參數(shù)資料
型號: M37540E8FP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁數(shù): 37/88頁
文件大?。?/td> 872K
代理商: M37540E8FP
7540 Group
Rev.4.00
Jun 21, 2004
page 42 of 82
REJ03B0011-0400Z
Reset Circuit
The microcomputer is put into a reset status by holding the RE-
SET pin at the “L” level for 2
s or more when the power source
voltage is 2.2 to 5.5 V and XIN is in stable oscillation.
After that, this reset status is released by returning the RESET pin
to the “H” level. The program starts from the address having the
contents of address FFFD16 as high-order address and the con-
tents of address FFFC16 as low-order address.
In the case of f(
φ) ≤ 6 MHz, the reset input voltage must be 0.9 V
or less when the power source voltage passes 4.5 V.
In the case of f(
φ) ≤ 4 MHz, the reset input voltage must be 0.8 V
or less when the power source voltage passes 4.0 V.
In the case of f(
φ) ≤ 2 MHz, the reset input voltage must be 0.48 V
or less when the power source voltage passes 2.4 V.
In the case of f(
φ) ≤ 1 MHz, the reset input voltage must be 0.44 V
or less when the power source voltage passes 2.2 V.
Fig. 43 Example of reset circuit
Fig. 44 Timing diagram at reset
(Note)
0.2 VCC
0 V
Poweron
VCC
RESET
VCC
RESET
Power source
voltage
detection circuit
Power source
voltage
Reset input
voltage
Note : Reset release voltage Vcc = 2.2 V
Data
Address
8-13 clock cycles
Reset address from the
vector table
1 : An on-chip oscillator applies about RING2 MHz,
φ250 kHz frequency clock
at average of Vcc = 5 V.
2 : The mark “?” means that the address is changeable depending on the previous state.
3 : These are all internal signals except RESET.
Notes
??
FFFC
FFFD
ADH,ADL
??
?
??
ADL
ADH
??
?
Clock from on-chip
oscillator RING
φ
RESET
RESETOUT
SYNC
相關(guān)PDF資料
PDF描述
M37540M2-XXXGP 8-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO36
M37540M4V-XXXFP 8-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32
M37540M2T-XXXGP 8-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO36
M37540E8GP 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO36
M37540M4-XXXSP 8-BIT, MROM, 6 MHz, MICROCONTROLLER, PDIP32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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