ACS8522A View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8522A' PDF : 118 Pages View PDF
ACS8522A SETS LITE
ADVANCED COMMS & SENSING
Address (hex): 35
FINAL
DATASHEET
Register Name cnfg_T4_path
Description
Register to configure the inputs Default Value 0100 0000
and other features in the T4 path.
Bit 7
Bit 6
lock_T4_to_T0 T4_dig_feed-
back
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
T4_forced_reference_source
Bit 0
Bit No.
Description
Bit Value Value Description
7
6
[5:4]
[3:0]
lock_T4_to_T0
Bit selects either the T4 direct inputs, or T0 DPLL as
the input of the T4 path. This allows the T4 DPLL to
be used to produce different sets of frequencies to
the T0 DPLL but still maintain lock.
0
T4 path locks independently from the T0 path.
1
T4 DPLL locks to the output of the T0 DPLL.
T4_dig_feedback
Bit to select digital feedback mode for the T4 DPLL.
0
T4 DPLL in analog feedback mode.
1
T4 DPLL in digital feedback mode.
Not used.
-
-
T4_forced_reference_source
This field can be used to force the T4 DPLL to select
a particular input. A value of zero in this field allows
the T4 input to be selected automatically via the
priority and input monitoring functions.
0000
T4 DPLL automatic source selection.
0011
T4 DPLL forced to select input SEC1.
0100
T4 DPLL forced to select input SEC2.
1000
T4 DPLL forced to select input SEC3.
1001
T4 DPLL forced to select input SEC4.
All other values Not used.
Address (hex): 38
Register Name cnfg_dig_outputs_sonsdh
Description
Configures Digital1 and Digital2
output frequencies to be SONET
or SDH compatible frequencies.
Default Value
0000 1101*
Bit 7
Bit 6
dig2_sonsdh
Bit 5
dig1_sonsdh
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit No.
Description
Bit Value Value Description
7
Not used.
6
dig2_sonsdh
Selects whether the frequencies generated by the
Digital2 frequency generator are SONET derived or
SDH.
*Default value of this bit is set by the SONSDHB pin
at power-up.
-
-
1
Digital2 can be selected from 1544/3088/6176/
12352 kHz.
0
Digital2 can be selected from 2048/4096/8192/
16384 kHz.
Revision 1.00/September 2007 © Semtech Corp.
Page 62
www.semtech.com
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