bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 169

• Manufacturer Part Number: bt8375kpf
• Description: Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
• Manufacturer: Conexant Systems, Inc.

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
LBD[1]
LBD[2]
LBD[3]
LBD[4]
LBD[5]
LBD[6]
LBD[7]
FS_NFAS
EXZ_LCV
YEL_INTEG
N8370DSE
044— Loopback Deactivate Code Pattern (LBD)
045— Receive Alarm Signal Configuration (RALM)
NOTE(S):
(1)
Bit 1 must be written to 0.
LBD[1]
—
7
7
First bit expected of LOOPDN pattern
Second bit expected of LOOPDN pattern
Third bit expected of LOOPDN pattern
Fourth bit expected—Last bit if DN_LEN selects a 4-bit pattern.
Fifth bit expected—Last bit if DN_LEN selects a 5-bit pattern.
Sixth bit expected—Last bit if DN_LEN selects a 6-bit pattern.
Seventh bit expected—Last bit if DN_LEN selects a 7-bit pattern.
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.
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.
Enable Yellow Alarm Integration—When set, both the receive frame and multiframe Yellow
Alarms [RYEL and RMYEL; addr 047] are integrated, as described in
Yellow Alarm Set/Clear Criteria
status [ISR7; addr 004] are similarly affected.
LBD[2]
—
6
6
FS_NFAS
LBD[3]
5
5
0 = FERR and FRED do not include FS/NFAS
1 = FERR and FRED include FS/NFAS
0 = LCV does not include EXZ
1 = LCV includes EXZ
0 = normal RYEL and RMYEL status
1 = integrated RYEL and RMYEL status
EXZ_LCV
LBD[4]
4
4
Conexant
(per the selected framer mode). RYEL and RMYEL interrupt
YEL_INTEG
LBD[5]
3
3
RLOF_INTEG
LBD[6]
2
2
LBD[7]
Table 3-13, Receive
0
1
1
(1)
3.8 Receiver Registers
RPCM_AIS
—
0
0
3-51