NEC mPD78F0730 Preliminary User's Manual page 329

UF0BO1 register
BKO1NK bit of
UF0EN register
BKO1FL
UF0IS3
BKOUT1
UF0EPS0
BKO1DT
UF0IS3
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CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Figure 12-5. Operation of UF0BO1 Register (1/2)
Status of
SIE side
FIFO_0
FIFO_1
CPU side
Reading Reading
FIFO FIFO
starts completed
64-byte transfer
bit of
register
bit of
register
bit of
register
(a) Operation example 1
Reception
FIFO toggle
completed
ACK Reception
transmission starts
Reading
FIFO
starts
Transfer of data less
than 64 bytes
Preliminary User's Manual U19014EJ1V0UD
Reception
FIFO toggle
completed
ACK
transmission
FIFO_1
FIFO_0
Reading
FIFO
completed
64-byte transfer
FW clear
FIFO_0
FIFO_1
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