M37735EHLXXXHP 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M37735EHLXXXHP

PROM VERSION OF M37735MHLXXXHP

MITSUBISHI ELECTRIC  

PRELIMINARY NSootimcee: pTahriasmisentroict alimfinitsalasrpeescuifbicjeactitotno. change.

RESET CIRCUIT

_____

The microcomputer is released from the reset state when the RESET

pin is returned to “H” level after holding it at “L” level with the power

source voltage at 2.7 – 5.5 V. Program execution starts at the address

formed by setting address A23 – A16 to 0016, A15 – A8 to the contents

of address FFFF16, and A7 – A0 to the contents of address FFFE16.

Figure 3 shows the microcomputer internal status during reset.

Figure 4 shows an example of a reset circuit. When the stabilized

clock is input from the external to the main-clock oscillation circuit,

the reset input voltage must be 0.55 V or less when the power source

voltage reaches 2.7 V. When a resonator/oscillator is connected to

the main-clock oscillation circuit, change the reset input voltage from

“L” to “H” after the main-clock oscillation is fully stabilized.

Power on

RESET

VCC

VCC

0V

2.7V

RESET

0V

0.55V

Note. In this case, stabilized clock is input from the

external to the main-clock oscillation circuit.

Perform careful evalvation at the system design

level before using.

Fig. 4 Example of a reset circuit

MITSUBISHI MICROCOMPUTERS

M37735EHLXXXHP

PROM VERSION OF M37735MHLXXXHP

7

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