Rainbow-electronics DS1846 Manual do Utilizador descarregar pdf (Página 11)

DS1846

11 of 16

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NON-MASKABLE INTERRUPT EXAMPLE Figure 6

V

SENSE

=

R2

R2 R1+

X 1.25 V

MAX

=

TP

SENSE

V

V

X V

CC

Example: V

SENSE

= 4.70V at the trip point

V

CC

= 3.3V

10 kΩ = R2

Therefore:

25.1

70.4

X 3.3 = 12.4V maximum

4.70 =

10

k

10k R1+

X 1.25 R1 = 27.6 kΩ

DS1846

SDA

SCL

A0

WP

NMI

L0

W1

L1

L2

GND

V

CC

IN

PBRST

RST

RST

H0

W0

H1

W2

H2

5V

RST

INTO

8051

µp

V

SENSE

1 2 ... 6 7 8 9 10 11 12 13 14 15 16

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