upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 384

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

384
Remark
UF0BO1 register data is read
up to the value read by the
UF0BO1L register.
UF0BO1 register data is read
up to the value read by the
UF0BO1L register.
♦: Processing by hardware
Figure 12-23. Processing If More Data Than Expected by System Is Transmitted (2/2)
CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Data length other than 0?
Data length other than 0?
Reading UF0BO1 register
Reading UF0BO1 register
BKOUT1 = 0 (UF0EPS0)
such as Endpoint STALL
BKO1FL = 0 (UF0IS3)
BKO1DT= 0 (UF0IS3)
OUT token received?
Updating data length
of UF0BO1L register
Expected processing
INTUSB1B
BKO1NAKC = 0
BKO1NAK = 1?
BKO1NAK = 1
BKO1NKM = 0
NAK response
BKO1NK = 0
(UF0ENM)
(UF0IS3)
(UF0IS3)
(UF0IC3)
Preliminary User’s Manual U19014EJ1V0UD
(UF0EN)
END
I
Yes
Yes
No
No
active
Yes
Yes
No
No
Data length = Data length – 1
Data length = Data length – 1
Illegal processing
Next system sequence?
sequence processing
Expected system
BKO1NKM = 0
BKO1NK = 0
(UF0ENM)
(UF0EN)
END
Yes
No