參數(shù)資料
型號(hào)： M34282M2-XXXGP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 1 MHz, MICROCONTROLLER, PDSO20
封裝： 0.225 INCH, 0.65 MM PITCH, PLASTIC, SSOP-20
文件頁(yè)數(shù)： 13/71頁(yè)
文件大小： 547K
代理商： M34282M2-XXXGP
Rev.1.33
Mar 18, 2004
page 18 of 67
4282 Group
VOLTAGE DROP DETECTION CIRCUIT
The built-in voltage drop detection circuit is designed to detect a
drop in voltage at operating and to reset the microcomputer if
the supply voltage drops below the specified value (Typ. 1.50 V)
or less.
Fig. 21 Voltage drop detection circuit operation waveform
The voltage drop detection circuit is stopped and power
dissipation is reduced in the RAM back-up mode with the
initialized CPU stopped.
VDD
Internal reset signal
Reset voltage
TYP 1.5V
(Note)
Note: The voltage drop detection circuit does not have
the hysteresis characteristics in the detected voltage.
Microcomputer starts operation
after f(XIN) is counted to 16384 times.
Fig. 22 VDD and VDET
000
00
0
000
0
000
0
000
0
00
0
111
1
111
1
00
000
0
11
Fig. 20 Internal state at reset
Program counter (PC) ..............................................................
Address 0 in page 0 is set to program counter.
Power down flag (P) .................................................................
Timer 1 underflow flag (T1F) ...................................................
Timer 2 underflow flag (T2F) ...................................................
Timer control register V1 ..........................................................
Timer control register V2 ..........................................................
Port CARR output flag (CAR) ..................................................
Pull-down control register PU0 ................................................
Pull-down control register PU1 ................................................
Logic operation selection register LO ......................................
Most significant ROM code reference enable flag (URS)
Carry flag (CY) .........................................................................
Register A .................................................................................
Register B .................................................................................
Register X .................................................................................
Register Y .................................................................................
Stack pointer (SP) ....................................................................
Note on voltage drop detection circuit
The voltage drop detection circuit detection voltage of this
product is set up lower than the minimum value of the supply
voltage of the recommended operating conditions.
A battery exchange of an application product is explained as
an example.
The supply voltage falls below to the recommended operating
voltage while CPU keeps active. Then, an unexpected
oscillation-stop, which does not happen by POF instruction
occurs before the supply voltage falls below to the detection
voltage. In this time, even if the supply voltage re-goes up to
the recommended operating voltage, since reset does not
occur, MCU may not operate correctly.
Please confirm the oscillator you use and the frequency of
system clock, and test the operation of your system sufficiently.
VDD
Recommended operatng
condition min.value
Even if the voltage re-goes up to
the recommended operating voltage,
MCU may not operate correctly.
Oscillation is stopped
incorrectly.
VDET
VDD
Recommended
operatng condition
min.value
VDET
→ Normal operation
Reset
相關(guān)PDF資料
PDF描述
M34283G2-XXXGP 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20
M34506M4-XXXFP 4-BIT, MROM, 4.4 MHz, MICROCONTROLLER, PDSO20
M34507M4-XXXFP 4-BIT, MROM, 4.4 MHz, MICROCONTROLLER, PDSO24
M34524MC-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP64
M34524MC-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M34282T5-OPT 制造商:Renesas Electronics Corporation 功能描述:DEV OPTION BOARD FOR 4282 GROUP/PC4400 - Boxed Product (Development Kits)
M34283 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34283G2GP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34283G2GP#U1 制造商:Renesas Electronics Corporation 功能描述:MICROCONTROLLER
M34283G2-XXXGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*