ACS8514T View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
ACS8514T
Synchronous Equipment Timing Source Partner IC for 2nd T4 DPLL, Accurate Monitoring & Input Extender
Semtech Corporation
'ACS8514T' PDF : 86 Pages View PDF
ACS8514 SETS Buddy
ADVANCED COMMS & SENSING FINAL
DATASHEET
Address(hex): 6A
Register Name Cnfg_T4_DPLL_damping
Description
Bit 7
Bit No.
7,3
[6:4]
[2:0]
Bit 6
Bit 5
Bit 4
Set to 0
Set to 0
Set to 1
Description
Not used.
Set to 001
T4_damping
Register to configure the damping factor of the T4
DPLL. The bit values corresponds to different
damping factors, depending on the bandwidth
selected. Damping factor of 5 being the default
(011).
The gain peak for the damping factors given in the
value description (right) are tabulated below.
Damping Factor
Gain Peak
1.2
0.4 dB
2.5
0.2 dB
5
0.1 dB
10
0.06 dB
20
0.03 dB
(R/W) Register to configure the
damping factor of the T4 DPLL
Bit 3
Bit 2
Default Value 0001 0011
Bit 1
Bit 0
T4_damping
Bit Value Value Description
-
-
001
-
T4 DPLL damping factor at the following
bandwidths frequency selections:
18 Hz
35 Hz
001
1.2
1.2
010
2.5
2.5
011
5
5
100
5
10
101
5
10
70 Hz
1
2.5
5
10
20
000
Not used.
110
Not used.
111
Not used.
Address(hex): 6B
Register Name Cnfg_Mon_DPLL_damping
Description
Bit 7
Bit No.
7,3
[6:4]
Bit 6
Set to 0
Description
Not used.
Set to 001
Bit 5
Set to 0
Bit 4
Set to 1
(R/W) Register to configure the Default Value
damping factor of the Monitor
DPLL, along with the gain of the
Phase Detector 2 in some modes.
Bit 3
Bit 2
Bit 1
0001 0011
Bit 0
Mon DPLL damping
Bit Value Value Description
-
-
001
-
[2:0]
Mon_DPLL_damping
Monitor DPLL damping factor at the following
Register to configure the damping factor of the
bandwidths frequency selections:
Monitor DPLL. The bit values corresponds to
<4 Hz 8 Hz 18 Hz 35 Hz 70 Hz
different damping factors, depending on the
001
5
2.5
1.2
1.2
1.2
bandwidth selected. Damping factor of 5 being the
010
5
5
2.5
2.5
2.5
default (011).
011
5
5
5
5
5
The gain peak for the Damping Factors given in the
100
5
5
5
10
10
Value Description (right) are as tabulated above in
101
5
5
5
10
20
the register 6A description.
.
000/110/111 Not used.
Revision 3.00 April 2007 © Semtech Corp.
Page 67
www.semtech.com
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