Renesas M16C Series - Page 343

Universal Serial Bus
M30240 Group
Rev.1.00 Sep 24, 2003 Page 325 of 360
Figure 3.38: Initializing the USB Resume interrupt (2)
Checking the Frequency Synthesizer Locked State Bit
0
1
Frequency Synthesizer Control Register Address
FSC 03DC
16
Frequency Synthesizer Locked State Bit
0 : Unlocked State (Note)
1 : Locked (Frequency Synthesizer Stable)
b7
b0
10
0
Enable the USB Clock
Note: After setting bit 5, bit 3 should be initialized after waiting one Φ cycle.
Bit 6 should be initialized as needed.
Continued from previous page
Note: Recheck after waiting 0.1 ms until it becomes "1".
1
Wait 4 cycles
001
USB Control Register Address
USBC 000C
16
USB Clock Enable Bit
1 : Enable 48 MHz Clock
b7 b0
011
Clearing the USB Resume Signal Interrupt Status Flag
USB Interrupt Status Register 2 Address
USBIS2 0303
16
Resume interrupt status flag
0 : Interrupt not requested
b7 b0
REIT Command Execution
Transceiver voltage converter high/low current mode selection
0 : High current mode
b7 b0
Change DC-DC current mode
USB Control Register Address
USBC 000C16
0
0