upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 327

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

UF0EPS0
UF0E0W register
UF0E0N register
UF0IS1
EP0NKW bit of
UF0EPS0
E0INDT
UF0E0W register
UF0E0N register
EP0W
UF0IS1
EP0NKW bit of
E0INDT
Status of
EP0W
register
register
bit of
bit of
Status of
register
register
bit of
bit of
Writing
starts
FIFO
(b) When Null packet or short packet is transmitted
FIFO FW
CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
clear
completed
Figure 12-4. Operation of UF0E0W Register
mission
Trans-
Writing
starts
Transmission
FIFO
16-byte transfer
starts
Preliminary User’s Manual U19014EJ1V0UD
Transfer of Null packet
FIFO full
(a) 16-byte transmission
E0DED bit of
UF0DEND
register is set.
completed
mission
Trans-
completed ACK
mission
Trans-
reception
ACK
reception
INT clear
(FW clear)
Hardware
clear
Hardware
clear
INT clear
(FW clear)
Writing
starts
FIFO
Writing
16-byte transfer
starts
FIFO
completed
mission
Trans-
Writing
Transmission
starts
Short packet transfer
FIFO
completed
starts
Writing
Hardware clear
FIFO
completed
mission
Trans-
FIFO full
Hardware clear
E0DED bit of
UF0DEND
register is set.
cannot be
received
ACK
completed ACK
mission
Trans-
Re-transfer
reloaded
Counter
mission
trans-
starts
Re-
reception
reception
ACK
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