cx29503 Mindspeed Technologies, cx29503 Datasheet - Page 179

• Manufacturer Part Number: cx29503
• Description: Cx29503 Broadband Access Multiplexer Data Sheet
• Manufacturer: Mindspeed Technologies

CX29503 Data Sheet
RLOF
0x48—Alarm 2 Status (ALM2)
Reports the real-time status of transmit alarms and inband loopback code word detectors. Any change in the
current status activates the corresponding interrupt status bit [ISR6; addr: 005].
LOOPDN
LOOPUP
29503-DSH-002-B
LOOPDN
7
Receive Loss of Frame Alignment—Real-time or integrated RLOF status depends on selected
receive framer mode, out-of-frame criteria [RLOFA–RLOFD; addr: 040], and integration
mode [RLOF_INTEG; addr: 045]. In the CX28394/5/8 Data Sheet, see
Appendix A to find which frame bits are monitored. See
criteria for frame alignment loss/recovery criteria during the selected mode. During E1 mode,
RLOF indicates logically ORed status of FAS/MFAS alignment machines from which
individual alignment status is reported separately in FRED/MRED [addr: 049].
LOOPUP
Inband Loopback Deactivate—Reports detection or loss of an inband loopback code which
matches the programmed LOOPDN code [LBD; addr: 044].
Inband Loopback Activate—Reports detection or loss of an inband loopback code which
matches the programmed LOOPUP code [LBA; addr: 043].
6
Table 8-20. Receive Alarm Indication Signal (RAIS)
0 = no alarm
1 = receive loss of frame alignment
Unused and reserved bits should be written to 0.
0 = no inband code (or lost)
1 = LOOPDN code detected
0 = no inband code (or lost)
1 = LOOPUP code detected
Mode
E1
E1
T1
T1
—
5
RAIS
Mindspeed Technologies™
0
1
0
1
Preliminary Information
Cleared if 2 consecutive double frames (500 µs) each contain 3 or more 0s
out of 512 bits or FAS alignment is recovered [FRED = 0; addr: 049].
Set if 2 consecutive double frames each contain 2 or fewer 0s out of 512
bits and FAS alignment is lost [FRED = 1; addr: 049].
Cleared if data received for a period of 3 ms contains 5 or more 0s out of
4,632 bits or frame alignment is recovered [FRED = 0; addr: 049].
Set if data received for a period of 3 ms contains 4 or fewer 0s out of 4,632
bits and frame alignment is lost [FRED = 1; addr: 049].
—
4
RESERVED
3
Set/Clear Criteria
Table 8-6
—
2
for the loss/recovery
RESERVED
Tables A-1–A-6
1
Register Description
—
0
in
8
-
49