MB89935B 데이터 시트보기 (PDF) - Fujitsu

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MB89935B

8-bit Proprietary Microcontroller

Fujitsu 

MB89930A Series

4. AC Characteristics

(1) Reset Timing

Parameter

Symbol

RST “L” pulse width

tZLZH

tHCYL : 1 oscillating clock cycle time

Condition



(AVSS = VSS = 0.0 V, Ta = −40 °C to +85 °C)

Value

Min

Max

Unit

Remarks

48 tHCYL



ns

RST

tZLZH

0.2 VCC

0.2 VCC

Notes: •When the power-on reset option is not on, leave the external reset on until oscillation becomes stable.

•If the reset pulse applied to the external reset pin (RST) does not meet the specifications, it may cause

malfunctions. Use caution so that the reset pulse less than the specifications will not be fed to the external

reset pin (RST).

(2) Power-on Reset

(AVSS = VSS = 0.0 V, Ta = −40 °C to +85 °C)

Parameter

Value

Symbol Condition

Unit

Min Max

Remarks

Power supply rising time

tR



50 ms



Power supply cutoff time

tOFF

1



ms Due to repeated operations

VCC

tR

2.0 V

0.2 V

tOFF

0.2 V

0.2 V

Note : The supply voltage must be set to the minimum value required for operation within the prescribed default

oscillation settling time.

27

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