參數(shù)資料
型號: M34518M2-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁數(shù): 97/157頁
文件大?。?/td> 1783K
代理商: M34518M2-XXXFP
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 3
Reset Function
3 – 3
3.3
Description of Operation
3.3.1
Operation of System Reset Mode
System reset has the highest priority among all the processings and any other processing being executed up to then is
cancelled.
The system reset mode is set by any of the following causes.
Reset by the RESET_N pin
Reset by power-on detection
Reset by low-speed oscillation stop detection (Not available on ML610Q415)
Reset by watchdog timer (WDT) overflow
Software reset by the BRK instruction (only the CPU is reset)
In system reset mode, the following processing is performed.
(1) The power circuit is initialized, but not initialized by the reset by the BRK instruction execution. For the details of
the power circuit, refer to Chapter 28, “Power Circuit”.
(2) All the special function registers (SFRs) whose initial value is not undefined are initialized. However, the
initialization is not performed by software reset due to execution of the BRK instruction. See Appendix A
“Registers” for the initial values of the SFRs.
(3) CPU is initialized.
All the registers in CPU are initialized.
The contents of addresses 0000H and 0001H in the program memory are set to the stack pointer (SP).
The contents of addresses 0002H and 0003H in the program memory are set to the program counter (PC).
However, when the interrupt level (ELEEVL) of the program status word (PSW) at reset by the BRK instruction
is 1 or lower, the contents of addresses 0004H and 0005H of the program memory are set in the program counter
(PC).
For the BRK instruction, see “nX-U8/100 Core Instruction Manual”.
Note:
In system reset mode, the contents of data memory and those of any SFR whose initial value is undefined are not
initialized and are undefined. Initialize them by software.
In system reset mode by the BRK instruction, no special function register (SFR) that has a fixed initial value is
initialized either. Therefore initialize such an SFR by software.
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相關(guān)代理商/技術(shù)參數(shù)
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M34518M2-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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