參數(shù)資料
型號： MB90F372PMT-G
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144
封裝： 0.40 MM PITCH, PLASTIC, LQFP-144
文件頁數(shù)： 57/153頁
文件大?。?/td> 2503K
代理商： MB90F372PMT-G
MB90370 Series
15
■ HANDLING DEVICES
●
Be sure that the maximum rated voltage is not exceeded (latch-up prevention).
A latch-up may occur on a CMOS IC if a voltage higher than VCC or lower than VSS is applied
to an input or output pin other than medium-to-high voltage pins. A latch-up may also occur if
a voltage higher than the rating is applied between VCC and VSS. A latch-up causes a rapid
increase in the power supply current, which can result in thermal damage to an element.
Take utmost care that the maximum rated voltage is not exceeded.
When turning the power on or off to analog circuits, be sure that the analog supply voltages
(AVCC, CVCC, AVR, CVRH1, CVRH2 and CVRL) and analog input voltage do not exceed the
digital supply voltage (VCC).
●
Stabilize the supply voltages
Even within the operation guarantee range of the VCC supply voltage, a malfunction can be
caused if the supply voltage undergoes a rapid change. For voltage stabilization guidelines,
the VCC ripple fluctuations (P-P value) at commercial frequencies (50 to 60 Hz) should be
suppressed to "10%" or less of the reference VCC value. During a momentary change such
as when switching a supply voltage, voltage fluctuations should also be suppressed so that
the "transient fluctuation rate" is 0.1 V/ms or less.
●
Power-on
To prevent a malfunction in the built-in voltage drop circuit, secure "50
s (between 0.2 V and
1.8 V)" or more for the voltage rise time during power-on.
●
Treatment of unused input pins
An unused input pin may cause a malfunction if it is left open. Every unused input pin should
be pulled up or down.
●
Treatment of A/D converter, D/A converter and comparator power pin
When the A/D converter, D/A converter and comparator is not used, connect the pins as
follows: AVCC = CVCC = VCC, AVSS = AVR = CVSS = CVRL = CVRH1 = CVRH2 = VSS.
●
Notes on external clock
When an external clock is used, the oscillation stabilization wait time is required at power-on
reset or at cancellation of sub-clock mode or stop mode. As shown in diagram below, when
an external clock is used, connect only the X0 pin and leave the X1 pin open.
X0
X1
Open
MB90370 series
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