7630 datasheet(39/49 Pages) RENESAS

Part #	7630

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PDF	49 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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MITSUBISHI MICROCOMPUTERS

7630 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

RESET CIRCUIT

The 7630 group is reset according to the sequence shown in Fig.

44. It starts program execution from the address formed by the con-

tents of the addresses FFFB16 and FFFA16, when the RESET pin is

held at “L” level for more than 2

µs while the power supply voltage is

in the recommended operating condition and then returned to “H”

level.

Refer to Fig. 43 for an example of the reset circuit.

Fig. 43

Example of reset circuit

Fig. 44

Reset sequence

power on

power source voltage

reset input voltage

4.0V

0.8V

7630 group

M51953AL

RESET

VSS

VCC

0.1

µF

XIN

RESET

internal reset

Address

Data

?????

28 to 34

cycles of XIN

ADL

ADH

FFFA16

FFFB16

ADL, ADH

1st op code

20 cycles of XIN

24 cycles of XIN

8192 cycles of

XIN (T1, T2)

…

7630 Datasheet(PDF) 39 Page - Renesas Technology Corp

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