PM7311 pmc-sierra, PM7311 Datasheet - Page 263

• Manufacturer Part Number: PM7311
• Description: Freedm 84a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021832, Issue 2
14
14.1 SBI Drop Bus Interface Timing
Functional Timing
Figure 37 T1/E1 Drop Bus Functional Timing
Figure 37 illustrates the operation of the SBI DROP BUS, using a negative justification on the
second to last V3 octet as an example. The justification is indicated by asserting DPL high during
the V3 octet. The timing diagram also shows the location of one of the tributaries by asserting
DV5 high during the V5 octet.
Figure 38 DS3 Drop Bus Functional Timing
Figure 38 shows three DS-3 tributaries mapped onto the SBI bus. A negative justification is
shown for DS-3 #2 during the H3 octet with DPL asserted high. A positive justification is shown
for DS-3#1 during the first DS-3#1 octet after H3 which has DPL asserted low.
DDATA[7:0]
DDATA[7:0]
REFCLK
REFCLK
C1FP
DDP
DPL
DV5
C1FP
DDP
DPL
DV5
C1
C1
···
···
···
···
···
···
FREEDM 84A1024L ASSP Telecom Standard Product Data Sheet
···
···
···
···
···
···
H3
H3
V3
H3
V3
DS-3 #1 DS-3 #2 DS-3 #3DS-3 #1
V3 DS0#4. V5 DS0#9.
Released
263