BT8376EPF datasheet(193/323 Pages) CONEXANT

193 / 323 page

Bt8370/8375/8376

Fully Integrated T1/E1 Framer and Line Interface

3.12 Transmitter Registers

N8370DSE

Conexant

3-75

TVERR

Inject Line Code Violation—Injects a single LCV error depending on the line mode and the

selected ZCS. In T1 mode, the LCV injector waits for transmission of two consecutive pulses

on the data output before performing BPV error insertion and clearing the TVERR bit. A BPV

error cannot be injected into a transmit data stream that does not contain two consecutive 1s.

TVERR is latched until an opportunity to inject a BPV error is presented, thus preventing the

receiving end from detecting frame or multiframe bit errors, CRC errors, multiple BPV errors

(due to ZCS pattern corruption), or PRBS test pattern bit errors as a consequence of error

insertion. In E1 mode with HDB3 selected, the LCV injector sends two consecutive BPVs of

the same polarity, which causes the receiving end to detect a single LCV error.

0 = no effect

1 = inject line code violation

074—Transmit Manual Sa-Byte/FEBE Configuration (TMAN)

INS_SA[8]

Manual Sa8-Byte Transmit (0-bypass)

INS_SA[7]

Manual Sa7-Byte Transmit (0-bypass)

INS_SA[6]

Manual Sa6-Byte Transmit (0-bypass)

INS_SA[5]

Manual Sa5-Byte Transmit (0-bypass)

INS_SA[4]

Manual Sa4-Byte Transmit (0-bypass)

FEBE_II

Bit to manually transmit in FEBE bit position of Frame 15.

FEBE_I

Bit to manually transmit in FEBE bit position of Frame 13.

TFEBE

Manual Transmit FEBE (Overrides INS_FE; addr 072)—Provides a manual override for

FEBE bits that are normally sent by the alarm formatter [INS_FE; addr 072]. When active,

FEBE_I controls the data output in TS0 bit 1 of frame 13 (FEBE13), and FEBE_II controls the

data output in TS0 bit 1 of frame 15 (FEBE15).

INS_SA[8]

INS_SA[7]

INS_SA[6]

INS_SA[5]

INS_SA[4]

FEBE_II

FEBE_I

TFEBE

INS_FE

TFEBE

FEBE[13]

FEBE[15]

Description

TPCMI

Bypass FEBE

SMF I

SMF II

Automatic FEBE

FEBE_I

FEBE_II

Manual FEBE

NOTE:

Automatic FEBE insertion uses two CRC4 error signals from the receiver to

indicate SMF I and SMF II errors. Each error signal is latched and held for one

full multiframe to compensate for phase differences between receive and transmit

multiframe timing.

BT8376EPF Datasheet(PDF) 193 Page - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 193 Page - Synaptics Incorporated.

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