Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1088 of 1513
Aug 12, 2011
(2/2)
Bit position Bit name Function
1 EP0W
This bit indicates that data is in the UF0E0W register (FIFO). By setting the E0DED bit of
the UF0DEND register to 1, the status in which data is in the UF0E0W register can be
created even if data is not written to the register (Null data transmission). As soon as the
E0DED bit of the UF0DEND register is set to 1 even when the counter of the UF0E0W
register is 0, this bit is set to 1 by hardware. It is cleared to 0 after correct transmission.
1: Data is in the register.
0: No data is in the register (default value).
0 EP0R
This bit indicates that data is in the UF0E0R register (FIFO). It is automatically cleared to
0 by hardware when reading the UF0E0R register (FIFO) has been completed (counter
value = 0). It is not set to 1 if Null data is received.
1: Data is in the register.
0: No data is in the register (default value).