IDT82V3285DQ IDT, Integrated Device Technology Inc, IDT82V3285DQ Datasheet - Page 85
IDT82V3285DQ
Manufacturer Part Number
IDT82V3285DQ
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.IDT82V3285DQ.pdf
(143 pages)
Specifications of IDT82V3285DQ
Function
Wan PLL
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Package Type
TQFP
Pin Count
100
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
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7.2.4
FREQ_MON_FACTOR_CNFG - Factor of Frequency Monitor Configuration
ALL_FREQ_MON_THRESHOLD_CNFG - Frequency Monitor Threshold for All Input Clocks Configuration
Programming Information
IDT82V3285
Address: 2FH
Type: Read / Write
Default Value: XXXX0011
Address: 2EH
Type: Read / Write
Default Value: XXXX1011
7 - 4
3 - 0
7 - 4
3 - 0
Bit
Bit
7
-
7
-
INPUT CLOCK QUALITY MONITORING CONFIGURATION & STATUS REGISTERS
ALL_FREQ_HARD_THRESHOLD[3:0]
FREQ_MON_FACTOR[3:0]
6
-
Name
6
-
-
Name
-
5
-
Reserved.
These bits determine a factor. The factor has a relationship with the frequency hard alarm threshold in ppm (refer to
the description of the ALL_FREQ_HARD_THRESHOLD[3:0] bits (b3~0, 2FH)) and with the frequency of the input
clock with respect to the master clock in ppm (refer to the description of the IN_FREQ_VALUE[7:0] bits (b7~0, 42H)).
The factor represents the accuracy of the frequency monitor and should be set according to the requirements of differ-
ent applications.
0000: 0.0032.
0001: 0.0064.
0010: 0.0127.
0011: 0.0257.
0100: 0.0514.
0101: 0.103.
0110: 0.206.
0111: 0.412.
1000: 0.823.
1001: 1.646.
1010: 3.292.
1011: 3.81. (default)
1100 - 1111: 4.6.
5
-
4
Reserved.
These bits represent an unsigned integer. The frequency hard alarm threshold in ppm can be calculated as
follows:
Frequency Hard Alarm Threshold (ppm) = (ALL_FREQ_HARD_THRESHOLD[3:0] + 1) X
FREQ_MON_FACTOR[3:0] (b3~0, 2EH)
This threshold is symmetrical about zero.
-
ALL_FREQ_HARD_
4
-
THRESHOLD3
3
85
FREQ_MON_F
ACTOR3
3
ALL_FREQ_HARD_
THRESHOLD2
Description
2
FREQ_MON_F
Description
ACTOR2
2
ALL_FREQ_HARD_
THRESHOLD1
FREQ_MON_F
1
ACTOR1
1
ALL_FREQ_HARD_
THRESHOLD0
FREQ_MON_F
April 11, 2007
ACTOR0
0
0
WAN PLL
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