Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1137 of 1513
Aug 12, 2011
(6) UF0 bulk-out 1 length register (UF0BO1L)
The UF0BO1L register stores the length of the data held by the UF0BO1 register.
This register is read-only, in 8-bit units. A write access to this register is ignored.
The UF0BO1L register always updates the received data length while it is receiving data. If the final transfer is
abnormal reception, the UF0BO1L register is cleared to 00H, and an interrupt request is not generated. Only if the
reception is normal, the interrupt request is generated, and FW can read as much data from the UF0BO1 register
as the value read from the UF0BO1L register. The value of the UF0BO1L register is decremented each time the
UF0BO1 register has been read.
BKO1L7UF0BO1L BKO1L6
5
BKO1L5 BKO1L4
3
BKO1L3
2
BKO1L2
1
BKO1L1 BKO1L0
Address
0020010AH
After reset
00H
0467
Bit position Bit name Function
7 to 0
BKO1L7 to
BKO1L0
These bits store the length of the data held by the UF0BO1 register.