cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 165
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cx28394
Manufacturer Part Number
cx28394
Description
Quad/x16/octal-t1/e1/j1 Framers
Manufacturer
Conexant Systems, Inc.
Datasheet
1.CX28394.pdf
(305 pages)
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CX28394/28395/28398
Quad/x16/Octal—T1/E1/J1 Framers
Table 3-13. Receive Yellow Alarm Set/Clear Criteria (2 of 2)
RLOF_INTEG
RPCM_YEL
RPCM_AIS
100054E
YJ
YJ_INT
Y24
Y24_INT
YF
YF_INT
Mode
Enable RLOF Integration—When set, the receive loss of frame status [RLOF; addr 047] is
integrated for 2.0 to 2.5 seconds during T1 framer modes (not applicable to E1 modes). RLOF
interrupt status [ISR7; addr 004] is also integrated. However, receive framer status in ALM3
[addr 049], loss of frame count [FRED[3:0]; addr 05A], and RLOF counter overflow [ISR4;
addr 007] are unaffected.
Send Bit2 Yellow Alarm on RPCMO Output Pin—Similar to RPCM_AIS, except all RPCMO
time slot Bit2 locations are replaced by all zeros. Bit2 yellow alarms are applicable only to T1
mode. E1 modes do not require yellow alarm forwarding.
Send AIS on RPCMO Output Pin—Replaces RPCMO data with a continuous series of all
ones. RPCM_AIS is useful in CSU or digital section applications, where the local interface
must be able to forward an AIS to the opposing interface. RPCM_AIS has a higher priority
than RPCM_YEL.
Set for 1 multiframe (1.5 ms) if frame 12 contains Fs bit = 1. Cleared for 1 multiframe if frame 12 contains
Fs bit = 0.
Set for 16 multiframes (24 ms) if every frame 12 contains Fs bit = 1. Cleared for 16 multiframes (24 ms) if at
least 1 frame 12 contains Fs bit = 0.
Set for 1 frame (125 s) if TS24 contains bit 6 = 0. Cleared for 1 frame if TS24 contains bit 6 = 1.
Set for 192 frames (24 ms) if every TS24 bit 6 = 0. Cleared for 192 frames if at least 1 TS24 bit 6 = 1.
Set for 32 frames (4 ms) if 16 FDL bits contain yellow alarm priority codeword pattern (00FFh). Cleared for
32 frames if 16 FDL bits do not contain a yellow alarm priority codeword pattern.
Set upon reception of 16 FDL bits matching yellow alarm priority codeword and remains set as long as the
codeword pattern is not interrupted for greater than 100 ms. Cleared when the yellow alarm priority
codeword is not present for more than 100 ms (26 missing codewords = 104 ms).
0 = normal RLOF status
1 = integrated RLOF [addr 047] status
0 = normal RPCMO data
1 = RPCMO includes Bit2 yellow alarm
0 = normal RPCMO data
1 = RPCMO replaced with all ones
Conexant
Set/Clear Criteria
3.9 Receiver Registers
3.0 Registers
3-43
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