Renesas M30245 Series User Manual page 179

M30245 Group
Clearing the protect
b7
Setting frequency synthesizer control register
b7
0 0
Clearing the protect
b7
Wait till the frequency synthesizer stabilized
b7
1 0
Note: Check the frequency synthesizer lock status bit. It is necessary to recheck
after a wait of 0.1ms if it is "0".
Setting USB control register
b7
1 0 0
Figure 2.8.30. USB resume interrupt request processing routine
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Detection of USB resume interrupt request
b0
Protect register [Address 000A
0 1
PRCR
Enable bit for writing to system clock control registers 0 and 1
and frequency synthesizer related registers
1 : Write-enabled
b0
Frequency synthesizer control register [Address 03DC
1
FSC
Frequency Synthesizer enable bit
1 : Enabled
b0
Protect register [Address 000A
0
0
PRCR
Enable bit for writing to system clock control registers 0 and 1
and frequency synthesizer related registers
0 : Write-disabled
b0 Frequency synthesizer control register [Address 03DC
0
FSC
Frequency synthesizer lock status bit
0 : Unlocked
1 : Locked (Frequency synthesizer stabilized)
b0
USB control register [Address 000C
0 0 0
USBC
USB clock enable bit
1: Enable (Supply 48MHZ clock)
USB resume interrupt request process is complete
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Wait for 2ms
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2. USB function
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