MB89P935C Fujitsu Microelectronics, Inc., MB89P935C Datasheet - Page 11

• Manufacturer Part Number: MB89P935C
• Description: 8-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

I HANDLING DEVICES
1. Preventing Latchup
2. Treatment of Unused Input Pins
3. Treatment of N.C. Pins
4. Power Supply Voltage Fluctuations
5. Treatment of Power Supply Pins on Microcontrollers with A/D Converter
6. Precautions when Using an External Clock
7. About the Wild Register Function
8. Program Execution in RAM
Latchup may occur on CMOS ICs if voltage higher than V
other than medium- and high-voltage pins or if higher than the voltage which shows on “1. Absolute Maximum
Ratings” in “I Electrical Characteristics” is applied between V
When latchup occurs, power supply current increases rapidly and might thermally damage elements. When
using, take great care not to exceed the absolute maximum ratings.
Also, take care to prevent the analog power supply (AV
power supply (V
Leaving unused input pins open could cause malfunctions. They should be connected to a pull-up or pull-down
resistor of at least 2 kilohms between the pin and the power supply.
Be sure to leave (internally connected) N.C. pins open.
Although V
could cause malfunctions, even if it occurs within the rated range. Stabilizing voltage supplied to the IC is
therefore important. As stabilization guidelines, it is recommended to control power so that V
(P-P value) will be less than 10% of the standard V
transient fluctuation rate will be less than 0.1 V/ms at the time of a momentary fluctuation such as when power
is switched.
Connect to be AV
When an external clock is used, oscillation stabilization time is required for power-on reset (optional) and wake-
up from stop mode.
No wild register can be debugged on the MB89PV930A. For the operation check, test the MB89P935C installed
on a target system.
When the MB89PV930A is used, no program can be executed in RAM.
CC
power supply voltage is assured to operate within the rated range, a rapid fluctuation of the voltage
CC
CC
) when the analog system power supply is turned on and off.
= V
CC
and AV
SS
= AVR = V
SS
even if the A/D converter is not in use.
CC
value at the commercial frequency (50 to 60 Hz) and the
CC
CC
and AVR) and analog input from exceeding the digital
or lower than V
CC
and V
SS
MB89930C Series
.
SS
is applied to input and output pins
CC
ripple fluctuations
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