NEC mPD78F0730 Preliminary User's Manual page 335

Status of
UF0BI1 register
SIE
CPU
BKI1NK bit of
UF0EN register
BKI1DT
UF0IS2
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CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Figure 12-6. Operation of UF0BI1 Register (3/3)
Transmission
completed
side
FIFO_0
FIFO_1
side
FIFO
clear
64-byte transfer
bit of
register
(c) Operation example 3
Transmission
completed
FIFO toggle
ACK Transmission ACK
reception starts reception
FIFO_1
FIFO_0
Writing
FIFO
starts
Transfer of Null packet
BKI1DED bit of
UF0DEND register is set.
INT clear
(FW clear)
Preliminary User's Manual U19014EJ1V0UD
FIFO toggle
FIFO_0
FIFO_1
Writing
FIFO
completed
Short packet transfer
BKI1DED bit of
UF0DEND register is set.
Hardware clear
335