Renesas M16C Series User Manual page 332

M30240 Group
Clearing the Protect Register
b7
Setting Frequency Synthesizer Related Registers
b7
b7
b7
Setting Frequency Synthesizer Related Registers
b7
1 0
Setting Protect Register
b7
Figure 3.27: Initializing the USB Function Control Unit (1)
Rev.1.00 Sep 24, 2003 Page 314 of 360
b0
Protect Register
0 0 1
PRCR
Write enable bit for system clock control registers 0 and 1 and frequency related registers
1 : Write enable
Write enable bit for Processor Mode Register 0 and 1
0 : Write disabled
Reserved bit
b0
Frequency Synthesizer Prescaler Register
FSP
00 to FF possible
16 16
b0
Frequency Synthesizer Multiply Register
FSM
00 to FF possible
16 16
b0
Frequency Synthesizer Divide Register
FSD
00 to FF possible
16 16
b0
Frequency Synthesizer Control Register
0 0 0 1
0
FSC
Frequency Synthesizer Enable Bit
1 : Enabled
VCO Gain Control Bit
b1 b0
0 0 : Minimum gain selected (recommended)
0 1 : Low gain
1 0 : High gain
1 1 : Maximum gain
Reserved Bit
LPF Current Control Bit
b1 b0
1 0 : Medium current (recommended)
Frequency Synthesizer Clock State Bit (Note)
0 : Unlocked
1 : Locked (Frequency Synthesizer stable)
b0
Protect Register
0 0 0
PRCR
Write enable bit for system clock control registers 1 and 2 and frequency related registers
0 : Write enable
Write enable bit for Processor Mode Register 1 and 2
0 : Write disabled
Reserved bit
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Address
000A
16
Address
03DE
Address
03DD
Address
03DF
Address
03DB
Address
000A
16
Universal Serial Bus
16
16
16
16