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ACS8520A Datasheet(PDF) 75 Page - Semtech Corporation

Part # ACS8520A
Description  Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

ACS8520A Datasheet(HTML) 75 Page - Semtech Corporation

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ACS8520A SETS
ADVANCED COMMS & SENSING
FINAL
DATASHEET
Revision 1.00/September 2007 © Semtech Corp.
Page 75
www.semtech.com
.
[3:0]
cnfg_ref_selection_priority_11
This 4-bit value represents the relative priority of
input I11. The smaller the number, the higher the
priority; zero disables the input.
*The priority of input I11 depends on the value of
the MASTSLVB pin at power-up. If MASTSLVB is High
(master) at power-up, then the priority will default to
12. If MASTSLVB is Low (slave) at power-up, then
the priority will default to 1.
*When Bit 4 (T4_T0_select) of Reg. 4B
(cnfg_registers_source_select) = 0 the priority for
the T0 path is configured.
When this Bit 4 = 1 the priority for the T4 path is
configured.
0000
0001-1111
Input I11 unavailable for automatic selection.
Input I11 priority value.
Address (hex):
1E
Register Name cnfg_ref_selection_priority
(13 & 14)
Description
(R/W) Configures the relative
priority of input sources I13 and
I14.
Default Value
(T0)*
(T4)*
1111 1110
0000 0000
Bit 7Bit 6
Bit 5Bit 4
Bit 3
Bit 2Bit 1Bit 0
cnfg_ref_selection_priority_14
cnfg_ref_selection_priority_13
Bit No.
Description
Bit Value
Value Description
[7:4]
cnfg_ref_selection_priority_14
This 4-bit value represents the relative priority of
input I14. The smaller the number, the higher the
priority; zero disables the input.
*When Bit 4 (T4_T0_select) of Reg. 4B
(cnfg_registers_source_select) = 0 the priority for
the T0 path is configured.
When this Bit 4 = 1 the priority for the T4 path is
configured.
0000
0001-1111
Input I14 unavailable for automatic selection.
Input I14 priority value.
Address (hex):
1D (cont...)
Register Name cnfg_ref_selection_priority
(11 & 12)
Description
(R/W) Configures the relative
priority of input sources I11 and
I12.
Default Value
(T0)*
(T4)*
1101 1100
0000 0000
Bit 7Bit 6
Bit 5Bit 4
Bit 3
Bit 2Bit 1Bit 0
cnfg_ref_selection_priority_12
cnfg_ref_selection_priority_11
Bit No.
Description
Bit Value
Value Description


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