Renesas M16C Series User Manual

Universal Serial Bus
M30240 Group
Rev.1.00 Sep 24, 2003 Page 322 of 360
Figure 3.35: Initializing the USB Suspend interrupt (2)
Setting the USB Control Register
001
USB Control Register Address
USBC 000C
16
USB Transceiver Voltage Converter Current Mode Selection bit
1 : Low current mode
USB Clock Enable Bit
0 : Disable 48 MHz Clock Supply
Clearing Protect Register
0
1
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
b7 b0
00
Note: After setting bit 3, bit 5 should be established after waiting one cycle of the Φ.
Total Drive Curent < 500µA
Suspend Interrupt Processing Routine
Setting the Frequency Synthesizer Control Register
0
0
Frequency Synthesizer Control Register Address
FSC 03DC
16
Frequency Synthesizer Enable bit
0 : Disabled
b7 b0
100
Setting the Interrupt Control Register
0
USB Resume Interrupt Control Register Address
RSMIC 0046
16
Interrupt Priority Level Selection bit
b2 b1 b0
0 0 0 : Level 0 (Interrupt disabled)
0 0 1 : Level 1
0 1 0 : Level 2
0 1 1 : Level 3
1 0 0 : Level 4
1 0 1 : Level 5
1 1 0 : Level 6
1 1 1 : Level 7
Interrupt Request Bit
0 : No interrupt requests
b7 b0
Note 1: The level of the resume interrupt priority should be higher than that of the USB Suspend Priority. In those events where
recovery from the suspend mode is by (interruptions by means such as keyboard entry) of interrupts other than USB
Resume Interrupt, the priority level of the interrupt used should be higher a level than that of the USB Suspend Interrupt.
Note 2: Any requisite interrupt that should not exit the Stop Mode should be disabled by setting the priority level to "0".

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English