Renesas M16C Series User Manual

Universal Serial Bus
M30240 Group
Rev.1.00 Sep 24, 2003 Page 324 of 360
3.2.13 USB Resume Interrupt
If a resume signal is received from the host CPU while in the suspend mode, the USB Function Control
unit sets the USB Resume Signal Interrupt Status Flag of the USB Interrupt Status Register 2 (USBIS2)
and the USB Resume Signal Detection Flag of the USB Power Processing Register (USBPM) to “1”.
The USB Resume Interrupt Processing Routine should then be executed.
Figure 3.37 shows the procedures for establishing within the USB Resume Interrupt Processing
Routine.
Figure 3.37: Initializing the USB Resume interrupt (1)
Clearing the Protect Register
0
Protect Register Address
PRCR 000A
16
Enable writing to the System Clock Control Registers 0 and 1, and the Frequency
Synthesizer Related Register
1 : Writing Enabled
Continued on next page
b7 b0
Resume Interrupt Signal Routine
1
Disable Protect Register
0
Protect Register Address
PRCR 000A
16
Enable writing to the System Clock Control Registers 0 and 1, and the Frequency
Synthesizer Related Register
0 : Writing Disabled
b7 b0
0
Setting the Frequency Synthesizer Control Register
0
1
Frequency Synthesizer Control Register Address
FSC 03DC
16
Frequency Synthesizer Control Bit
1 : Enabled
b7 b0
100
2ms Wait
NOP
NOP
NOP
NOP

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English