參數(shù)資料
型號： M37547G4-XXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36
封裝： 8.40 X 15 MM, 0.80 MM PITCH, PLASTIC, SSOP-36
文件頁數(shù)： 50/97頁
文件大?。?/td> 1064K
代理商： M37547G4-XXXFP
REJ03B0156-0122
Rev.1.22
Mar 31, 2009
page 54 of 94
7547 Group
Fig. 66 Operation waveform diagram of power-on reset circuit
Fig. 67 Operation waveform diagram of low voltage detection circuit
VCC (Note)
1ms or les s
Power-on
Reset released
Internal reset signal
Reset
state
Note: Keep the value of supply voltage to the minimum value
or more of the recommended operating conditions.
Po
circuit output
wer-on reset
VCC
Reset voltage (Typ:1.90V)
Internal reset signal
Microcomputer starts operation
by the built-in on-chip oscillator.
Internal reset signal
SYNC
??
FFFC
FFFD
ADH,ADL
??
?
??
ADL
ADH
??
?
Address
Data
Reset address from the
vector table
On-chip oscillator
clock RING
Internal CPU clock φ
RESET
9 to 16 cycles of
internal CPU clock φ
Fig. 68 Timing diagram at reset
Power-on Reset Circuit
Reset can be automatically performed at power on (power-on re-
set) by the built-in power-on reset circuit.
In order to use the power-on reset circuit effectively, the time for
the supply voltage to rise from 0 V to 1.8 V must be set to 1 ms or
less.
____________
When the built-in power-on reset circuit is used, pull-up the RESET
pin to VCC.
Low voltage Detection Circuit
The built-in low voltage detection circuit is designed to detect a
drop in voltage and to reset the microcomputer if the power source
voltage drops below a set value (Typ.1.90 V).
The low voltage detection circuit is valid by setting “1” to bit 1 of
the function set ROM data 0.
Also, when “1” is set to bit 3 of the function set ROM data 0, the
low voltage detection circuit can be valid even in the stop mode.
The low voltage detection circuit is stopped in the stop mode by
setting “0” to this bit, so that the power dissipation is reduced.
相關(guān)PDF資料
PDF描述
M37547G4-XXXFP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36
M37548G2-XXXFP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
M37548G2FP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
M37548G1FP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
M37549G1-XXXFP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37548G1FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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M37548G2-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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