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HD404618TF Datasheet(PDF) 67 Page - Renesas Technology Corp

Part # HD404618TF
Description  4-Bit Single-Chip Microcomputer
PDF  91 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404618TF Datasheet(HTML) 67 Page - Renesas Technology Corp

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HD404618 Series
65
VTref
GND
Time slots
1 2 3 4 5 6789 10
12
11
13 14 15 16
18 19
17
20 21 22 23 24 25 26 27 28 29 30 31 32
Figure 42 Waveform of Tone Output
Table 32 Frequency Deviation of the MCU from Standard DTMF Signals
Standard
DTMF (Hz)
MCU (Hz)
Deviation from
Standard (%)
R1
697
694.44
–0.37
R2
770
769.23
–0.10
R3
852
851.06
–0.11
R4
941
938.97
–0.22
C1
1,209
1,212.12
0.26
C2
1,336
1,333.33
–0.20
C3
1,477
1,481.48
0.30
C4
1,633
1,639.34
0.39
Note:
This frequency deviation value does not include the frequency deviation due to the oscillator
element. Also note that in this case the ratio of the high level and low level widths in the oscillator
waveform due to the oscillator element will be 50% : 50%.



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