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參數(shù)資料
| 型號(hào)： | M3455AGC-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52 |
| 文件頁(yè)數(shù)： | 100/150頁(yè) |
| 文件大小： | 1818K |
| 代理商： | M3455AGC-XXXFP |
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Rev.1.02
Nov 26, 2008
Page 51 of 146
REJ03B0224-0102
455A Group
(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 49. RESET pin input waveform and reset release timing
(2) Power-on reset
Reset can be automatically performed at power on (power-on
reset) by the built-in power-on reset circuit. When the built-in
power-on reset circuit is used, set the time for the supply voltage
to rise from 0 V to the minimum voltage of recommended
operating conditions to 100
s or less.
If the rising time exceeds 100
s, connect a capacitor between
the RESET pin and Vss at the shortest distance, and input “L”
level to RESET pin until the value of supply voltage reaches the
minimum operating voltage.
(3) System reset instruction (SRST)
By executing the SRST instruction, “L” level is output to RESET
pin and system reset is performed.
Fig 50. Power-on reset operation
0.3VDD
0.85VDD
(Note 1)
Program starts
(address 0 in page 0)
Reset input
1 machine cycle or more
RESET
f(HSOCO)
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.
High-speed on-chip oscillator (internal oscillator) is
counted 1376 times (Note 2).
=
100
s or less
VDD (Note)
Power-on reset
circuit output
Internal reset signal
Note: Keep the value of supply voltage to
the minimum value or more of the
recommended operating conditions.
Reset
released
Reset
state
Power-on
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