Preliminary Data Sheet
May 2001
TMXF28155/51 Super Mapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
275
Agere Systems Inc.
12 28-Channel Framer Registers
(continued)
Table 384. FRM_PMLR3, Performance Monitor Link Register 3 (R/W)
* See
Table 381
for values of L and P.
Address
*
Bit
Name
Function
Reset
Default
00000
0xF
0x8LP82
15:11
10:7
—
Reserved.
Must write to 0.
FRM_MHGALIGN[3:0]
Handling Group Alignment Interrupt Mask.
A 1 masks
the corresponding status bit in the interrupt status register
(
Table 400
) from generating an interrupt. A 0 allows an
interrupt to be generated.
FRM_MSEFS
Severely Errored Frame Interrupt Mask.
A 1 masks the
corresponding status bit in the interrupt status register
(
Table 400
) from generating an interrupt. A 0 allows an
interrupt to be generated.
FRM_MFE
CEPT Functional Element Status Interrupt Mask.
A 1
masks any and all of the FE status bits in
Table 394
and
Table 395
from generating an interrupt. A 0 allows an
interrupt to be generated.
FRM_PM_IM6[15:0]
Performance Monitor Register FRM_PMLR6 Interrupt
Mask.
A 1 masks the corresponding status bit in the inter-
rupt status register (
Table 387
) from generating an inter-
rupt. A 0 allows an interrupt to be generated.
6
1
5
1
4:0
0x001F
Table 385. FRM_PMLR4, Performance Monitor Link Register 4 (COR)
Address
*
Bit
Name
Function
Reset
Default
0
0x8LP83
15
FRM_SLIPO
Receive Elastic Store Slip Overflow.
A 1 indicates that the
receive elastic store performed a control slip due to an elastic
store overflow condition. This signal is set when the error occurs
and is cleared when it is read, if there is not another error during
the read.
Receive Elastic Store Slip Underflow.
A 1 indicates that the
receive elastic store performed a control slip due to an elastic
store underflow condition. This signal is set when the error
occurs and is cleared when it is read, if there is not another
error during the read.
Out Of Frame.
A 1 indicates that the receive framer has lost
frame alignment and is currently searching for a new frame
alignment.
Section 21.6.1 Loss of Frame Alignment Criteria on
page 488
lists the loss of frame criteria for the framing bit.
(T1.231 section 6.1.2.2.1, G.706 section 4.1). Excessive
(exceeding the provisionable CRC error count) CRC errors may
optionally cause a reframe.
14
FRM_SLIPU
0
13
FRM_OOF
In ESF or J-ESF, more than 320 CRC-6 errors in 1 second
result in loss of frame alignment. The CRC error count is provi-
sionable.
In the CEPT CRC-4 multiframe formats, more than 915 CRC-4
errors in 1 second result in loss of frame alignment. (G.706 sec-
tion 4.3.2). The CRC error count is provisionable.
0