XRT86VL34 datasheet(80/156 Pages) EXAR

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XRT86VL34

QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

REV. V1.2.0

TABLE 55: RECEIVE SIGNALING CONTROL REGISTER 0-23 (RSCR 0-23)

HEX ADDRESS: 0Xn3A0 TO 0XN3B7

BIT

FUNCTION

TYPE

DEFAULT

DESCRIPTION-OPERATION

SIGC_ENB

R/W

Signaling substitution enable

This bit enables or disables signaling substitution on the receive

side on a per channel basis. Once signaling substitution is enabled,

received signaling bits ABCD will be substituted with the ABCD val-

ues in the Receive Substitution Signaling Register (RSSR).

Signaling substitution only occurs in the output PCM data

(RxSERn). Receive Signaling Array Register (RSAR - Address

0xn500-0xn51F) and the external Signaling bus (RxSIG_n) output

pin will not be affected.

0 = Disables signaling substitution on the receive side.

1 = Enables signaling substitution on the receive side.

OH_ENB

R/W

Signaling OH interface output enable

This bit enables or disables signaling information to output via the

Receive Overhead pin (RxOH_n) on a per channel basis. The sig-

naling information in the receive signaling array registers (RSAR -

Address 0xn500-0xn51F) is output to the receive overhead output

pin (RxOH_n) if this bit is enabled.

0 = Disables signaling information to output via RxOH_n.

1 = Enables signaling information to output via RxOH_n.

DEB_ENB

R/W

Per-channel debounce enable

This bit enables or disables the signaling debounce feature on a per

channel basis.

When this feature is enabled, the per-channel signaling state must

be in the same state for 2 superframes before the Receive Framer

updates signaling information on the Receive Signaling Array Regis-

ter (RSAR) and the Signaling Pin (RxSIGn). If the signaling bits for

two consecutive superframes are not the same, the current state of

RSAR and RxSIG will not change.

When this feature is disabled, RSAR and RxSIG will be updated as

soon as the receive signaling bits have changed.

0 = Disables the Signaling Debounce feature.

1 = Enables the Signaling Debounce feature.

XRT86VL34 Datasheet(PDF) 80 Page - Exar Corporation

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