QV301M2 Quadravox Inc, QV301M2 Datasheet - Page 3

• 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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-Perform the following for each recording:
-When all the messages have been recorded, set the record line high
-Wait for re-initialization (400ms maximum with 4004-16 device)
---done----
Note: If you have a switch or signal permanently connected to the REC_/INT_ line, it must be
open-circuit when inactive. Otherwise, the INT_ output of the ChipCorder can be damaged and at
a minimum, the signal will not be seen by the QV301m.
Playing messages:
In order to have as much addressing precision as possible from a small set of lines, several
modes have been provided. The idle state is defined as all inputs at a logical one. Typically, pull-
up resistors would be used to establish the resting state and switch closures would be made to
ground to initiate playback.
Use M0, M1 to select mode as described in “Setting the addressing mode”. The trigger lines T0-
T6 will be interpreted according to the mode.
Set the trigger line or lines low for at least 25ms (The QV301m has “debounce” logic to eliminate
spurious entries). The amplifier will be enabled and the selected file will be played. The amplifier
will then be disabled, as will the ChipCorder
To play the next message, you must release all trigger lines for at least 25ms, then repeat the
process.
The PWR_ line can be used to determine when the message is complete.
Power management:
The QV301m sends a power up command just prior to playback or the beginning of a recording
sequence. It sends a power down command after each playback and after the “set last” function
at the end of a recording session.
After each operation, the controller itself will power down to standby mode, but will check the
inputs every 18ms for an entry. This time is considered in the specification of minimum trigger
pulse width. System standby current will depend on the ISD device and amplifier as well. A
system based on the ISD4003 would have a typical standby current of 5uA plus that of the
amplifier, if any. This makes the QV301m ideal for battery operated systems.
Serial mode:
To set serial mode, trigger T4 must be connected to the PWR_ line.
By taking advantage of the ChipCorder’s
separate messages without explicit reference to physical addresses. Three phrase selection
modes are provided and are selected via a mode setting command. The addressing mode can be
changed at any time.
A single byte transfer (n,8,1, 9600B) selects one of 240 messages (subject to the constraints
explained later in this document). A code of 0fxh is interpreted as a set mode command. A byte in
the range 0-239 selects a single message in direct addressing mode, or determines the upper
Wait 50ms
Set T0 low for duration of first recording
Bring T0 high to set the individual end-of-message mark
2003
Quadravox, Inc
Quadravox, Inc
cueing mode, the QV301m can manage up to 240
device.
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