M30201 datasheet(28/415 Pages) RENESAS

tên linh kiện	M30201

Giải thích chi tiết về linh kiện	16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

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Mitsubishi microcomputers

M30201 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Reset

Figure 1.12. Reset sequence

Reset

There are two kinds of resets; hardware and software. In both cases, operation is the same after the reset.

(See “Software Reset” for details of software resets.) This section explains on hardware resets.

When the supply voltage is in the range where operation is guaranteed, a reset is effected by holding the

reset pin level “L” (0.2VCC max.) for at least 20 cycles. When the reset pin level is then returned to the “H”

level while main clock is stable, the reset status is cancelled and program execution resumes from the

address in the reset vector table.

Figure 1.11 shows the example reset circuit. Figure 1.12 shows the reset sequence.

Figure 1.11. Example reset circuit

RESET

VCC

0.8V

RESET

VCC

4.0V

Example when VCC = 5V

VCC

RESET

Power source voltage

detection circuit

RESET

VCC

4.0V

BCLK

Address

BCLK

24cycles

FFFFC16

FFFFE16

Content of reset vector

XIN

RESET

More than 20 cycles are needed

(Internal clock)

(Internal address

signal)

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