MSS0307-1 MOSEL [Mosel Vitelic, Corp], MSS0307-1 Datasheet - Page 4

• Manufacturer Part Number: MSS0307-1
• Description: 3/ 6/ 9/ 12 / 15 / 18 VOICE ROM
• Manufacturer: MOSEL [Mosel Vitelic, Corp]

(Preliminary)
Specifications subject to change without notice, contact your sales representatives for the most recent information.
Signals
Cout
Cout is tristate during standby.
Cout has zero current output when sound data is
zero. Cout has full current output when sound
data is the highest. Cout has half of full current
output when sound is silence at middle data value.
Cout has half of full current output when playing
sound at appended memory-less mute.
Ico of Cout behaves two different characteristics
shown as curve 2 and curve 3.
recommended when operating at 2.5V through
5.0V. Curve 2 is recommended when operating at
5.0V through 6.0V.
The bypass Cout Resistor (named R2) is used to
bypass the audio output current from Cout. This
bypassing extra current to ground gives a way to
prevent the saturation of audio waveform amplified
by transistor. This Resistance of R2 is 470 ohm
typically. It always is not very small. Or user can
let it open if the transistor has a fair beta value.
Due to Cout depends on Vdd bias very much, this
R2 resistance needs be very carefully selected
when user supplies the voltage potential source in
poor flatness or in poor drive capability.
What the poor source means either its potential
drops as the load varies or its potential drops as its
capacity exhausted.
A transistor with beta value 150 is sufficient for
typical applications. Larger beta value get larger
sound but may have the amplified waveform
saturated.
8 ohm speaker is recommended. The speaker
characeristics and housing impacts the loudness
very much.
When user is using variable loudness, user must
carefully calculate the bypass resistance R2 and
transistor's beta value due to that the current from
Cout may vary very much due to user's specified
loudness variance.
V1, V2
They are tristate during standby state.
These two pins can drive buzzer directly. The
piezo buzzer used should have its resonant
frequency at the center of your sound frequency
domain or you are unable to play your sound good
by this buzzer.
For instance, you have your sound spans over
frequency from 100 Hz through 1 KHz. A buzzer
with resonant frequency at 300 Hz will play this
sound good. A buzzer with resonant frequency at
1 KHz will distort the sound very much because
that most of the energy of the playback sound is
unable to be played by this buzzer.
MOSEL VITELIC INC.
Curve 3 is
MSS0307/S0607/S0907/S1207/S1507/S1807
4/39
OS, OW, OX, OY, OZ
There are 5 output pins provided. Each pin can
perform its performance independent on other four
pins.
An output pin can be masked to perform one out of
15 features per entry. But it has restriction : a pin
can perform up to 8 features only at a mask code.
These 8 features should not have too far
relationships.
Contact our sales representatives if you want to
use diverse output performance.
Rosc
This is a pin to provide bias to activate built in
VCO circuit. A 600 K ohm resistor serial from Vdd
to this pin (named R1) can play the audio output at
6 KHz sample rate at pitch option 4.
Resistance provided at this location plays lower
sample rate. A 240 Kohm resistor plays 15 KHz
sample rate at same condition.
The Vdd bias has very less impact on the
relationship between Rosc and sample rate. To
play 6 KHz, user needs 600 K ohm at 3 Vdd and
590 K ohm at 6 Vdd. To play 15 KHz, user needs
240 K ohm at 3 Vdd and 230 K ohm at 6 Vdd.
K1, K2, K3, K4
These four pins have two ways to perform.
To cooperate with RW1, RW2, RW3 and RW4,
they form a 4 x 4 matrix in 16 cross points. The
touch of a cross point will pass signal from a RW
pin to this K pin and activates a trigger signal to
play respectively sentence.
To not cooperate with RWn, these K pins can act
as straight trigger and work standalone. A Vdd
provided to Kn can play sentence.
RW1, RW2, RW3, RW4
These four pins can cooperate with Kn pins to form
a 4 x 4 matrix in 16 cross points. The touch of a
cross point passes signal from this RW pin to K
pin(s) and activates a trigger signal to play
corresponding sentence.
The result to be played is not guaranteed when
operating at below three conditions:(1) All four
RWn signal pins tied together, (2) Any three RWn
signal pins connected together, (3) Any two RWn
signal pins connected together. The result may
even be no sound played.
PID247*** 09/96
Larger