XRT7250 datasheet(461/463 Pages) EXAR

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XRT7250 Datasheet(PDF) 461 Page - Exar Corporation

461 / 463 page

XRT7250

áç

DS3/E3 FRAMER IC

REV. 1.1.1

442

(Local Loop-back) within the Framer Operating Mode

NOTES:

1. When the XRT7250 DS3/E3 Framer IC is operating

in the Framer Local-Loop-back Mode, no data will

be output via the TxPOS and TxNEG output pins.

2. The XRT7250 DS3/E3 Framer IC cannot be config-

ured to operate in the Framer Local Loop-back

Mode, if it is configured to operate in Modes 1 or

Mode 4 (Loop-Timing Modes). The user must con-

figure the XRT7250 Framer to operate in one of the

Local-Timing modes.

FRAMER OPERATING MODE REGISTER (ADDRESS = 0X00)

BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0

Local Loopback

DS3/E3*

Internal

LOS

Enable

RESET

Interrupt

Enable Reset

Frame Format

TimRefSel[1:0]

R/W

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