ACS8520T Semtech, ACS8520T Datasheet - Page 75

• 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
[3:0]
Bit 7
[7:4]
1D (cont...)
1E
cnfg_ref_selection_priority
(11 & 12)
Description
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.
cnfg_ref_selection_priority
(13 & 14)
Description
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.
cnfg_ref_selection_priority_12
cnfg_ref_selection_priority_14
Bit 6
Bit 6
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 75
(R/W) Configures the relative
priority of input sources I11 and
I12.
(R/W) Configures the relative
priority of input sources I13 and
I14.
0001-1111
0001-1111
Bit Value
Bit Value
0000
0000
Bit 3
Bit 3
Value Description
Input I11 unavailable for automatic selection.
Input I11 priority value.
Value Description
Input I14 unavailable for automatic selection.
Input I14 priority value.
cnfg_ref_selection_priority_11
cnfg_ref_selection_priority_13
Bit 2
Bit 2
Default Value
Default Value
ACS8520 SETS
Bit 1
Bit 1
(T0)*
(T4)*
(T0)*
(T4)*
DATASHEET
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1101 1100
0000 0000
1111 1110
0000 0000
Bit 0
Bit 0