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componentes Descripción

Fabricante

4250

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4250 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

RESET FUNCTION

System reset is performed by applying “L” level to RESET pin

for 1 machine cycle or more when the following condition is

satisfied;

• the value of supply voltage is the minimum value or more of

the recommended operating conditions.

Then when “H” level is applied to RESET pin, software starts

from address 0 in page 0.

f(XIN)

RESET

Fig. 20 Reset release timing

3584 to 3585 machine cycles

The number of clock cycles depends on the

internal state of the microcomputer when

reset is performed.

Software starts

(address 0 in page 0)

Reset input

1 machine cycle or more 3584 to 3585 machine cycles

0.85VDD

RESET

0.1VDD

Software starts

(address 0 in page 0)

(Note)

Note : Keep the value of supply voltage the minimum value or more

of the recommended operating conditions.

Fig. 21 RESET pin input waveform and reset operation

MITSUBISHI

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ELECTRIC

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