QV301M2 Quadravox Inc, QV301M2 Datasheet - Page 6

• 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

__________________________________________
QV301m pinout and control lines:
Applications:
The QV301m is intended for message playback applications where the user requires the large
capacity of ISD’s serial interface ChipCorders , but does not want to develop custom
microprocessor algorithms to manage the devices.
custom real-time code on the host platform. When used in cueing mode, the ISD chips in this
series require either constant polling or an interrupt driven service routine for advancing to the
proper address. If used in address mode, they require that the microprocessor maintain an
address table with entries for each of the independently accessed phrases. The QV301m can
offload these functions as well as system power management from the main processor.
Limitations:
The QV301m is limited to 240 phrase selections in serial mode, 127 in parallel mode.
The minimum allowable phrase length is 200ms, which in practical terms means that the
minimum valid phrase length is more than a single segment for most ISD part types. This
restriction is due to the necessity of using a particularly short phrase as an end-of-project marker.
The QV301m uses ISD’s cueing mode for message management. Playback starting delay
depends on both the position of the data in the chip and the number of messages in the project.
Although the cueing mode scan runs 1600 time faster than normal chip speed, this still can
amount to 150ms for a four-minute chip. To this is added the overhead of restarting the scan after
each message is located. This delay complicates use of the QV301m for phrase concatenation,
but with care in the data preparation, some limited use is possible. Place all the frequently
concatenated sounds (e.g. numbers) at the beginning of the list, followed by ending phrase
segments, and finally by beginning phrase sections. This will optimize the allocation of the
unavoidable delays
The QV301m can also be used in conjunction with a host microprocessor in lieu of developing
Control lines
T0
T1/RXD
T2
T3/TXD
T4
T5/BUSY_
T6/RECLED_
REC_
M0
M1
PWR_
+9-18V
+3.6-5.5V
GND
GND
ANA_IN-
ANA_IN+
2003
Quadravox, Inc
Quadravox, Inc
pin
10
11
12
13
17
18
19
20
1
2
3
4
5
6
7
8
9
level
low
low
low
low
low
low
low
low
low
--
--
--
--
--
--
0
0
Function
trigger 0 in parallel mode
trigger 1 in parallel mode or RS232 receive line
trigger 2 in parallel mode
trigger 3 in parallel mode or RS232 transmit line
trigger 4 in parallel mode; strap to PWR_ for serial
trigger 5 in parallel mode or system busy in serial
trigger 6 in parallel mode or record LED out in serial
record enable for parallel manual recording
lsb of parallel mode selection; must be +5V or GND
msb of parallel mode selection; must be +5V or GND
BUSY_ in parallel mode.
power input for QV301m2, QV301m3
power input for QV301m4
system ground
system ground
line level analog input for recording (QV301m4 only)
line level analog input for recording
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