參數(shù)資料
型號: M38867M8A-XXXHP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80
封裝: 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件頁數(shù): 69/113頁
文件大?。?/td> 1871K
代理商: M38867M8A-XXXHP
56
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an "L"
level for 2
s or more. Then the RESET pin is returned to an "H"
level (the power source voltage should be between 2.7 V and 5.5
V (4.0 V to 5.5 V for flash memory version), and the oscillation
should be stable), reset is released. After the reset is completed,
the program starts from the address contained in address FFFD16
(high-order byte) and address FFFC16 (low-order byte). Make sure
that the reset input voltage is less than 0.54 V for VCC of 2.7 V. For
flash memory version, make sure that the reset input voltage is
less than 0.8 V for Vcc of 4.0 V.
Fig. 56 Reset sequence
Fig. 55 Reset circuit example
(Note)
0.2VCC
0V
Poweron
VCC
RESET
VCC
RESET
Power source
voltage detection
circuit
Power source
voltage
Reset input
voltage
Note : Reset release voltage ; Vcc=2.7 V
(Vcc = 4.0 V for flash memory version)
RESET
Internal
reset
Data
φ
Address
SYNC
XIN: 10.5 to 18.5 clock cycles
XIN
?
FFFCFFFD
ADH,L
?
ADL
ADH
1: The frequency relation of f(XIN) and f(
φ) is f(XIN)=8 f(φ).
2: The question marks (?) indicate an undefined state that depends on the previous state.
Reset address from the vector table.
Notes
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