Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3243E_100_072309

15

L

A

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2

3

2

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S

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YES

HIGH

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LOW

LOW

YES

HIGH / LOW

HIGH / LOW

NO

(Auto-Online)

O

RS-232

Receiver Block

RXINACT

Inactive Detection Block

RXIN

RXOUT

Delay

Stage

Delay

Stage

Delay

Stage

Delay

Stage

Delay

Stage

SHUTDOWN

STATUS