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ST7540 数据表(PDF) 17 Page - STMicroelectronics

部件名 ST7540
功能描述  FSK power line transceiver
PDF  44 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST7540 数据表(HTML) 17 Page - STMicroelectronics

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ST7540
Functional description
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6.3
Mark and space frequencies
Mark and Space Communication Frequencies are defined by the following formula:
F ("0") = FCarrier + [
∆F]/2
F ("1") = FCarrier - [
∆F]/2
∆F is the Frequency Deviation.
With Deviation = “0.5” the difference in terms of frequency between the mark and space
tones is half the Baudrate value (
∆F=0.5*BAudrate). When the Deviation = “1” the difference
is the Baudrate itself (
∆F= Baudrate). The minimal Frequency Deviation is 600Hz.
Table 8. ST7540 synthesized frequencies
Carrier
frequency
(KHz)
Baud
rate
Deviation
Exact frequency
[Hz]
(Clock=16MHz)
Carrier
frequency
(KHz)
Baud
rate
Deviation
Exact frequency
[Hz]
(Clock=16MHz)
“1”
“0”
“1”
“0”
60
600
--
82.05
600
--
1
59733
60221
1
81706
82357
1200
0.5
59733
60221
1200
0.5
81706
82357
1
59408
60547
1
81380
82682
2400
0.5
59408
60547
2400
0.5
81380
82682
1
58757
61198
1
80892
83171
4800
0.5
58757
61198
4800
0.5
80892
83171
1
57617
62337
1
79590
84473
66
600
--
86
600
--
1
65755
66243
1
85775
86263
1200
0.5
65755
66243
1200
0.5
85775
86263
1
65430
66569
1
85449
86589
2400
0.5
65430
66569
2400
0.5
85449
86589
1
64779
67220
1
84798
87240
4800
0.5
64779
67220
4800
0.5
84798
87240
1
63639
68359
1
83659
88379
72
600
--
110
600
--
1
71777
72266
1
109701
110352
1200
0.5
71777
72266
1200
0.5
109701
110352
1
71452
72591
1
109375
110677
2400
0.5
71452
72591
2400
0.5
109375
110677
1
70801
73242
1
108724
111165
4800
0.5
70801
73242
4800
0.5
108724
111165
1
69661
74382
1
107585
112467



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