CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
376
Figure 12-19. CPUDEC Request for Control Transfer (12/12)
(d) Control transfer (without data stage) (2/2)
Yes
Yes
IN token received?
No
Yes
SUCES = 1?
(UF0IS1)
No
INTUSB0B
active
Transmitting data of Null packet
Reading UF0ISn register
SUCES = 1 (UF0IS1)
E0INDT = 1 (UF0IS1)
SUCESC = 0 (UF0IC1)
E0INC = 0 (UF0IC1)
E0INDTC = 0 (UF0IC1)
E0INM = 0 (UF0IM1)
CPUDECM = 0 (UF0IM1)
E0INM = 1 (UF0IM1)
STGM = 1 (UF0IM1)
ACK received?
No
END
Request processing
N
Illegal processing
Remarks 1.
n = 0, 1
2.
♦
: Processing by hardware
electronic components distributor