CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
375
Figure 12-19. CPUDEC Request for Control Transfer (11/12)
(d) Control transfer (without data stage) (1/2)
D
Yes
STG = 1?
(UF0IS1)
No
Yes
IN token received?
No
E0DED = 1
(UF0DEND)
E0IN = 1 (UF0IS1)
STG = 1 (UF0IS1)
INTUSB0B
active
Reading UF0ISn register
EP0WC = 1
(UF0FIC0)
G
Request processing aborted
No
PROT = 1?
(UF0IS1)
Yes
IN token of status phase
N
Illegal processing
Remarks 1.
n = 0, 1
2.
♦
: Processing by hardware
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