ACS8520T Semtech, ACS8520T Datasheet - Page 71

• Manufacturer Part Number: ACS8520T
• Description: Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
• Manufacturer: Semtech

Address (hex):
Address (hex):
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Bit No.
Bit No.
Bit 7
[7:4]
[3:0]
Bit 7
[7:4]
18
19
cnfg_ref_selection_priority
(1 & 2)
Description
cnfg_ref_selection_priority_2
This 4-bit value represents the relative priority of
input I2. 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.
cnfg_ref_selection_priority_1
This 4-bit value represents the relative priority of
input I1. 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.
cnfg_ref_selection_priority
(3 & 4)
Description
cnfg_ref_selection_priority_4
This 4-bit value represents the relative priority of
input I4. 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.
cnfg_ref_selection_priority_2
cnfg_ref_selection_priority_4
Bit 6
Bit 6
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 71
(R/W) Configures the relative
priority of input sources I1 and I2.
(R/W) Configures the relative
priority of input sources I3 and I4.
0001-1111
0001-1111
0001-1111
Bit Value
Bit Value
0000
0000
0000
Bit 3
Bit 3
Value Description
Input I2 unavailable for automatic selection.
Input I2 priority value.
Input I1 unavailable for automatic selection.
Input I1 priority value.
Value Description
Input I4 unavailable for automatic selection.
Input I4 priority value.
cnfg_ref_selection_priority_1
cnfg_ref_selection_priority_3
Bit 2
Bit 2
Default Value
Default Value
ACS8520 SETS
Bit 1
Bit 1
(T0)*
(T4)*
(T0)*
(T4)*
DATASHEET
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0011 0010
0000 0000
0101 0100
0000 0000
Bit 0
Bit 0