U6809B datasheet(3/16 Pages) ATMEL

3 / 16 page

U6809B

4764A–AUTO–10/03

Pin Description

Name

Type

Function

Logic

RELI

Digital input

Activation of relay driver

Driver on: L

Driver off: H

LA1I

Digital input

Activation of lamp driver 1

Driver off: L

Driver on: H

LA2I

Digital input

Activation of lamp driver 2

Driver off: L

Driver on: H

RELO

Open-collector driver output

Fail-safe relay driver

Driver off:---

Driver on: L

5, 6

GND

Supply

Standard ground

FBLA1

Digital output

Feedback lamp1

See Table 1 on page 5 and

Table 2 on page 5

NRES

Digital output

Negative reset signal

Reset: L

No reset: H

PRES

Digital output

Positive reset signal

Reset: H

No reset: L

FBLA2

Digital output

Feedback lamp 2

See Table 1 on page 5 and

Table 2 on page 5

OSC

Analog input

External RC for watchdog timer

ENO

Open-collector output

Watchdog disable output

Watchdog ok: ---

Watchdog n ok: L

AUX, GND

Supply

Auxiliary ground of lamp drivers

LA2O

Open-collector driver output

Warning lamp driver

Driver off: ---

Driver on: L

15, 16, 17

GND

Supply

Standard ground

LA1O

Open-collector driver output

Warning lamp driver

Driver off: ---

Driver on: L

Supply

5 V supply

WDI

Digital input

Watchdog trigger signal

Pulse sequence

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