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): 3C
Register Name cnfg_nominal_frequency
[7:0]
Bit 7
Bit 6
Bit 5
Description
Bit 4
(R/W) Bits [7:0] of the register
used to calibrate the crystal
oscillator used to clock the
device.
Bit 3
Bit 2
Default Value 1001 1001
Bit 1
Bit 0
cnfg_nominal_frequency_value[7:0]
Bit No.
Description
Bit Value Value Description
[7:0]
cnfg_nominal_frequency_value[7:0]
-
See register description of register 3D
(cnfg_nominal_frequency_value[15:8])
Address(hex): 3D
Register Name cnfg_nominal_frequency
[15:8]
Bit 7
Bit 6
Bit 5
Description
Bit 4
(R/W) Bits [15:8] of the register
used to calibrate the crystal
oscillator used to clock the
device.
Bit 3
Bit 2
Default Value 1001 1001
Bit 1
Bit 0
cnfg_nominal_frequency_value[15:8]
Bit No.
Description
Bit Value Value Description
[7:0]
cnfg_nominal_frequency_value[15:8]
This register is used in conjunction with register 3C
to be able to offset the frequency of the crystal
oscillator by up to +514 ppm and -771ppm. The
default value represents 0 ppm offset from 12.800
MHz.
This value is an unsigned integer.
-
In order to program the ppm offset of the crystal
oscillator frequency, the value in 3C and 3D hex
need to be concatenated. This value is a 2's
complement signed integer. The value multiplied
by 0.0196229 dec will give the value in ppm. To
calculate the absolute value, the default
(39321) needs to be subtracted.
Address(hex): 3E
Register Name cnfg_average_frequency
[7:0]
Bit 7
Bit 6
Bit 5
Bit No.
[7:0]
Description
average_frequency_value[7:0]
Description
Bit 4
(R/W) Bits [7:0] of the average
frequency register.
Bit 3
Bit 2
Default Value 0000 0000
Bit 1
Bit 0
cnfg_average_frequency[7:0]
Bit Value Value Description
-
See register 3F cnfg_average_frequency for
details.
Revision 3.00 April 2007 © Semtech Corp.
Page 48
www.semtech.com
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