M62003L 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

M62003L

Low Power 2 Output System Reset IC Series

Renesas Electronics 

M62001L/FP to M62008L/FP

3. RESET output (Detection of 2.15 V)

The RESET outputs a signal to prevent the microcomputer from malfunctioning due to a drop in supply voltage.

When powering up, RESET is kept at low level until the supply voltage reaches VSH. If the supply voltage rises to

VSH, RESET is set to high level. By inserting a capacitor between the Cd pin and GND, it is possible to produce a

desired delay time (td). To set a delay time, equation below is used.

td ≈ 1.52 × 105 × C (s)

Once the supply voltage has exceeded VSH and the RESET output is set to high level, RESET maintains the high

level until the supply voltage drops to VBATT. When the supply voltage drops to VBATT, RESET goes low thereby

resetting and initializing the microcomputer.

The RESET output has a large hysteresis voltage of approximately 2 V between the rise in supply voltage at power-

up and its fall.

RESET Output Voltage vs. Supply Voltage

5

4

3

2

VBATT

1

VSH

0

2

3

4

5

Supply Voltage VCC (V)

Figure 3 RESET Output (Detection of 2.15 V)

Rev.1.00 Sep 14, 2005 page 7 of 9

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