參數(shù)資料
型號: M306H3FCFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP116
封裝: 20 X 20 MM, 0.65 MM PITCH, PLASTIC, LQFP-116
文件頁數(shù): 87/135頁
文件大?。?/td> 2583K
代理商: M306H3FCFP
Rev.1.00
2004.03.23
page 55 of 320
M306H3MC-XXXFP/FCFP
2.5.4 System Clock Protective Function
When the main clock is selected for the CPU clock source, this function disables the clock against modi-
fications in order to prevent the CPU clock from becoming halted by run-away.
If the PM21 bit of PM2 register is set to “1” (clock modification disabled), the following bits are protected
against writes:
CM02, CM05, and CM07 bits in CM0 register
CM10, CM11 bits in CM1 register
Before the system clock protective function can be used, the following register settings must be made
while the CM05 bit of CM0 register is “0” (main clock oscillating) and CM07 bit is “0” (main clock selected
for the CPU clock source):
(1) Set the PRC1 bit of PRCR register to “1” (enable writes to PM2 register).
(2) Set the PM21 bit of PM2 register to “1” (disable clock modification).
(3) Set the PRC1 bit of PRCR register to “0” (disable writes to PM2 register).
Do not execute the WAIT instruction when the PM21 bit is “1”.
相關(guān)PDF資料
PDF描述
M306H5MG-XXXFP 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP116
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M306H3FCFP#U0 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 128KB FLASH 5V 116LQFP - Trays
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