cx29503 Mindspeed Technologies, cx29503 Datasheet - Page 171

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

CX29503 Data Sheet
8.3.2.5
0x40—Receiver Configuration (RCR0)
RAMI
RABORT
RFORCE
RLOFD–RLOFA
29503-DSH-002-B
RAMI
7
Receive AMI Encoded Input—Disables ZCS encoding/decoding for AMI formatted RTIP/
RRING receive signals. The CX29503 device does not include a ZCS encoder/decoder. This
bit must be set for CX29503.
Abort/Disable RX Offline Framer—When set, the offline framer ignores reframe requests
from the online framer (RLOF) and aborts any in-progress RLOF reframe request. LOF status
[RLOF; addr: 047] is not affected. While RABORT remains set, the offline framer responds
only to processor-forced reframes (RFORCE). This allows the processor to manually control
reframe criteria and prevent changes in the current receive frame alignment. RABORT is
typically set only during unchannelized operation.
Force RX Reframe—Forces the offline framer to perform a single reframe according to a
selected receive framer mode. RFORCE is automatically cleared when the offline framer
acknowledges the request [FSTAT; addr: 017]. The processor does not typically need to force
reframe since the online framer reframe request (RLOF) is active whenever reframe criteria
(RLOFD–RLOFA) is met. However, the processor may force reframe if frame or CRC error
ratios indicate that the framer might have aligned to a duplicated frame alignment pattern.
RX Reframe Criteria—Determines the number of frame errors that the online framer must
detect before declaring LOS alignment [ALM1; addr: 047]. See Receive Framer mode
[RFRAME; addr: 001] and
RABORT
6
Digital Receiver Registers
0 = receive B8ZS/HDB3 line format
1 = receive AMI line format
0 = normal framer operation
1 = framer disabled
0 = no effect
1 = force RX reframe
Table 8-13. Reframe Criteria
GENERAL NOTE:
disabled if RLOFD–RLOFA equals all 0s.
T1/E1N
RFORCE
0
0
1
1
1
5
Mindspeed Technologies™
Other RLOFD–RLOFA combinations are invalid. RAIS and RLOF statuses are
Table 8-5
RLOFD
Preliminary Information
RLOFD–RLOFA
4
0100
1100
0001
0010
0100
to find which frame bits are monitored.
RLOFC
3
3 consecutive FAS or 915 CRC errors
3 consecutive FAS errors
2 out of 4 F-bit errors
2 out of 5 F-bit errors
2 out of 6 F-bit errors
RLOFB
2
Reframe Criteria
RLOFA
1
Register Description
RESERVED
0
8
-
41