參數(shù)資料
型號(hào)： M38C59GFHP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 6.25 MHz, MICROCONTROLLER, PQFP80
封裝： 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件頁數(shù)： 49/71頁
文件大小： 939K
代理商： M38C59GFHP
Rev.2.00
Nov 23, 2005
page 53 of 75
REJ03B0098-0200
38C5 Group (One Time PROM version)
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 VCC (min.) and 3.6 V,
and the quartz-crystal oscillator 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 meets VIL
spec. when a power source voltage passes VCC (min.).
Fig. 52 Reset sequence
Fig. 51 Reset circuit example
VIL spec.
0V
Poweron
VCC
RESET
VCC
RESET
Power source
voltage detection
circuit
Power source
voltage
Reset input
voltage
RESET
SYNC
ROSC
FFFC
FFFD
ADH, ADL
ADL
ADH
????
........
Internal
reset
Address
Data
System clock
φ
ROSC : about 32800 cycles
Notes
Reset address from
vector table
1: The frequency relation of f(XIN) and f(
φ) is f(ROSC) = 32 f(φ).
2: The question marks (?) indicate an undefined state.
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