XRT86VL32IB datasheet(23/65 Pages) EXAR

23 / 65 page

XRT86VL32

REV. V1.2.0

DUAL T1/E1/J1 FRAMER/LIU COMBO - HARDWARE DESCRIPTION

RxSERCLK0/

RxLINECLK0

RxSERCLK2/

RxLINECLK2

D15

I/O

Receive Serial Clock Signal (RxSERCLKn) / Receive Line

Clock (RxLINECLKn):

The exact function of these pins depends on the mode of oper-

ation selected, as described below.

In Base-Rate Mode (1.544MHz/2.048MHz) - RxSERCLKn:

These pins are used as the receive serial clock on the system

side interface which can be configured as either input or output.

The receive serial interface outputs data on RxSERn on the ris-

ing edge of RxSERCLKn.

When RxSERCLKn is configured as Input:

These pins will be inputs if the slip buffer on the Receive path is

enabled. System side equipment must provide a 1.544MHz

clock rate to this input pin for T1 mode of operation, and

2.048MHz clock rate in E1 mode.

When RxSERCLKn is configured as Output:

These pins will be outputs if slip buffer is bypassed. The receive

framer will output a 1.544MHz clock rate in T1 mode of opera-

tion, and a 2.048MHz clock rate in E1 mode.

DS1/E1 High-Speed Backplane Modes* - (RxSERCLK as

INPUT ONLY)

In this mode, this pin must be used as the high-speed input

clock for the backplane interface to output high-speed or multi-

plexed data on the RxSERn pin. The frequency of RxSERCLK

is presented in the table below.

NOTES:

*High-speed backplane modes include (For T1/E1)

2.048MVIP,

4.096MHz,

8.192MHz,

16.384MHz

HMVIP, H.100, Bit-multiplexed modes, and (For T1

only) 12.352MHz Bit-multiplexed mode.

For DS1 high-speed modes, the DS-0 data is mapped

into an E1 frame by ignoring every fourth time slot

(don’t care).

RECEIVE SYSTEM SIDE INTERFACE

SIGNAL NAME

BALL #TYPE

OUTPUT

DRIVE (MA)

DESCRIPTION

OPERATION MODE

FREQUENCY OF

RXSERCLK(MHZ)

2.048MVIP non-multiplexed

2.048

4.096MHz non-multiplexed

4.096

8.192MHz non-multiplexed

8.192

12.352MHz Bit-multiplexed

(DS1 ONLY)

12.352

16.384MHz Bit-multiplexed

16.384

16.384 HMVIP Byte-multiplexed

16.384

16.384 H.100 Byte-multiplexed

16.384

XRT86VL32IB Datasheet(PDF) 23 Page - Exar Corporation

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