BT8376EPF datasheet(134/323 Pages) CONEXANT

134 / 323 page

3.0 Registers

Bt8370/8375/8376

3.4 Interrupt Status Registers

Fully Integrated T1/E1 Framer and Line Interface

3-16

Conexant

N8370DSE

004—Alarm 1 Interrupt Status (ISR7)

All events reported in ISR7 are from dual-edge sources, except Receive Pulse Density Violation [RPDV]. Any

transition of real-time status in Alarm 1 Status register [ALM1; addr 047] forces the corresponding ISR7 status

bit active (high). Active-high status is latched and held according to the LATCH_ALM bit [addr 046]. Each

event triggers an interrupt if the corresponding IER7 bit is enabled [addr 00C].

RMYEL

Loss/Recovery of Multiframe Yellow Alarm—Reports any change in real-time status of

Multiframe Yellow (E1) or ESF Yellow (T1) alarm detector.

0 = no event

1 = multiframe Yellow Alarm transition

RYEL

Loss/Recovery of Yellow Alarm—Reports any change in real-time status of Remote Alarm

Indication (RAI), also referred to as Yellow Alarm.

0 = no event

1 = Yellow Alarm transition

RPDV

Receive Pulse Density Violation—Reports each occurrence of a receive pulse density

violation, according to ANSI T1.403 sliding window criteria. RPDV is latched active upon

detection of any window of 8 (N+1) bits which does not contain at least N pulses. For

example, RPDV reports each occurrence of 16 consecutive 0s.

0 = no error

1 = receive pulse density violation

RAIS

Loss/Recovery of Alarm Indication Signal—Reports any change in real-time status of the AIS

detector.

0 = no event

1 = AIS transition

RALOS

Loss/Recovery of Receive Analog Signal—Reports any change in analog receive level

detector’s real-time status, or receive equalizer’s acquisition status (ACQUIRE; addr 021).

0 = no event

1 = receive level transition

RLOS

Loss/Recovery of Receive Signal—Reports any change in real-time status of digital receive

signal detector.

0 = no event

1 = receive signal transition

RLOF

Loss/Recovery of Frame Alignment—Reports any change in real-time or integrated status of

receive online frame status monitor.

0 = no event

1 = receive frame status transition

SIGFRZ

Loss/Recovery of Signaling Freeze—Reports any change in real-time status of SIGFRZ

receiver status, which is also available on the SIGFRZ output pin.

0 = no event

1 = SIGFRZ transition

RMYEL

RYEL

RPDV

RAIS

RALOS

RLOS

RLOF

SIGFRZ

BT8376EPF Datasheet(PDF) 134 Page - Synaptics Incorporated.

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