MSS0307 View Datasheet(PDF) - Mosel Vitelic, Corp
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MSS0307 Datasheet PDF : 39 Pages
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MOSEL VITELIC INC.
MSS0307/S0607/S0907/S1207/S1507/S1807
Terms
Retriggerable TG
Retriggerable TGm means the sentence
addressed by TGm could be retriggerred by other
TGs.
See Timing diagrams I & III. Of course, it can be
retriggered by itself. See Timing diagrams I.
Ramp up
When a sentence starts playing from silence, the
audio output (either Cout or V1, V2) starts from
zero current and ramps up to the half scale of full
audio output in 128 steps. These 128 steps' gaps
are uniform. After these 128 steps accomplished
the sentence sound data begins.
As this is hardware implement, the first data byte
of a sound file is asked to be center value. for 8 bit
PCM data file, the center value is 80h.
Herein zero output does not mean zero potential,
neither ground.
Ramp down
Whenever a sentence is played and finished, the
audio outputs (either Cout or V1, V2) try going
from last data down to zero.
There is an interval provided in width t PL.
Without redundant ramp down and up within this
interval, the audio output keeps at center value of
full audio signal. This is to keep the audio output
sounds continued if there comes a latter sentence.
This interval starts from the last data pixel to the
ramp down starts.
Because the output is kept at center value of full
audio signal, the last data pixel of a sound file is
recommended as center value. For 8 bit PCM
data file, the center value is 80h.
After this t PL interval finished and there comes no
new comer sentence, the audio output gradually
reduces in 128 steps from the center value of full
audio signal down to zero output.
Herein zero output does not mean zero potential,
neither ground.
Trigger
A trigger mentioned in this data sheet does mean
either a certain pin or an activated input signal. It
could be:
(1) a high signal to straight input
(2) a low signal to straight input
(3) a cross touch of a pin K and a pin RW.
This active-high pin is internal pull low and no latch.
This active-low pin is internal pull high and no latch.
Small Loop & Large Loop
This is a function belongs to OKY. OKY plays
many sentences, up to 32. User can play 1st
sentence through 32nd sentence if user selects
"large loop". At this time the sentence lst, 2nd, 3rd
and 4th may be triggerred by TGs.
User will play 16 sentences, from 17th through
32nd sentence, when user selects "small loop".
User may have less sentences triggered by OKY at
this selection. But user definitely can prevent those
OKY's sentences triggerred by TGs.
Cycle Loop
This is a count number ranges 1 through 32 which
defines the sentence range OKY will play. This
number is user definable and could be equal to or
less than sentence defined.
Continuous OKY & Home OKY
This is a function belongs to OKY and determines
the play sequence when the first OKY comes after
any other trigger addressing. The "continuous"
preserves the sequence while the "home"rewinds
to the very beginning. This very beginning means
either 17th sentence or 1st sentence which is
determined by Loop Size - small or large.
You will see a term S.W.A.I. in this data sheet, it
means sequence when after interrupt by other
trigger addressing.
Ramdom Play OKY
A trigger at OKY will play a sentence randomly out
from specified sentence group.
But not every mask option combination provides
random play. It is provided only when masked as
edge and unhold. It is regardless retrigger or not.
Herein sentence group is determined by cycle loop
and small / large loop.
Power on play
This function is not provided even have
appropriate wiring.
Active high and active low
An input pin can be masked as either active high
or active low.
Specifications subject to change without notice, contact your sales representatives for the most recent information.
(Preliminary)
5/39
PID247*** 09/96
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