ACS8520T Semtech, ACS8520T Datasheet - Page 130
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ACS8520T
Manufacturer Part Number
ACS8520T
Description
Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
Manufacturer
Semtech
Datasheet
1.ACS8520T.pdf
(150 pages)
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Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
ph_offset_ramp
Register Name
Bit No.
Bit No.
Bit 7
[3:0]
Bit 7
[7:3]
2
1
7C (cont...)
7D
cnfg_sync_monitor
Description
Sync_reference_source
The external Sync reference can only be associated
with a particular input reference. When automatic
external Sync enabling is selected in Reg. 34 Bit 7,
the external Sync input will only be enabled when
locked to the selected source. This can be used to
associate the Frame Sync reference with a
reference clock for Master/Slave operation.
cnfg_interrupt
Description
Not used.
GPO_en
(Interrupt General Purpose Output). If the interrupt
output pin is not required, then setting this bit will
allow the pin to be used as a general purpose
output. The pin will be driven to the state of the
polarity control bit, int_polarity.
tristate_en
The interrupt can be configured to be either
connected directly to a processor, or wired together
with other sources.
Bit 6
Bit 6
Sync_monitor_limit
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 130
(R/W) Register to configure the
external Sync input monitor. It
also has a bit to control the phase
offset automatic ramping feature.
(R/W) Register to configure
interrupt output.
Bit Value
Bit Value
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Bit 3
Bit 3
0
1
0
1
-
Value Description
Not used.
External Sync associated with input I1.
External Sync associated with input I2.
External Sync associated with input I3.
External Sync associated with input I4.
External Sync associated with input I5.
External Sync associated with input I6.
External Sync associated with input I7.
External Sync associated with input I8.
External Sync associated with input I9.
External Sync associated with input I10.
External Sync associated with input I11.
External Sync associated with input I12.
External Sync associated with input I13.
External Sync associated with input I14.
Not used.
GPO_en
Value Description
-
Interrupt output pin used for interrupts.
Interrupt output pin used for GPO purpose.
Interrupt pin always driven when inactive.
Interrupt pin only driven when active, High-
impedance when inactive.
Sync_reference_source
Bit 2
Bit 2
Default Value
Default Value
tristate_en
ACS8520 SETS
Bit 1
Bit 1
DATASHEET
www.semtech.com
0010 1011
0000 0010
int_polarity
Bit 0
Bit 0
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