TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
420
Agere Systems Inc.
18 SPE Mapper Functional Description
(continued)
Table 551. 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 162 on page 143
) after a number of consecutive frames (determined by the value
programmed in SPE_CNTDF3[3:0] (
Table 160 on page 142
)) 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]) change, a delta bit SPE_F3DMOND
(
Table 156 on page 136
) is set. The interrupt mask is in register bit SPE_F3DMONM (
Table 157 on page 138
).
The SPE mapper maintains a history of the previous valid F3 byte in SPE_F3DMON1[7:0] (
Table 162 on
page 143
).
Table 552. F3 Monitor
18.14.7 N1 Monitor
The SPE mapper stores the current value of the N1 byte in SPE_N1DMON[7:0] (
Table 162 on page 143
). This is
updated after a number of consecutive frames (determined by the value programmed in bits SPE_CNTDN1[3:0]
(
Table 160 on page 142
)) of identical N1 bytes, i.e., the 8-bit pattern must be identical for a number frames deter-
mined 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]) change, a delta bit SPE_N1DMOND
(
Table 156 on page 136
) is set. The interrupt generated by SPE_N1DMOND can be masked off by
SPE_N1DMONM (
Table 157 on page 138
).
Table 553. N1 Monitor
Name
Function
SPE_F2DMON0[7:0] (
Table 162 on page 143
)
SPE_F2DMON1[7:0] (
Table 162 on page 143
)
SPE_CNTDF2[3:0] (
Table 160 on page 142
)
SPE_F2DMOND (
Table 156 on page 136
)
SPE_F2DMONM (
Table 157 on page 138
)
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 162 on page 143
)
User Channel Current Consistent Value.
SPE_F3DMON1[7:0] (
Table 162 on page 143
)
User Channel Previous Consistent Value.
SPE_CNTDF3[3:0] (
Table 160 on page 142
)
SPE_F3DMOND (
Table 156 on page 136
)
SPE_F3DMONM (
Table 157 on page 138
)
Continuous N-Times Detect (3—15).
F3 Data Monitor Delta Bit.
F3 Data Monitor Mask Bit.
Name
Function
SPE_N1DMON[7:0] (
Table 162 on page 143
)
SPE_CNTDN1[3:0] (
Table 160 on page 142
)
SPE_N1DMOND (
Table 156 on page 136
)
SPE_N1DMONM (
Table 157 on page 138
)
Fault Location Current Consistent Value.
Continuous N-Times Detect (3—15).
N1 Data Monitor Delta Bit.
N1 Data Monitor Mask Bit.