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PM73121 Datasheet(PDF) 121 Page - PMC-Sierra, Inc

Part # PM73121
Description  AAL1 Segmentation And Reassembly Processor
PDF  223 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM73121 Datasheet(HTML) 121 Page - PMC-Sierra, Inc

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PMC-Sierra, Inc.
PM73121 AAL1gator II
PMC-980620
,VVXH
AAL1 SAR Processor
Data Sheet
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Figure 69 shows the timing information for all AAL1gator II-initiated RAM write cycles.
Figure 69.
RAM Write Cycle Timing
Symbol
Parameter
Signals
Min
Max
Unit
Twc
Write cycle
/MEM_CS
Tp-2
ns
Twdh
Write data hold
MEM_DATA
Tp-Tch-10
ns
Twdsu
Write data setup
MEM_DATA
Tch - 4.3
ns
Twh
Write hold
/MEM_CS, MEM_ADDR,
/MEM_WE
Tp -Tch -10
ns
Twsu
Write setup
MEM_ADDR, /MEM_CS
1
ns
Twp
Write pulse width
/MEM_WE
Tch-1.3
Tch+0.3
ns
NOTES: • Tch and Tp are the clock high time and clock period as measured at 1.5 V. See Figure 80 on
page 119 and refer to section 8.6 “Board Requirements for the SRAM Interface” on page 174.
•
Test conditions are: /MEM_WE(0) and /MEM_WE(1) at 15 pF; and MEM_DATA, SP_
DATA_EN, SP_DATA_CLK, SP_DATA_DIR, and /MEM_CS at 30 pF; MEM_ADDR and
SP_ADDR_EN at 40 pF.
•
All outputs are measured at 1.5 V, -40 to 85
°C, 4.75 - 5.25 V.
Twh
Twc
Twsu
Twc
Twp
Twp
Twdsu
Twdh
MEM_ADDR(io)
/MEM_CS(o)
/MEM_WE(o)
MEM_DATA(io)



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