ACS8526 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8526' PDF : 74 Pages View PDF
ACS8526 LC/P LITE
ADVANCED COMMUNICATIONS
Address (hex): 0D
Register Name sts_current_DPLL_frequency
[15:8]
FINAL
Description
(RO) Bits [15:8] of the current
DPLL frequency.
DATASHEET
Default Value 0000 0000
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bits [15:8] of sts_current_DPLL_frequency
Bit 1
Bit 0
Bit No.
Description
Bit Value Value Description
[7:0]
Bits [15:8] of sts_current_DPLL_frequency
The value in this register is combined with the value
in Reg. 0C and Reg. 07 to represent the current
frequency offset of the DPLL.
When Bit 4 (DPLL1_DPLL2_select) of Reg. 4B
(cnfg_registers_source_select) = 0 the frequency
for DPLL1 is reported.
When this Bit 4 = 1 the frequency for DPLL2 is
reported.
-
In order to calculate the ppm offset of the DPLL with
respect to the crystal oscillator frequency, the value
in Reg. 07, Reg. 0D and Reg. 0C need to be
concatenated. This value is a 2’s complement
signed integer. The value multiplied by
0.0003068 dec. will give the value in ppm offset
with respect to the XO frequency, allowing for any
crystal calibration that has been performed, via
cnfg_nominal_frequency, Reg. 3C and 3D. The
value is actually the DPLL integral path value so it
can be viewed as an average frequency, where the
rate of change is related to the DPLL bandwidth. If
Bit 3 of Reg. 3B is High then this value will freeze if
the DPLL has been pulled to its min or max
frequency.
Address (hex): 11
Register Name sts_reference_sources
SEC1 & SEC2
Description
Bit 7
Bit No.
[7:6]
5
[3:2]
1
0
Bit 6
Bit 5
No Activity
SEC2 Input
Bit 4
Description
Not Used
SEC2 Input Activity Alarm
Alarm indication from the activity monitors.
Not Used
SEC1 Input Activity Alarm
Alarm indication from the activity monitors.
Not Used
(RO except for test when R/W)
Reports any alarms active on
inputs.
Default Value 0010 0010
Bit 3
Bit 2
Bit 1
No Activity
SEC1 Input
Bit 0
Bit Value Value Description
-
-
0
No alarm (input valid).
1
Input has an active “no activity” alarm.
-
-
0
No alarm (input valid).
1
Input has an active “no activity” alarm.
-
-
Revision 4.01/June 2006 © Semtech Corp.
Page 35
www.semtech.com
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