82V3380PFG IDT, Integrated Device Technology Inc, 82V3380PFG Datasheet - Page 131
82V3380PFG
Manufacturer Part Number
82V3380PFG
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.82V3380PFG.pdf
(175 pages)
Specifications of 82V3380PFG
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
Compliant
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T0_HOLDOVER_MODE_CNFG - T0 DPLL Holdover Mode Configuration
T0_HOLDOVER_FREQ[7:0]_CNFG - T0 DPLL Holdover Frequency Configuration 1
Programming Information
Address: 5CH
Type: Read / Write
Default Value: 010001XX
IDT82V3380
Address: 5DH
Type: Read / Write
Default Value: 00000000
T0_HOLDOVER
MAN_HOLDOV
3 - 2
1 - 0
Bit
7 - 0
7
6
5
4
_FREQ7
Bit
ER
7
7
TEMP_HOLDOVER_MODE[1:0]
T0_HOLDOVER_FREQ[7:0] Refer to the description of the T0_HOLDOVER_FREQ[23:16] bits (b7~0, 5FH).
MAN_HOLDOVER
T0_HOLDOVER
AUTO_AVG
AUTO_AVG
READ_AVG
FAST_AVG
_FREQ6
Name
Name
6
6
-
T0_HOLDOVER
FAST_AVG
_FREQ5
Refer to the description of the FAST_AVG bit (b5, 5CH).
Refer to the description of the FAST_AVG bit (b5, 5CH).
This bit, together with the AUTO_AVG bit (b6, 5CH) and the MAN_HOLDOVER bit (b7, 5CH), determines a fre-
quency offset acquiring method in T0 DPLL Holdover Mode.
This bit controls the holdover frequency offset reading, which is read from the T0_HOLDOVER_FREQ[23:0] bits
(5FH ~ 5DH).
0: The value read from the T0_HOLDOVER_FREQ[23:0] bits (5FH ~ 5DH) is equal to the one written to them.
(default)
1: The value read from the T0_HOLDOVER_FREQ[23:0] bits (5FH ~ 5DH) is not equal to the one written to them.
The value is acquired by Automatic Slow Averaged method if the FAST_AVG bit (b5, 5CH) is ‘0’; or is acquired by
Automatic Fast Averaged method if the FAST_AVG bit (b5, 5CH) is ‘1’.
These bits determine the frequency offset acquiring method in T0 DPLL Temp-Holdover Mode.
00: The method is the same as that used in T0 DPLL Holdover mode.
01: Automatic Instantaneous. (default)
10: Automatic Fast Averaged.
11: Automatic Slow Averaged.
Reserved.
5
5
MAN_HOLDOVER
0
1
T0_HOLDOVE
READ_AVG
R_FREQ4
4
4
AUTO_AVG
131
0
1
TEMP_HOLDO
T0_HOLDOVE
VER_MODE1
R_FREQ3
don’t-care
3
3
Description
FAST_AVG
Description
don’t-care
TEMP_HOLDO
T0_HOLDOVE
VER_MODE0
0
1
R_FREQ2
2
2
SYNCHRONOUS ETHERNET WAN PLL
Frequency Offset Acquiring Method
Automatic Slow Averaged (default)
T0_HOLDOVE
R_FREQ1
Automatic Fast Averaged
Automatic Instantaneous
1
1
-
Manual
T0_HOLDOVE
R_FREQ0
May 19, 2009
0
0
-
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