Data Sheet
June 2002
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
(continued)
TPG
TPG_DATA[4]
TPG_CLK[4]
XC
XC2
EXTERNAL I/O
LINERXDATA
M23_DS2_DATA
XC2 MDS2M23DATA[1—7][7:0]
TPG—SOURCE_ID = 00
CHANNEL_ID = 4—DS2 DATA
CHANNEL_ID = 5—DS2 IDLE
EXT I/O—SOURCE_ID = 11
CHANNEL_ID = 1 TO 29—
PIN SELECT
BUNDLED SIGNALS
M13
M23_DS2_CLOCK
LINERXSYNC
M23_DS2_STUFF
REQUEST
LINERXCLK
XC_ALCO[1—29][7:0]
SOURCE_ID = 000
CHANNEL_ID =*
M23_DS2_CLOCK_OUT
(DEMUX FROM DS3)
REGISTER BIT XC_DS2ALCOEN
0 = DS2 EXTERNAL CLOCK IN
1 = DS2 M23 DEMUX CLOCK OUT
* = Channel ID
from
.
XC1
5-9190(F)r.3
Figure 92. M23 DeMUX DS2 Output Cross Connect
22.7.5 M23 MUX (Transmit Path)
The M23 MUX assembles seven DS2s into a DS3 signal. The routing of the DS2 data and clock inputs to the M23
MUX is shown in
Two modes of operation are available and selected with bit
XC_DS2ALCOEN (Table
The first mode routes DS2 data and clock from device inputs to the
M23 (XC_DS2ALCOEN = 0). The second mode cross connects a DS2 clock out to an external I/O pin that is used
by the external application to provide DS2 data and a stuff request to the Supermapper input pins for the M23
(XC_DS2ALCOEN = 1). The first mode determines the appropriate standards-based stuff times internally, ignoring
the external stuff request, and the second mode determines the stuff times from the external application.
The DS2 data, clock, and stuff request inputs to the M23 are cross connected by programming
XC2_MDS2M23DATA[1—7] (Table
bytes in XC2_M23_SRC[1—7] registers with the source ID
= 11 and a channel select value of 1 to 29. The channel select value of 1 to 29 selects the data, clock, and stuff
request signals from the external I/O device pins LINERXDATA[1—29], LINERXCLK[1—29], and LINERX-
SYNC[1—29], respectively.
For example, to cross connect DS2 data from LINERXDATA[6], DS2 clock from LINERXCLK[6], and stuff request
from LINERXSYNC[6] to the inputs of M23 number 3, program the XC2_MDS2M23DATA3 byte in register
XC2_M23_SRC3, with a source ID = 11 and a channel select = 6. XC2_MDS2M23DATA3 = 01100110 (binary).
If XC_DS2ALCOEN = 1, the cross connect for the DS2 clock output must be programmed into the
XC_ALCO[1—29] byte in the XC_ALCO_SRC[1—15] registers. The source ID = 000 and the channel ID select
have a value between 17 and 23 (decimal) to select DS2 DeMUX 1 to 7, respectively.
Agere Systems Inc.
569
ETC [ ETC ]
