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ACS8510 View Datasheet(PDF) - Semtech Corporation

Part Name
Description
MFG CO.
'ACS8510' PDF : 69 Pages View PDF
ACS8510 Rev2.1 SETS
ADVANCED COMMUNICATIONS
Table 12. Register Map Description (continued).
FINAL
Addr. Parameter Name
(Hex)
sts_T4_inputs
08
sts_operating_mode
09
sts_priority_table
0A
0B
Description
Default
Value (bin)
This register holds the status flags of the AMI inputs and the TOUT4 reference. The alarms once
set will hold their state until reset. Each bit may be cleared individually by writing a '1' to that bit,
thus resetting the interrupt. Writing '0's will have no effect. These bits can also generate
interrupts.
Bits (7:5) Unused.
Bit 4
=1
=0
Bit 3
=1
=0
Bit 2
=1
=0
Bit 1
=1
=0
Bit 0
=1
=0
T4 reference failed - no valid TIN1 input (<I_10>:<I_5>), T4 DPLL cannot lock
to source (default)
T4 reference good - valid TIN1 input available.
Ami2 Violation detected
Ami2 clear (default)
Ami2 Loss of signal
Ami2 clear (default)
Ami1 Violation detected
Ami1 clear (default)
Ami1 Loss of signal
Ami1 clear (default)
This read-only register holds the current operating state of the main state machine. Figure 11
shows how the values of the 'operating state' variable match with the individual states.
XXX10000
Bits (7:3) Unused.
Bits (2:0)
001
010
100
110
101
111
State
Free-Run (default)
Holdover
Locked
Pre-locked
Pre-locked2
Phase lost
This is a 16-bit read-only register.
XXXXX001
Bits (15:12) Third highest priority valid source: this is the channel number of the input reference
source which is valid and has the next-highest priority to the second-highest-priority valid
source.
Bits (11:8) Second highest priority valid source: this is the channel number of the input
reference source which is valid and has the next-highest priority to the highest-priority valid
source.
Bits (7:4) Highest priority valid source: this is the channel number of the input reference source
which is valid and has the highest priority - it may not be the same as the currently selected
reference source (due to failure history or changes in programmed priority).
Bits (3:0) Currently selected reference source: this is the channel number of the input reference
source which is currently input to DPLL.
Note that these registers are updated by the state machine in response to the contents of the
cnfg_ref_selection_priority register and the ongoing status of individual channels; channel
number '0000', appearing in any of these registers, indicates that no channel is available for
that priority.
Bits (7:4) Highest priority valid source (sts_priority_table bits (7:4))
Bits (3:0) Currently selected reference source (sts_priority_table bits (3:0))
Bits (7:4) 3rd-highest priority valid source (sts_priority_table bits (15:12))
Bits (3:0) 2nd-highest priority valid source (sts_priority_table bits (11:8))
00000000
00000000
Revision 2.00/September 2003 Semtech Corp.
28
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