CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
370
Figure 12-19. CPUDEC Request for Control Transfer (6/12)
(b) Control transfer (read) (4/4)
INTUSB0B
active
Reading UF0ISn register
Reading UF0ISn register
Transmitting ACK
INTUSB0B
active
CPUDECM = 0 (UF0IM1)
E0INM = 0 (UF0IM1)
Yes
STG = 1?
(UF0IS1)
No
Yes
SUCES = 1?
(UF0IS1)
No
STGM = 1
(UF0IM1)
SUCES = 1
(UF0IS1)
SUCESC = 0 (UF0IC1)
E0INC = 0 (UF0IC1)
END
J
Illegal processing
Illegal processing
Remarks 1.
n = 0, 1
2.
♦
: Processing by hardware
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