ACS8509 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8509' PDF : 68 Pages View PDF
ACS8509 SETS
ADVANCED COMMUNICATIONS
Table 14 Register Description (cont...)
FINAL
DATASHEET
Addr.
(Hex)
Register Name
05 sts_interrupts
06
08 sts_T4_inputs
Description
Default Value (Bin)
Bit 7
SEC2 valid change.
Bit 6
SEC1 valid change.
Bits (5:0) Unused.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bits (1:0)
Operating mode.
Main ref failed.
Unused.
SEC4 valid change.
Unused.
SEC3 valid change.
Unused.
This register holds the status flags of the TOUT4 reference. The alarm once set will
hold its state until reset. The bit may be cleared by writing a “1” to it, thus resetting
the interrupt. Writing “0”s will have no effect. This bit can also generate an nterrupt.
00000000
00000000
09 sts_operating_mode
Bits (7:5) Unused.
Bit 4
=1
T4 reference failed - no valid TIN1 input (SEC2 or SEC1), T4 DPLL cannot
lock to source (default).
=0
T4 reference good - valid TIN1 input available.
Bits (3:0) Unused.
This read-only register holds the current operating state of the main state machine.
Figure 10 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.
XXXXX001
Revision 2.00/January 2006 © Semtech Corp.
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