Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1219 of 1513
Aug 12, 2011
21.9.5 Processing after power application
The processing to be performed after power application differs depending on the configuration of the system. One
example is given below.
Figure 21-31. Example of Processing After Power Application/Power Failure (1/3)
(a) Processing after power application (1/2)
Yes
Resume detected?
No
START START
Controlling port
Note 2
Pull-up processing of
D+ inactive
Note 1
Pull-up processing
of D+ active
Note 1
Connection
Controlling port
Note 2
BUSRST = 1 (UF0IS0)
DFLT = 1 (UF0MODS)
Initialization of request
data register
Initialization of request data
register
: See Figure 21-15 Initialization
Settings of Request Data Register.
: See Figure 21-15 Initialization
Settings of Request Data Register.
(a)
Notes 1. Use one general-purpose port pin for the signal that controls switching of the pull-up resistor of the
USB bus.
2. The input mode or control mode of the general-purpose port pin allocated in Note 1 may be selected
as the default value. Note the active level of pull-up processing of D+ on power application.
Remark ♦: Processing by hardware