
TMXF28155/51 Super Mapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Preliminary Data Sheet
May 2001
414
Agere Systems Inc.
18 SPE Mapper Functional Description
(continued)
Table 539. F2 Monitor
18.14.6 Path User Byte F3 Monitor
The SPE mapper monitors the second path user channel in the F3 byte. The current value of the F3 byte is stored
in SPE_F3DMON0[7:0] (
Table 152 on page140
) after a number of consecutive frames (determined by the value
programmed in SPE_CNTDF3[3:0] (
Table 150
)) of identical F3 bytes has been received, i.e., the 8-bit pattern must
be identical for a number of frames, determined by SPE_CNTDF3[3:0], prior to updating SPE_F3DMON0[7:0].
Whenever the contents of the F3 byte monitor (SPE_F3DMON0[7:0]) changes, a delta bit SPE_F3DMOND
(
Table 146
) is set. The interrupt mask is in register bit SPE_F3DMONM (
Table 147
).
The SPE mapper maintains a history of the previous valid F3 byte in SPE_F3DMON1[7:0] (
Table 152
).
Table 540. F3 Monitor
18.14.7 N1 Monitor
The SPE mapper stores the current value of the N1 byte in SPE_N1DMON[7:0] (
Table 152
). This is updated after a
number of consecutive frames (determined by the value programmed in bits SPE_CNTDN1[3:0] (
Table 150
)) of
identical N1 bytes, i.e., the 8-bit pattern must be identical for a number frames determined by the value in register
bits SPE_CNTDN1[3:0] prior to updating the N1 register.
Whenever the contents of the N1 byte monitor (SPE_N1DMON[7:0]) changes, a delta bit SPE_N1DMOND
(
Table 146
) is set. The interrupt generated by SPE_N1DMOND can be masked off by SPE_N1DMONM
(
Table 147
).
Table 541. N1 Monitor
Name
Function
SPE_F2DMON0[7:0] (
Table 152
)
SPE_F2DMON1[7:0] (
Table 152
)
SPE_CNTDF2[3:0] (
Table 150
)
SPE_F2DMOND (
Table 146
)
SPE_F2DMONM (
Table 147
)
Fault Location Current Consistent Value.
Fault Location Previous Consistent Value.
Continuous N-Times Detect (3
—
15).
F2 Data Monitor Delta Bit.
F2 Data Monitor Mask Bit.
Name
Function
SPE_F3DMON0[7:0] (
Table 152
)
SPE_F3DMON1[7:0] (
Table 152
)
SPE_CNTDF3[3:0] (
Table 150
)
SPE_F3DMOND (
Table 146
)
SPE_F3DMONM (
Table 147
)
User Channel Current Consistent Value.
User Channel Previous Consistent Value.
Continuous N-Times Detect (3
—
15).
F3 Data Monitor Delta Bit.
F3 Data Monitor Mask Bit.
Name
Function
SPE_N1DMON[7:0] (
Table 152
)
SPE_CNTDN1[3:0] (
Table 150
)
SPE_N1DMOND (
Table 146
)
SPE_N1DMONM (
Table 147
)
Fault Location Current Consistent Value.
Continuous N-Times Detect (3
—
15).
N1 Data Monitor Delta Bit.
N1 Data Monitor Mask Bit.