PM73122 Datasheet, PDF (171/489 Pages) PMC-Sierra, Inc – 32 LINK CES/DBCES AAL1 SAR PROCESSOR

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DATASHEET
PMC-1981419
ISSUE 7
Table 8 Frequency Select – T1 Mode
PM73122 AAL1GATOR-32
32 LINK CES/DBCES AAL1 SAR PROCESSOR
Freq Select
M
N
Total # Cycles Frequency
-128
560
2432
2992
1.5436433121
-127
560
2432
2992
1.5436433121
-126
560
2432
2992
1.5436433121
-125
560
2432
2992
1.5436433121
…
…
…
…
…
-96
560
2432
2992
1.5436433121
-95
560
2433
2993
1.5436471447
-94
560
2434
2994
1.5436509747
-93
560
2435
2995
1.5436548021
-92
560
2436
2996
1.5436586271
…
…
…
…
…
-4
560
2524
3084
1.5439855782
-3
560
2525
3085
1.5439891871
-2
560
2526
3086
1.5439927937
-1
560
2527
3087
1.5439963980
0
560
2528
3088
1.5440000000
1
560
2529
3089
1.5440035997
2
560
2530
3090
1.5440071970
3
560
2531
3091
1.5440107921
4
560
2532
3092
1.5440143848
…
…
…
…
…
93
560
2621
3181
1.5443251545
94
560
2622
3182
1.5443285482
95
560
2623
3183
1.5443319399
96
560
2624
3184
1.5443353293
…
…
…
…
…
124
560
2624
3184
1.5443353293
125
560
2624
3184
1.5443353293
126
560
2624
3184
1.5443353293
127
560
2624
3184
1.5443353293
* Note that the synthesizers are limited internally to a freq select range of –96 to
96 in order to maintain a +/- 230 ppm range.
11.3.3.8.2 E1 Mode
In E1 mode the 2.048 MHz nominal frequency is synthesized by maintaining a
certain ratio of long cycles to short cycles. The long cycle is comprised of 19
SYS_CLK periods (38.88 MHz). The short cycle is comprised of 18 SYS_CLK
periods. For the nominal frequency in high resolution mode, the synthesis period
is comprised of 1024 cycles. 1008 of the 1024 cycles are long cycles and the
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