m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 49

• Manufacturer Part Number: m30262f8gp
• Description: Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

Protection
Protection
Figure 1.8.9. Protect register
The protection function is provided so that the values in important registers cannot be changed in the event
that the program runs out of control. Figure 1.8.9 shows the protect register. The values in the processor
mode register 0 (address 0004
ister 0 (address 0006
ter (address 000C
025E
PWM control register 0 (address 0348
only be changed when the respective bit in the protect register is set to “1”. Therefore, important outputs
can be allocated to port P9.
Protect register
b7
16
b6
), timer B2 special mode register (039E
b5
Preliminary Specifications Rev. 0.9
b4
0
Specifications in this manual are tentative and subject to change.
b3
b2
16
b1
16
), processor mode register 2 (001E
), system clock control register 1 (address 0007
b0
Note: Writing a value to an address after 1 is written to this bit returns the bit
Bit symbol
Nothing is assigned.
In an attempt to write to these bits, write 0 . The value, if read, turns out to be
indeterminate.
Reserved bit
PRC0
PRC1
PRC2
PRC3
Symbol
PRCR
16
to 0 . Other bits do not automatically return to 0 and they must therefore
be reset by the program.
), processor mode register 1 (address 0005
Renesas Technology Corp.
Enables writing to VCR2 (address
001A
16
Enables writing to processor mode
registers 0,1 and 2 (addresses 000
4
special mode register (address
039E
registers 0 and 1 (addresses
0348
Enables writing to port P9 direction
register (address 03F3
Enables writing to system clock
control registers 0 and 1 (addresses
0006
detection register (address 000C
(address 025E
peripheral clock select register
16
) and three-phase PWM control register 1 (address 0349
,0005
16
16
16
16
) and D4INT (address 001F
), three-phase PWM control
and 0007
and 0349
16
16
), port P9 direction register (address 03F3
and 001E
Address
000A
Bit name
16
)
16
16
)
)
16
, oscillation stop
16
16
), timer B2
16
) (note)
), peripheral clock select register (address
XXX00000
When reset
16
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
),
)
0 : Write-inhibited
1 : Write-enabled
Must always set to "0"
16
0 : Write-inhibited
1 : Write-enabled
0 : Write-inhibited
1 : Write-enabled
0 : Write-inhibited
1 : Write-enabled
2
), oscillation stop detection regis-
16
), system clock control reg-
Function
M16C/26 Group
16
), three-phase
R
16
W
) can
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