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RC8650 VOICE SYNTHESIZER
RC SYSTEMS
Enable Exception Dictionary (U)
The exception dictionary is enabled with this command. If the RC8650
is in Phoneme mode, or if an exception dictionary has not been loaded,
the command will have no effect. The exception dictionary can be dis-
abled by issuing one of the mode commands D, T, or C.
TONE GENERATION COMMANDS
Musical/Sinusoidal Tone Generators (J/nJ)
The musical and sinusoidal tone generators are activated with these
commands. Refer to Section 3 for more information.
DTMF Generator (n*)
The DTMF (Touch-Tone) generator generates the 16 standard tone
pairs commonly used in telephone systems. Each tone is 100 ms in
duration, followed by a 100 ms inter-digit pause—more than satisfying
telephone signaling requirements (both durations can be extended to
500 ms by setting the DDUR bit of the Protocol Options Register). The
mapping of the command parameter
n
to the buttons on a standard
telephone is shown in Table 2.11.
Figure 2.1. Synchronous Digital Audio Transfer Timing
Table 2.11. DTMF Dialer Button Map
The “pause” tone can be used to generate longer inter-digit delays
in phone number strings, or to create precise silent periods in the
RC8650’s output. The generator’s output level can be adjusted with
the Volume command (
n
V). DTMF commands may be intermixed with
text and other commands without restriction.