BT8376EPF datasheet(169/323 Pages) CONEXANT

169 / 323 page

Bt8370/8375/8376

Fully Integrated T1/E1 Framer and Line Interface

3.8 Receiver Registers

N8370DSE

Conexant

3-51

044—Loopback Deactivate Code Pattern (LBD)

LBD[1]

First bit expected of LOOPDN pattern

LBD[2]

Second bit expected of LOOPDN pattern

LBD[3]

Third bit expected of LOOPDN pattern

LBD[4]

Fourth bit expected—Last bit if DN_LEN selects a 4-bit pattern.

LBD[5]

Fifth bit expected—Last bit if DN_LEN selects a 5-bit pattern.

LBD[6]

Sixth bit expected—Last bit if DN_LEN selects a 6-bit pattern.

LBD[7]

Seventh bit expected—Last bit if DN_LEN selects a 7-bit pattern.

045—Receive Alarm Signal Configuration (RALM)

FS_NFAS

Include FS/NFAS in FERR and FRED—Selects whether Fs bit errors (T1) or NFAS Bit 2

errors (E1) are counted as frame errors [FERR; addr 050, 051], and loss of frame alignment

[FRED; addr 049] includes Fs or NFAS bit errors as part of the detection criteria. A number of

Fs bit locations checked also depends on JYEL framer mode.

0 = FERR and FRED do not include FS/NFAS

1 = FERR and FRED include FS/NFAS

EXZ_LCV

Excess Zeros Included in LCV—Select line code violation error count [LCV; addr 054, 055]

includes EXZ errors. Depending on RZCS bit setting [addr 040], each EXZ is equal to either 8

or 16 consecutive zeros.

0 = LCV does not include EXZ

1 = LCV includes EXZ

YEL_INTEG

Enable Yellow Alarm Integration—When set, both the receive frame and multiframe Yellow

Alarms [RYEL and RMYEL; addr 047] are integrated, as described in Table 3-13, Receive

Yellow Alarm Set/Clear Criteria (per the selected framer mode). RYEL and RMYEL interrupt

status [ISR7; addr 004] are similarly affected.

0 = normal RYEL and RMYEL status

1 = integrated RYEL and RMYEL status

LBD[1]

LBD[2]

LBD[3]

LBD[4]

LBD[5]

LBD[6]

LBD[7]

—

——

FS_NFAS

EXZ_LCV

YEL_INTEG

RLOF_INTEG

0(1)

RPCM_AIS

NOTE(S):

(1) Bit 1 must be written to 0.

BT8376EPF Datasheet(PDF) 169 Page - Synaptics Incorporated.

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