IDT82V3355TF IDT, Integrated Device Technology Inc, IDT82V3355TF Datasheet - Page 53

• Manufacturer Part Number: IDT82V3355TF
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT82V3355TF

• Function: Wan PLL
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: TQFP
• Pin Count: 64
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

NOMINAL_FREQ[7:0]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 1
NOMINAL_FREQ[15:8]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 2
NOMINAL_FREQ[23:16]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 3
Programming Information
Address: 04H
Type: Read / Write
Default Value: 00000000
IDT82V3355
Address: 05H
Type: Read / Write
Default Value: 00000000
Address: 06H
Type: Read / Write
Default Value: 00000000
7 - 0
7 - 0
7 - 0
Bit
Bit
Bit
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE23
Q_VALUE15
Q_VALUE7
NOMINAL_FREQ_VALUE[7:0] Refer to the description of the NOMINAL_FREQ_VALUE[23:16] bits (b7~0, 06H).
NOMINAL_FREQ_VALUE[23:16]
NOMINAL_FREQ_VALUE[15:8] Refer to the description of the NOMINAL_FREQ_VALUE[23:16] bits (b7~0, 06H).
7
7
7
Name
Name
Name
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE22
Q_VALUE14
Q_VALUE6
6
6
6
The NOMINAL_FREQ_VALUE[23:0] bits represent a 2’s complement signed integer. If the value is multiplied by
0.0000884, the calibration value for the master clock in ppm will be gotten.
For example, the frequency offset on OSCI is +3 ppm. Though -3 ppm should be compensated, the calibration value is
calculated as +3 ppm:
3 ÷ 0.0000884 = 33937 (Dec.) = 8490 (Hex);
So ‘008490’ should be written into these bits.
The calibration range is within ±741 ppm.
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE21
Q_VALUE13
Q_VALUE5
5
5
5
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE20
Q_VALUE12
Q_VALUE4
4
4
4
53
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE19
Q_VALUE11
Q_VALUE3
3
3
3
Description
Description
Description
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE18
Q_VALUE10
Q_VALUE2
2
2
2
SYNCHRONOUS ETHERNET WAN PLL
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE17
Q_VALUE1
Q_VALUE9
1
1
1
NOMINAL_FRE
NOMINAL_FRE
NOMINAL_FRE
Q_VALUE16
Q_VALUE0
Q_VALUE8
May 19, 2009
0
0
0