QV301M2 Quadravox Inc, QV301M2 Datasheet - Page 2

• Manufacturer Part Number: QV301M2
• Description: SOUND MOD PAR/SER CTRL W/22W AMP
• Manufacturer: Quadravox Inc

Specifications of QV301M2

• Module/board Type: Sound Board
• For Use With/related Products: QV301M2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Seven pins are available for message selection. Depending on addressing mode, these pins can
select one of seven or one of 127 messages, or determine the upper bound of a group of
sequentially (optionally, randomly) played messages. If the recording has been made to suit (see
Recording), the system can automatically detect the number of messages and define its own
maximum upper bound. On special order, these pins plus ground can form a 4x4 scan matrix to
select one of 16 messages.
Setting the addressing mode:
The QV301m offers two independent options for playback addressing. In order to leave the
maximum possible pins for user controls, the mode setting is accomplished by biasing the mode
pins, M0 and M1, with large value resistors within the module. This method allows the two lines to
also be used as control lines for the ISD ChipCorder . The mode pins are read continuously, so
it is possible to use all four modes in an application.
M1 determines whether the phrase selection is to be used directly or as the upper limit for a
random selection. Connecting M1 to ground will cause the trigger input to be used directly.
Connecting M1 to Vdd will cause the QV301m to make a random selection of all phrases with a
value less than or equal to the trigger value.
If M0 is connected to Vdd, the unit will interpret the trigger lines as a direct selection of up to eight
phrases. If M0 is connected to ground, the unit will interpret the trigger lines as a code from 0 to
126 (all ones, or code 127, is the inactive state). The lines forming the code must be synchronous
within 10ms to be correctly interpreted. If a code is selected which is greater than the actual
number of phrases present, the last phrase will be played. Coded addresses can be used even
by simple mechanical systems by employing a diode matrix or simple logic to create the codes.
For example, to have four phrases triggered by specific events and a different set of four
randomly selected by a fifth event, do the following:
- Specify the “random” option when ordering the devices.
- Record the phrases in order with the four randomly selected ones as the first four in the list.
- Assuming button mode (M0=1), set M1=0. Triggers 4-7 will now select the upper four phrases
directly.
- Set M1=1.Trigger 3 then causes a sequentially selected one of the first four phrases to be
spoken.
Of course, there can be an overlapping of the two categories, simply by choosing a higher valued
trigger pin for the sequential event.
The same logic applies in coded mode but gives access to up to 127 messages.
Recording messages:
The primary function of the QV301m is to manage message playback. The recording function is
intended to be used only to set up the system initially and is fairly rigidly constrained. Messages
must be recorded in the order they are to be selected, that is, from number 0 to n, and must all be
recorded in the same session, then completed by resetting the record line to inactive. This will
automatically place an end-of-project mark (a very short file). Quadravox provides the QV300S2
software and (optionally) hardware to perform this operation, but it is simple enough to be done
even with a couple of push-buttons, as follows:
-Connect power and a signal source to the system, observing the level and coupling requirements
shown in figure 2. The mode selection is ignored during recording.
-Set the INT_/REC_ line low for at least 200ms
2003
Quadravox, Inc
Quadravox, Inc
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