Renesas M16C Series User Manual page 159

M30240 Group
(1) Clearing the protect (set to write-enabled state)
b7
(2)
(3) Setting the protect (set to write-inhibited state)
b7
(4) Clearing the protect (set to write-enabled state)
b7
(5)
(6) Setting the protect (set to write-inhibited state)
b7
Figure 2.2: Set-up procedure for protect function
Rev.1.00 Sep 24, 2003 Page 141 of 360
b0
Protect register [Address 000A
0
1
PRCR
Enables writing to system clock control registers 0 and 1 (addresses 0006
and frequency synthesizer registers (address 03DB
1 : Write-enabled
Enables writing to processor mode registers 0 and 1
0 : Write-inhibited
1 : Write-enabled
Reserved bit
Set system clock control register 0 and 1 and frequency synthesizer registers
b0
Protect register [Address 000A
0 0
PRCR
Enables writing to system clock control registers 0 and 1 (addresses 0006
and frequency synthesizer registers (address 03DB
0 : Write-inhibited
Enables writing to processor mode registers 0 and 1
0 : Write-inhibited
1 : Write-enabled
Reserved bit
b0
Protect register [Address 000A
0
1
PRCR
Enables writing to system clock control registers 0 and 1 (addresses 0006
and frequency synthesizer registers (address 03DB
0 : Write-inhibited
1 : Write-enabled
Enables writing to processor mode registers 0 and 1
1 : Write-enabled
Reserved bit
Set processor mode register 0 and 1
b0
Protect register [Address 000A
0 0
PRCR
Enables writing to system clock control registers 0 and 1 (addresses 0006
and frequency synthesizer registers (address 03DB
0 : Write-inhibited
1 : Write-enabled
Enables writing to processor mode registers 0 and 1
0 : Write-inhibited
Reserved bit
]
16
to 03DF ).
16 16
]
16
to 03DF ).
16 16
]
16
to 03DF ).
16 16
]
16
to 03DF ).
16 16
Protect
)
and 0007
16 16
)
and 0007
16 16
)
and 0007
16 16
)
and 0007
16 16