 of 1513
Aug 12, 2011
21.6.5 EPC request data registers
(1) UF0 device status register L (UF0DSTL)
This register stores the value that is to be returned in response to the GET_STATUS Device request.
This register can be read or written in 8-bit units.
The hardware automatically transmits the contents of this register to the host when it has received the
GET_STATUS Device request.
Caution To rewrite this register, 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.
0UF0DSTL 0
5
00
3
0
2
0
1
RMWK SFPW
Address
00200144H
After reset
00H
0467
Bit position Bit name Function
1 RMWK
This bit specifies whether the remote wakeup function of the device is used.
1: Enabled
0: Disabled
If the device supports a remote wakeup function, this bit is set to 1 by hardware when the
SET_FEATURE Device request has been received, and is cleared to 0 by hardware when
the CLEAR_FEATURE Device request has been received. If the device does not support
a remote wakeup function, make sure that the SET_FEATURE Device request is not
issued from the host.
0 SFPW
This bit indicates whether the device is self-powered or bus-powered.
1: Self-powered
0: Bus-powered