Fujitsu MB90335 Series Hardware Manual page 239

CHAPTER 11 USB FUNCTION
11.3 Registers of USB Function
[bit8, bit7] Reserved bits
These bits are reserved bits. Writing has no effect on the operation. Reading is undefined.
[bit6 to bit0] SIZE: Packet size display bit
When OUT packets have been transferred from EP0, the number of data bytes that has been written into
the receive buffer is displayed. The SIZE bit is updated to a valid value when the interrupt factor for
DRQO in the EP0O status register (EP0OS) has been set.
<Example> 8 bytes → "08
218
", 64 bytes → "40
H
FUJITSU MICROELECTRONICS LIMITED
MB90335 Series
" (maximum value)
H
CM44-10137-6E