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參數(shù)資料
| 型號(hào)： | M34519E8FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| 封裝： | 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件頁(yè)數(shù)： | 139/162頁(yè) |
| 文件大小： | 960K |
| 代理商： | M34519E8FP |
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Rev.3.01
2005.06.15
page 78 of 160
REJ03B0007-0301
4519 Group
External clock
When the external clock signal for the main clock (f(XIN)) is used,
connect the clock source to XIN pin and XOUT pin open. In pro-
gram, after the CMCK instruction is executed, set main clock
(f(XIN)) oscillation start to be enabled (MR1=0).
For this product, when RAM back-up mode and main clock
(f(XIN)) stop (MR1=1), XIN pin is fixed to “H” in order to avoid the
through current by floating of internal logic. The XIN pin is fixed to
“H” until main clock (f(XIN)) oscillation start to be valid (MR1=0)
by the CMCK instruction from reset state. Accordingly, when an
external clock is used, connect a 1 k
or more resistor to XIN pin
in series to limit of current by competitive signal.
Electric Characteristic Differences Between Mask ROM and One
Time PROM Version MCU
There are differences in electric characteristics, operation mar-
gin, noise immunity, and noise radiation between Mask ROM and
One Time PROM version MCUs due to the difference in the
manufacturing processes.
When manufacturing an application system with the One time
PROM version and then switching to use of the Mask ROM ver-
sion, please perform sufficient evaluations for the commercial
samples of the Mask ROM version.
Note on Power Source Voltage
When the power source voltage value of a microcomputer is less
than the value which is indicated as the recommended operating
conditions, the microcomputer does not operate normally and
may perform unstable operation.
In a system where the power source voltage drops slowly when
the power source voltage drops or the power supply is turned off,
reset a microcomputer when the supply voltage is less than the
recommended operating conditions and design a system not to
cause errors to the system by this unstable operation.
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| M34519M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
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| M34524EDFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34524M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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