Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1216 of 1513
Aug 12, 2011
21.9.4 Suspend/Resume processing
How Suspend/Resume processing is performed differs depending on the configuration of the system. One example is
given below.
Figure 21-30. Example of Suspend/Resume Processing (1/3)
(a) Example of Suspend processing
RSUSPD = 1 (UF0IS0)
RSUM = 1 (UF0EPS1)
Yes
Suspend detected?
No
Yes
RSUSPD = 1?
(UF0IS0)
No
Yes
RSUM = 1?
(UF0EPS1)
No
START
END
INTUSBF0 active
Reading UF0ISn register
Reading UF0EPS1 register
FW Suspend processing
RSUSPDC = 0
(UF0IC0)
Setting stop mode
UFCKMSK register = 01H
Illegal processing
Illegal processing
Remarks 1. n = 0, 1
2. ♦: Processing by hardware