cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 164

• Manufacturer Part Number: cx28394
• Description: Quad/x16/octal-t1/e1/j1 Framers
• Manufacturer: Conexant Systems, Inc.

3.0 Registers
3.9 Receiver Registers
Unused bits are reserved and should be written to 0.
DIS_LCV
FS_NFAS
EXZ_LCV
YEL_INTEG
Table 3-13. Receive Yellow Alarm Set/Clear Criteria (1 of 2)
3-42
045—Receive Alarm Signal Configuration (RALM)
Y0
Y0_INT
Y16
Y16_INT
YB2
YB2_INT
—
Mode
7
Disable LCV indication and counting. Primarily used in configurations where receive data is
unipolar NRZ. If AUTO_PRM is enabled (PRM; addr 0AA) LV is transmitted with a default
value of 0.
Include FS/NFAS in FERR and FRED—Selects whether Fs bit errors (T1) or NFAS Bit2
errors (E1) are counted as frame errors [FERR; addr 050, 051]. Further selects whether loss of
frame alignment [FRED; addr 049] includes Fs or NFAS bit errors as part of the detection
criteria. Note that the number of Fs bit locations checked also depends on JYEL framer mode.
Excess Zeros Included in LCV—Whether line code violation error count [LCV; addr 054,
055] includes EXZ errors depends on the EXZ_LCV control setting. 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
selected framer mode). RYEL and RMYEL interrupt status [ISR7; addr 004] are similarly
affected.
DIS_LCV
Set for 4 frames (500 s) if 2 consecutive NFAS frames each contain TS0 bit 3 = 1. Cleared for 4 frames if 2
consecutive NFAS frames each contain TS0 bit 3 = 0.
Set for 16 multiframes (24 ms) if every NFAS frame contains TS0 bit 3 = 1. Cleared for 16 multiframes if 1 or
more NFAS frames contain TS0 bit 3 = 0.
Set for 2 multiframes (4 ms) if frame 0 in 2 consecutive multiframes contains TS16 bit 6 = 1. Cleared for 2
multiframes if frame 0 in 2 consecutive multiframes contains TS16 bit 6 = 0.
Set for 16 multiframes (24 ms) if every frame 0 contains TS16 bit 6 = 1. Cleared for 16 multiframes if at
least 1 frame 0 contains TS16 bit 6 = 0.
Set for 1 frame (125 s) if all 24 time slots contain bit 2 = 0. Cleared for 1 frame if 1 or more time slots
contain bit 2 = 1.
Set for 192 frames (24 ms) if less than 15 time slots contain bit 2 = 0. Cleared for 192 frames if 15 or more
time slots contain bit 2 = 1.
0 = LCV counting and indication enabled
1 = LCV counting and indication disabled
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
6
FS_NFAS
5
EXZ_LCV
4
Conexant
Set/Clear Criteria
YEL_INTEG
3
RLOF_INTEG
2
Quad/x16/Octal—T1/E1/J1 Framers
CX28394/28395/28398
RPCM_YEL
Table 3-13
1
(per the
RPCM_AIS
100054E
0