Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1197 of 1513
Aug 12, 2011
Figure 21-24. CPUDEC Request for Control Transfer (3/12)
(b) Control transfer (read) (1/4)
CPUDEC = 1?
(UF0IS1)
E0IN = 1?
(UF0IS1)
Transmitting NAK
E0IN = 1
(UF0IS1)
FW request decode
E0INM = 1
(UF0IM1)
Yes
No
Yes
No
B
If return data greater than the FIFO size exists,
it is divided into FIFO size units and sequentially
written, starting from the lowest data byte.
INTUSBF0 active
Reading UF0ISn register
I
F
Illegal processing
Remarks 1. n = 0, 1
2. ♦: Processing by hardware