ACS8525T Semtech, ACS8525T Datasheet - Page 84

• 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
DPLL2_PD2_
gain_enable
Bit No.
Bit No.
Bit 7
[2:0]
Bit 7
[6:4]
7
3
6B (cont...)
6C
cnfg_DPLL1_damping
Description
DPLL1_damping
Register to configure the damping factor of DPLL1.
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 the same as those
tabulated in the description for Reg. 6A.
cnfg_DPLL2_PD2_gain
Description
DPLL2_PD2_gain_enable
DPLL2_PD2_gain_alog
Register to control the gain of Phase Detector 2
when locking to a reference, higher than 8 kHz, in
analog feedback mode. This setting is not used if
automatic gain selection is disabled in Bit 7,
DPLL2_PD2_gain_enable.
Not used.
Bit 6
Bit 6
DPLL1_PD2_gain_alog_8k
DPLL2_PD2_gain_alog
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 84
(R/W) Register to configure the
damping factor of DPLL1, along
with the gain of the Phase
Detector 2 in some modes.
(R/W) Register to configure the
gain of Phase Detector 2 in some
modes for DPLL2.
Bit Value
Bit Value
Bit 3
Bit 3
001
010
011
100
101
0
1
-
-
Value Description
Damping Factor
for Bandwidth
of 18 Hz:
1.2
2.5
5
5
5
Value Description
DPLL2 Phase Detector 2 not used.
DPLL2 Phase Detector 2 gain enabled and choice of
gain determined according to the locking mode:
- digital feedback mode
- analog feedback mode
- analog feedback at 8 kHz.
Gain value of Phase Detector 2 when locking to a
high frequency reference in analog feedback mode.
-
Bit 2
Bit 2
DPLL2_PD2_gain_digital
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
1100 0010
Bit 0
Bit 0