MB90P663APFM View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB90P663APFM

16-bit Proprietary Microcontroller

Fujitsu 

MB90660A Series

(3) Reset Input Specifications

Parameter

Reset input time

Symbol Pin name

tRSTL RST

(VCC = +2.7 V to +5.5 V, VSS = 0.0 V, TA = –40°C to +85°C)

Conditions

Value

Min. Max.

Unit

Remarks

—

16

— Machine cycle

RST

tRSTL

0.2 VCC

0.2 VCC

(4) Power-On Reset

Parameter

Power supply rise time

Power supply cutoff time

Symbol Pin name Conditions

tR

VCC

—

tOFF

VCC

(VSS = 0.0 V, TA = –40°C to +85°C)

Value

Unit

Min. Max.

Remarks

—

30

ms *

1

—

ms

Due to repeated

operations

* : VCC should be lower than 0.2 V before power supply rise.

Notes: • The above specifications are the numeric values needed for causing a power-on reset.

• There are built in resisters initialized only by power on reset in the device.

Turn on power supply according to the specification at the point of this initialization.

tR

2.7 V

VCC

0.2 V

An abrupt change in the supply voltage may activate power-on reset.

If the supply voltage must be changed during operation, the voltage change should be smooth without

sudden fluctuations.

5.0 V

VCC

2.0 V

VSS

RAM data maintained

A rise time of 50 mV/ms or less

is recommended.

55

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