ACS8514T View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
ACS8514T
Synchronous Equipment Timing Source Partner IC for 2nd T4 DPLL, Accurate Monitoring & Input Extender
Semtech Corporation
'ACS8514T' PDF : 86 Pages View PDF
ACS8514 SETS Buddy
ADVANCED COMMS & SENSING FINAL
DATASHEET
Address(hex): 4B
Register Name cnfg_registers_source_select
Bit 7
Bit 6
Bit 5
Description
Bit 4
(R/W) Register to select the
source of many of the registers.
Bit 3
Bit 2
Default Value 0000 0000
Bit 1
Bit 0
T4orMon_select
frequency_measurement_channel_select
Bit No.
Description
Bit Value Value Description
[7:5]
Not used.
-
-
4
T4orMon_select
0
Monitor DPLL registers selected.
Bit to select between the Monitor DPLL and T4 DPLL
values for: registers 0A, 0B, 0C, 0D, 07, 18 to 1E,
1
T4 DPLL registers selected.
77 and 78
[3:0]
frequency_measurement_channel_select
0000
Not used- refers to no input channel.
Register to select which input channel the frequency
0001
Frequency measurement taken from input I1.
measurement result in register 4C is taken from.
0010
Frequency measurement taken from input I2.
0011
Frequency measurement taken from input I3.
0100
Frequency measurement taken from input I4.
0101
Frequency measurement taken from input I5.
0110
Frequency measurement taken from input I6.
0111
Frequency measurement taken from input I7.
1000
Frequency measurement taken from input I8.
1001
Frequency measurement taken from input I9.
1010
Frequency measurement taken from input I10.
1011
Frequency measurement taken from input I11.
1100
Frequency measurement taken from input I12.
1101
Frequency measurement taken from input I13.
1110
Frequency measurement taken from input I14.
1111
Not used- refers to no input channel.
Address(hex): 4C
Register Name sts_freq_measurement
Bit 7
Bit 6
Bit 5
Description
Bit 4
(R/W) Register from which the
frequency measurement result
can be read.
Bit 3
Bit 2
Default Value 0000 0000
Bit 1
Bit 0
freq_measurement_value
Bit No.
Description
Bit Value Value Description
[7:0]
freq_measurement_value
This represents the value of the frequency
measurement on the channel number selected in
register 4B. This value will represent the offset in
frequency from the external crystal oscillator .
Ensure register 48, bit 7 = 1
-
This is an 8-bit 2's complement signed integer.
To calculate the offset in ppm of the selected
input channel, this value should be multiplied by
3.81 ppm.
Revision 3.00 April 2007 © Semtech Corp.
Page 55
www.semtech.com
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