參數(shù)資料
型號: μPD784216
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位單片微控制器)
中文描述: 8 / 16位單片機(jī)微控制器(8 / 16位單片微控制器)
文件頁數(shù): 54/88頁
文件大?。?/td> 427K
代理商: ΜPD784216
μ
PD784214,784215,784216
54
11. RESET FUNCTION
When a low-level signal is input to the RESET pin, the system is reset, and each hardware unit is initialized (reset).
During the reset period, oscillation of the main system clock is unconditionally stopped. Consequently, the current
consumption of the entire system can be reduced.
When the RESET signal goes high, the reset status is cleared, oscillation stabilization time (84.0 ms at 12.5-MHz
operation) elapses, the contents of the reset vector table are set to the program counter (PC), execution branches
to an address set to the PC, and program execution is started from that branch address. Therefore, the program
can be reset and started from any address.
Figure 11-1. Oscillation of Main System Clock during Reset Period
The RESET input pin has an analog delay noise rejection circuit to prevent malfunctioning due to noise.
Figure 11-2. Acknowledgement of Reset Signal
Analog delay
Analog delay
Analog
delay
Oscillation
stabilization
time
RESET input
Internal reset signal
Internal clock
Oscillation is unconditionally
stopped during reset period.
Oscillation stabilization time
Main system clock
oscillator
f
CLK
RESET input
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