參數(shù)資料
型號(hào)： M30220FCGP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP144
封裝： 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁數(shù)： 84/161頁
文件大小： 0K
代理商： M30220FCGP
Mitsubishi microcomputers
M30220 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Protection
29
Figure 1.9.8. Protect register
Protect register
Symbol
Address
When reset
PRCR
000A16
XXXXXX002
Bit name
Bit symbol
b7
b6
b5
b4
b3
b2
b1
b0
0 : Write-inhibited
1 : Write-enabled
PRC1
PRC0
Enables writing to processor mode
registers 0 and 1 (addresses 000416
and 000516)
Function
0 : Write-inhibited
1 : Write-enabled
Enables writing to system clock
control registers 0 and 1 (addresses
000616 and 000716
)
W
R
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
Protection
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 1.9.8 shows the protect register. The values in the processor
mode register 0 (address 000416), processor mode register 1 (address 000516), system clock control reg-
ister 0 (address 000616), system clock control register 1 (address 000716) can only be changed when the
respective bit in the protect register is set to “1”.
The system clock control registers 0 and 1 write-enable bit (bit 0 at 000A16) and processor mode register 0
and 1 write-enable bit (bit 1 at 000A16) do not automatically return to “0” after a value has been written to an
address. The program must therefore be written to return these bits to “0”.
相關(guān)PDF資料
PDF描述
M30220MA-XXXGP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP144
M30220MA-XXXRP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP144
M30220MA-XXXRP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP144
M30220MA-XXXGP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP144
M30220FCGP 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP144
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參數(shù)描述
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