AME, Inc.

2

Micropower

µµµµµP Watch Dog Timer

AME8510 / 8520 / 8530

AME8510 AME8520 AME8530

111

RESET/

RESETB

This pin may be either RESET or RESETB.

RESETB is active

low. In the case of the AME8520 and AME8530 this pin will

always be the opposite polarity from pin 3. This pin can be

push/pull or open drain.

222GND

Ground

N/A

3

3

RESET/

RESETB

This pin may be either RESETB or RESET.

RESET is active

high. In the case of the AME8520 and AME8530 this pin will

always be the opposite polarity from pin 1. This pin can be

either push/pull or open drain.

3N/A

4

MRB

Manual Reset. Active low. Pulling this pin low forces a reset.

After a low to high transition reset remains asserted for exactly

one reset timeout period. This pin is internally pulled high. If

4

4

N/A

WDI

Watch Dog Input. Any transition on this pin will reset the watch

dog timer. If this pin remains high or low for longer than the

watch dog interval then a reset is asserted. Float or tristate this

pin to disable the watch dog feature.

555

Positive power supply. A reset is asserted after this voltage

level reset remains asserted until the end of the reset timeout

period.

Pin Name

Pin Description

Pin #

n Pin Description