Renesas M16C Series User Manual

Universal Serial Bus
M30240 Group
Rev.1.00 Sep 24, 2003 Page 314 of 360
Figure 3.27: Initializing the USB Function Control Unit (1)
Clearing the Protect Register
001
Protect Register Address
PRCR 000A
16
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
Setting Frequency Synthesizer Related Registers
Frequency Synthesizer Multiply Register Address
FSM 03DD
16
00
16
to FF
16
possible
Frequency Synthesizer Prescaler Register Address
FSP 03DE
16
00
16
to FF
16
possible
001
Frequency Synthesizer Control Register Address
FSC 03DB
16
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)
10
0
0
Setting Protect Register
000
Protect Register Address
PRCR 000A
16
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
Setting Frequency Synthesizer Related Registers
Continued on next page
b7 b0
b7
b7 b0
b0
b7 b0
b7 b0
Frequency Synthesizer Divide Register Address
FSD 03DF
16
00
16
to FF
16
possible
b7 b0

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English