參數(shù)資料
型號(hào)： M37534E8SP
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù)： 28/55頁(yè)
文件大?。?/td> 610K
代理商： M37534E8SP
7534 Group
Rev.2.00
Jun 21, 2004
page 34 of 54
REJ03B0099-0200Z
Reset Circuit
The microcomputer is put into a reset status by holding the RESET
pin at the “L” level for 15 s or more when the power source voltage
is 4.1 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 con-
tents of address FFFD16 as high-order address and the contents of
address FFFC16 as low-order address.
Note that the reset input voltage should be 0.82 V or less when the
power source voltage passes 4.1 V.
Fig. 40 Example of reset circuit
Fig. 41 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 = 4.1 V
Data
Address
8-13 clock cycles
Reset address from the
vector table
1 : An on-chip oscillator applies about 250 kHz frequency as clock f 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
φ
RESET
RESETOUT
SYNC
??
FFFCFFFD
ADH,ADL
??
?
??
ADL
ADH
??
?
Clock from on-chip
oscillator
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