參數(shù)資料
型號(hào): M38039GCHKP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù): 67/103頁(yè)
文件大?。?/td> 1412K
代理商: M38039GCHKP
REJ03B0166-0113 Rev.1.13
Aug 21, 2009
Page 66 of 100
3803 Group (Spec.H QzROM version)
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an “L”
level for 16 cycles or more of XIN. Then the RESET pin is
returned to an “H” level (the power source voltage should be
between 1.8 V and 5.5 V, 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 0.29 V for VCC of 1.8 V.
Fig 61. Reset circuit example
Fig 62. Reset sequence
VCC
RESET
VCC
RESET
Power source voltage
detection circuit
Example at VCC = 5 V
1.8 V
0 V
VCC
RESET
0.29 V or less
RESET
Internal
reset
Data
φ
Address
SYNC
XIN
?
FFFC
FFFD
ADH,L
?
?ADL
ADH
Notes 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.
XIN : 10.5 to 18.5 clock cycles
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