m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 154

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.8.17. Initialization procedure of frequency synthesizer and USB function control unit (1)
b7
Setting frequency synthesizer related registers
Setting the protect
b7
Checking the frequency synthesizer locked status bit
Clearing the protect
Setting frequency synthesizer control register
b7
b7
b7
It is necessary to recheck after a wait of 0.1ms if it is “0”.
b7
1
1
0
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0
0
0
0
0
0
0
0
0
0
b0
b0
b0
0
1
b0
b0
1
Frequency synthesizer multiplier
FSM [Address 03DD
00
b0
Enable bit for writing to system clock control registers 0 and 1
and frequency synthesizer related registers
Enable bit for writing to processor mode registers 0 and 1
Reserved bit
Enable bit for writing to system clock control registers 0 and 1
and frequency synthesizer related registers
Enable bit for writing to processor mode registers 0 and 1
Reserved bit
16
Frequency Synthesizer enable bit
VCO gain control bit
Reserved bit
LPF current control bit (Note)
Frequency synthesizer control register [Address 03DC
FSC
Protect register [Address 000A
PRCR
Protect register [Address 000A
PRCR
b2 b1
b6 b5
0 : Write-inhibited
0 : Write-inhibited
Frequency synthesizer prescaler
FSP [Address 03DE
00
1 : Write-enabled
0 : Write-inhibited
1 : Enabled
0 0 : Lowest gain
0 1 : Low gain
1 0 : High gain (Recommended)
1 1 : Highest gain
0 0 : Disabled
0 1 : Low current
1 0 : Medium current (Recommended)
1 1 : High current
to FF
Frequency synthesizer lock status bit
Frequency synthesizer control register [Address 03DC
FSC
16
0 : Unlocked
1 : Locked (Frequency synthesizer stabilized)
to FF
Continued to the next page
16
Initialization of USB FCU
can be set
16
can be set
Wait for 3ms
16
]
16
]
16
16
b7
Note: If the time for locking frequency synthesizer
]
]
is needed, first, set to “11
and set to “10
after it locked.
2
” (Medium current)
b0
16
00
Frequency synthesizer
divider
FSD [Address 03DF
]
16
16
]
to FF
2
” (High current),
16
can be set
16
2. USB function
]