ACS8514 Semtech Corporation, ACS8514 Datasheet - Page 65

• Manufacturer Part Number: ACS8514
• Description: Synchronous Equipment Timing Source Partner IC for 2nd T4 Dpll, Accurate Monitoring & Input Extender
• Manufacturer: Semtech Corporation

Revision 3.00 April 2007 © Semtech Corp.
Address(hex): 64
Address(hex): 65
Register Name
Register Name
T4_meas_phas Set to 0
ADVANCED COMMS & SENSING
Bit No.
Bit No.
6, 2, 1
5,4,3
Bit 7
[2:0]
Bit 7
7, 3
6
5
4
7
0
cnfg_T4_DPLL_frequency
Auto_squelch_
T4
Description
Not used.
Auto_squelch_T4
Register bit to automatically squelch the T4 outputs
on TO1 and TO2 when the T4 inputs have failed.
AMI_op_duty
Register bit to configure whether the composite
clock output of TO2 is 50:50 or 5:8 duty cycle.
T4_op_SONSDH
Register bit to configure the BITS output on TO1 to
be either SONET or SDH frequency.
Check that register 35h, bit 4 is set to 0, otherwise
this bit is ignored and SONET/SDH selection for TO1
is controlled by register 34h, bit 2.
Default set by SONSDHB pin - same as register 34
bit 2.
T4_DPLL_frequency
Register to control the system clock driving the T4
DPLL
cnfg_T4_meas_phase
Description
T4_meas_phas
Register bit to control the feature to use the T4 path
to measure phase difference between the Monitor
DPLL input and the selected T4 input.
Set to 0
Not used.
Set to 1
Bit 6
Bit 6
AMI_op_duty
Bit 5
Bit 5
Description
T4_op_
SONSDH
Description
Bit 4
Bit 4
Page 65
FINAL
(R/W) Register to configure the
T4 DPLL and several other
parameters for the T4 path.
(R/W) Register to configure the
T4 phase detector to measure
the phase between 2 inputs
010- 111
Bit Value
Bit Value
Bit 3
Bit 3
000
001
0
1
0
0
1
0
1
0
1
0
1
-
Value Description
-
Outputs TO1 and TO2 enabled as in register 63h
Outputs TO1 and TO2 disabled when T4 inputs
fail.
TO2 output 50:50 duty cycle.
TO2 output 5:8 duty cycle.
TO1 output 2.048 MHz (SDH).
TO1 output 1.544 MHz (SONET).
T4 DPLL squelched (clock off).
T4 DPLL enabled (clock on).
Do Not Use
Normal- T4 Path normal operation.
T4 DPLL disabled, T4 phase detector used to
measure phase between selected Monitor
DPLL input and the selected T4 input.
-
-
-
Value Description
Set to 0
ACS8514 SETS Buddy
Bit 2
Bit 2
T4_DPLL_Enable
Default Value
Default Value
Set to 0
Bit 1
Bit 1
DATASHEET
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0000 0001
0000 0001
Set to 1
Bit 0
Bit 0