TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
572
Agere Systems Inc.
22 Cross Connect (XC) Block Functional Description
(continued)
The DS3/NSMI connectivity is established through a combination of DS3 specific MUXes controlled by registers
XC3_TPM_SRC (
Table 475 on page 331
) and XC3_MDS3_SRC (
Table 476 on page 332
), and special cases of
the DS1 cross connects controlled by XC_PDATA[1—29] (
Table 463 on page 328
) and XC_SYNC[1—29]
(
Table 477 on page 332
) bytes in the XC_PIND_SRC[1—15] (
Table 463
) and XC_PINS_SRC[1—14] (
Table 477
)
registers to accommodate the NSMI connectivity from the multifunction system interface to the SPE mapper or
M13.
Description of the DS3 connectivity will be presented in three sections: the test-pattern generator/monitor
(TPG/TPM), the DS3 basic connect, and the NSMI.
22.8.1 DS3 TPG/TPM Cross Connect
The DS3 test signals are routed through the XC3 crosspoint by programming register XC3_TPM_SRC, as shown
in
Figure 95
. For DS3 test signals, the TPG does not supply the source clock. Instead, a source clock and a clock
enable are provided from another block via the XC3 crosspoint. The TPG/TPM provide unframed test data that
may be connected to the SPE block for clear channel testing. For framed DS3 test data, the TPG/TPM are con-
nected to the NSMI interface in the M13 block and the M13 block DS3 interface provides the framed DS3 signal for
test purposes.
The DS3 TPG/TPM crosspoint’s connectivity is determined by a set of source3 identifiers (source3_IDs) for bits 5
and 6 of XC3_TSOURCE_ID in register XC3_TPM_SRC, as defined as follows:
where XC3_TSOURCE_ID is defined as follows:
* DS3 unframed single-rail (unipolar) non-return-to-zero (NRZ) data.
5-9193(F)
Figure 95. DS3 Test-Pattern Cross Connect
Bit
7
0
6
5
4
0
3
0
2
0
1
0
0
0
XC3_TSOURCE_ID
XC3_TSOURCE_ID
Index (Bits [6:5])
00
01
10
11
Block3 Identifier
TPM receives DS3 from external pin*.
TPG and TPM are connected to M13 through NSMI interface.
TPM receives DS3 from SPE.
Reserved.
TPG/TPM
XC
M13
SPE
EXTERNAL I/O
XC_TDATA
XC3_TPMCLK
XC3_TPMCLKEN
XC3_TPGCLK
XC3_TPGCLKEN
TPG_DATA
M13_NSMI_CLK
M13_NSMI_EN
XC3_NSMI_DATA
M13_DNSMI_CLK
M13_DNSMI_EN
M13_DNSMI_DATA
DS3POS_DATA_RX
DS3DATAOUTCLK
DS3POSDATAIN
DS3DATAINCLK
LINERXDATA[29]
1
1
XC3_TSOURCE_ID