ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 24

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Table 14 Register Description (cont...)
Revision 2.00/January 2006 © Semtech Corp.
ADVANCED COMMUNICATIONS
05
06
08
09
Addr.
(Hex)
sts_interrupts
sts_T4_inputs
sts_operating_mode
Register Name
Bit 7
Bit 6
Bits (5:0) Unused.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bits (1:0) Unused.
This register holds the status flags of the T
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.
Bits (7:5) Unused.
Bit 4
=1
=0
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.
Bits (7:3) Unused.
Bits (2:0) State:
001
010
100
110
101
111
SEC2 valid change.
SEC1 valid change.
Operating mode.
Main ref failed.
Unused.
SEC4 valid change.
Unused.
SEC3 valid change.
T4 reference failed - no valid T
lock to source (default).
T4 reference good - valid T
Free-Run (default),
Holdover,
Locked,
Pre-locked,
Pre-locked2,
Phase lost.
FINAL
Page 24
Description
IN1
input available.
IN1
OUT4
input (SEC2 or SEC1), T4 DPLL cannot
reference. The alarm once set will
ACS8509 SETS
Default Value (Bin)
DATASHEET
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00000000
00000000
XXX10000
XXXXX001