參數(shù)資料
型號: M34571G6FP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO24
封裝: 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24
文件頁數(shù): 60/126頁
文件大?。?/td> 1776K
代理商: M34571G6FP
Rev.1.02
May 25, 2007
Page 39 of 124
REJ03B0179-0102
4571 Group
RESET FUNCTION
System reset is performed by the followings:
“L” level is applied to the RESET pin externally,
System reset instruction (SRST) is executed,
Reset occurs by watchdog timer,
Reset occurs by built-in power-on reset
Reset occurs by voltage drop detection circuit
Then when “H” level is applied to RESET pin, software starts
from address 0 in page 0.
(1) RESET pin input
System reset is performed certainly by applying “L” level to
RESET pin for 1 machine cycle or more when the following
condition is satisfied;
the value of supply voltage is the minimum value or more of the
recommended operating conditions.
Fig 40. Structure of reset pin and its peripherals
Fig 41. RESET pin input waveform and reset release timing
Power-on reset circuit
Watchdog reset signal
WEF
SRST instruction
Internal reset signal
(Note 1)
RESET pin
(Note 2)
Pull-up transistor
Voltage drop detection circuit
(Note 1)
Notes 1:
This symbol represents a parasitic diode.
2: Applied potential to RESET pin must be VDD or less.
0.3VDD
0.85VDD
(Note 1)
Program starts
(address 0 in page 0)
Reset input
1 machine cycle or more
RESET
f(RING)
Notes 1: Keep the value of supply voltage to the minimum value or more of the
recommended operating conditions.
2: It depends on the internal state at reset.
XIN input is counted 5400 to 5424 times (Note 2).
=
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