IDT82V3285DQ IDT, Integrated Device Technology Inc, IDT82V3285DQ Datasheet - Page 79
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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IN5_CNFG - Input Clock 5 Configuration
Programming Information
IDT82V3285
Address: 1FH
Type: Read / Write
Default Value: 0000XXXX
DIRECT_DIV
5 - 4
3 - 0
Bit
7
6
7
BUCKET_SEL[1:0]
IN_FREQ[3:0]
DIRECT_DIV
LOCK_8K
Name
LOCK_8K
6
Refer to the description of the LOCK_8K bit (b6, 1FH).
This bit, together with the DIRECT_DIV bit (b7, 1FH), determines whether the DivN Divider or the Lock 8k Divider is used for
IN5:
These bits select one of the four groups of leaky bucket configuration registers for IN5:
00: Group 0; the addresses of the configuration registers are 31H ~ 34H. (default)
01: Group 1; the addresses of the configuration registers are 35H ~ 38H.
10: Group 2; the addresses of the configuration registers are 39H ~ 3CH.
11: Group 3; the addresses of the configuration registers are 3DH ~ 40H.
These bits set the DPLL required frequency for IN5:
0000: 8 kHz.
0001: 1.544 MHz (when the IN_SONET_SDH bit (b2, 09H) is ‘1’) / 2.048 MHz (when the IN_SONET_SDH bit (b2, 09H) is ‘0’).
0010: 6.48 MHz.
0011: 19.44 MHz.
0100: 25.92 MHz.
0101: 38.88 MHz.
0110 ~ 1000: Reserved.
1001: 2 kHz.
1010: 4 kHz.
1011 ~ 1111: Reserved.
For IN5, the required frequency should not be set higher than that of the input clock.
The default value of these bits depends on the device application as follows:
In Master / Slave application, when the device is configured as the Master, the default value is ‘0001’; when the device is con-
figured as the Slave, the default value is ‘0010’.
BUCKET_SEL1
DIRECT_DIV bit
5
0
0
1
1
BUCKET_SEL0
4
LOCK_8K bit
0
1
0
1
79
IN_FREQ3
3
Description
IN_FREQ2
Both bypassed (default)
2
Lock 8k Divider
Used Divider
DivN Divider
Reserved
IN_FREQ1
1
IN_FREQ0
April 11, 2007
0
WAN PLL
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