H83637S Datasheet, PDF (296/418 Pages) Renesas Technology Corp – 8-Bit Microcomputer

11.4 Typical Use
Figure 11.5 shows an example of the use of the DTMF generator.
H8/3637S
TONED
24 kΩ
VT_ref
100 kΩ
P1₄
360 k Ω
2SC458
19
2 kΩ
20
+0.47 µF
DTMF
HA16808ANT
V_ref1
11
MUTE
Note: Numbers at ends of signal lines are pin numbers of HA16808ANT.
Figure 11.5 Connection to HA16808 ANT
11.5 Application Notes
When using the DTMF generator, note the following point:
Be sure that the DTLR setting (DTL4 to DTL0) matches the system clock frequency at the OSC
pins. Normal DTMF signal output frequencies will not be obtained unless the DTLR setting
matches the OSC frequency.
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