MB90561 データシートの表示（PDF） - Fujitsu

部品番号

コンポーネント説明

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MB90561

16-bit Proprietary Microcontrollers (CMOS)

Fujitsu 

MB90560/565 Series

s HANDLING DEVICES

Take note of the following nine points when handling devices :

• Do not exceed maximum rated voltage (to prevent latch-up)

• Supply voltage stability

• Power-on precautions

• Treatment of unused pins

• Treatment of A/D converter power supply pins

• Notes on using an external clock

• Power supply pins

• Sequence for connecting and disconnecting the A/D converter power supply and analog input pins

• Notes on using the DIV A, Ri and DIVW A, RWi instructions

• Device Handling Precautions

(1) Do not exceed maximum rated voltage (to prevent latch-up)

Do not apply a voltage grater than VCC or less than VSS to the MB90560/565 series input or output pins. Also

ensure that the voltage between VCC and VSS does not exceed the rating. Applying a voltage in excess of the

ratings may result in latch-up causing thermal damage to circuit elements.

Similarly, when connecting or disconnecting the power to the analog power supply (AVCC, AVR) and analog

inputs (AN0 to AN7) , ensure that the analog power supply voltages do not exceed the digital voltage (VCC) .

(2) Supply voltage stability

Rapid changes in the VCC supply voltage may cause the device to misoperate. Accordingly, ensure that the VCC

power supply is stable. The standard for power supply voltage stability is a peak-to-peak VCC ripple voltage at

the supply frequency (50 to 60 Hz) of 10% or less of VCC and a transient fluctuation in the voltage of 0.1 V/ms

or less when turning the power supply on or off.

(3) Power-on precautions

To prevent misoperation of the internal regulator circuit, ensure that the voltage rise time at power-on is at least

50 µs (between 0.2 V to 2.7 V) .

(4) Treatment of unused pins

Leaving unused input pins unconnected can cause misoperation or permanent damage to the device due to

latchup. Always pull-up or pull-down unused pins using a 2 kΩ or larger resistor.

If some I/O pins are unused, either set as outputs and leave open circuit or set as inputs and treat in the same

way as input pins.

(5) Treatment of A/D converter power supply pins

If not using the A/D converter, connect the analog power supply pins so that AVCC = AVR = VCC and AVSS = VSS.

(6) Notes on using an external clock

Even if using an external clock, an oscillation stabilization delay time occurs after a power-on reset and when

recovering from stop mode in the same way as when an oscillator is connected. When using an external clock,

drive the X0 pin only and leave the X1 pin open.

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