ds3104 Maxim Integrated Products, Inc., ds3104 Datasheet - Page 103

• Manufacturer Part Number: ds3104
• Description: Ds3104 Line Card Timing Ic With Synchronous Ethernet Support
• Manufacturer: Maxim Integrated Products, Inc.

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 6 to 4: Phase Detector 2 Gain 8kHz (PD2GA8K[2:0]). This field specifies the gain of the T4 phase detector 2
with an input clock of 8kHz or less. This value is only used if automatic gain selection is enabled by setting PD2EN
= 1 in the
Bits 2 to 0: Damping Factor (DAMP[2:0]). This field configures the damping factor of the T4 DPLL. Damping
factor is a function of both DAMP[2:0] and the T4 DPLL bandwidth
to a damping factor of 5. See Section 7.7.4.
The gain peak for each damping factor is shown below:
Rev: 012108
________________________________________________________________________________________ DS3104-SE
000, 110, and 111 =
DAMPING
FACTOR
1.2
2.5
10
20
T4CR3
5
001 =
010 =
011 =
100 =
101 =
—
register. See Section 7.7.5.
7
0
GAIN PEAK (dB)
6
0
0.06
0.03
0.4
0.2
0.1
18Hz
1.2
2.5
T4CR2
T4 Configuration Register 2
6Ah
5
5
5
PD2G8K[2:0]
{unused values}
5
0
35Hz
1.2
2.5
10
10
5
4
1
≥ 70Hz
1.2
2.5
10
20
5
(T4BW
—
3
0
register). The default value corresponds
2
0
DAMP[2:0]
1
1
103 of 136
0
1