ACS8525T Semtech, ACS8525T Datasheet - Page 83

• Manufacturer Part Number: ACS8525T
• Description: Line Card Protection Switch for SONET/SDH Systems
• Manufacturer: Semtech

Address (hex):
Address (hex):
Revision 3.01/August 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Bit No.
Bit No.
Bit 7
[2:0]
Bit 7
[6:4]
7
3
6A (cont...)
6B
cnfg_DPLL2_damping
Description
DPLL2_damping
Register to configure the damping factor of DPLL2.
The bit values correspond to different damping
factors, depending on the bandwidth selected.
The Gain Peak for the Damping Factors given in the
Value Description (right) are tabulated below:
Damping Factor
cnfg_DPLL1_damping
Description
Not used.
DPLL1_PD2_gain_alog_8k
Register to control the gain of the Phase Detector 2
when locking to a reference of 8 kHz or less in
analog feedback mode. This setting is only used if
automatic gain selection is enabled in Reg. 6D Bit 7,
cnfg_DPLL1_PD2_gain.
Not used.
Bit 6
Bit 6
1.2
2.5
10
20
5
DPLL2_PD2_gain_alog_8k
DPLL1_PD2_gain_alog_8k
Bit 5
Bit 5
Description
Gain Peak
0.4 dB
0.2 dB
0.1 dB
0.06 dB
0.03 dB
Description
Bit 4
Bit 4
FINAL
Page 83
(R/W) Register to configure the
damping factor of DPLL2, along
with the gain of Phase Detector 2
in some modes.
(R/W) Register to configure the
damping factor of DPLL1, along
with the gain of the Phase
Detector 2 in some modes.
Bit Value
Bit Value
Bit 3
Bit 3
001
010
011
100
101
-
-
-
Value Description
Damping Factor
for Bandwidth
of 18 Hz:
1.2
2.5
5
5
5
Value Description
-
Gain value of the Phase Detector 2 when locking to
an 8 kHz reference in analog feedback mode.
-
Bit 2
Bit 2
DPLL2_damping
DPLL1_damping
Default Value
Damping Factor
for Bandwidth
of 35 Hz:
1.2
2.5
5
10
10
Default Value
ACS8525 LC/P
Bit 1
Bit 1
DATASHEET
www.semtech.com
0001 0011
Damping Factor
for Bandwidth
of 70 Hz:
1.2
2.5
5
10
20
0001 0011
Bit 0
Bit 0