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ML7344J датащи(PDF) 97 Page - List of Unclassifed Manufacturers

номер детали ML7344J
подробное описание детали  Sub-GHz band short range wireless transceiver IC
PDF  151 Pages
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производитель  ETC2 [List of Unclassifed Manufacturers]
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ML7344J датащи(HTML) 97 Page - List of Unclassifed Manufacturers

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●VCO low limit frequency setting
VCO low limit frequency can be set as described in the “channel frequency setting”. I is set to
[VCO_CAL_MIN_I:B1 0x4D] register, F is set to [VCO_CAL_MIN_FH:B1 0x4E], [VCO_CAL_MIN_FM:B1
0x4F], [VCO_CAL_MIN_FL:B1 0x50] in MSB – LSB order.
example) If operation low limit frequency is 426.6MHz, setting value should be lower than 400kHz. Then in
following example, low limit frequency is set to 426.MHz, master clock frequency is 26MHz.
I = 426MHz/26MHz (Integer part) = 16(0x10)
F =(426MHz/26MHz-16) * 2
20 (Integer part) = 403298 (0x062762)
Setting values for each register is as follows:
[VCO_CAL_MIN_I]
= 0x10
[VCO_CAL_MIN_FH]
= 0x06
[VCO_CAL_MIN_FM]
= 0x27
[VCO_CAL_MIN_FL]
= 0x62
●VCO upper limit frequency setting
VCO upper limit frequency is calculated as following formula, based on low limit frequency values and
[VCO_CAL_MAX_N:B1 0x51] register.
VCO calibration upper limit frequency =
VCO calibration low limit frequency (B1 0x4D-0x50) + ΔF(B1 0x51)
ΔF is defined in the table below
VCO_CAL_MAX_N[3:0]
ΔF[MHz]
0b0000
0
0b0001
0.8125
0b0010
1.625
0b0011
3.25
0b0100
6.5
0b0101
13
0b0110
26
0b0111
52
0b1000
82.875
0b1001
104
Other than above
prohibited



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