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参数资料
| 型号： | M37544G2SP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件页数： | 27/68页 |
| 文件大小： | 738K |
| 代理商： | M37544G2SP |
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7544 Group
Rev.1.04
2004.06.08
page 33 of 66
REJ03B0012-0104Z
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 4.5 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) ≤ 8 MHz, the reset input voltage must be 0.9 V
or less when the power source voltage passes 4.5 V.
Fig. 37 Example of reset circuit
Fig. 38 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 4.5V
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
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相关代理商/技术参数 |
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| M37544M2-XXXGP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37544M2-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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| M37544RSS | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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