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APLUS

API8208A

Group Configuration

Voice within each group are combinations of different

fixed memory sections of up to 126 sections. These

sections are the fundamental voice building blocks for

arranging playback without limiting sequencing. This

provides flexibility and allows data to be re-used, beneficial

for applications with many repeated sounds or words.

An example of group configuration is illustrated below:

Group No.

Section Entry

Group 1

Sec 1 + Sec 2 + Sec 3 ……. Sec 109

Group 2

Sec 3 + Sec 2

Group 3

Sec 10 + Sec 11 + Sec 12

Group 4

Sec110 + Sec 10 + Sec 5

Group Configuration

The entry of sections for each group is truly random and

without limitation. However, there is a limit in the total

number of entries for eight groups, which is 992 in the

API8208A It is acceptable to allocate all entries into only

one group or distribute out to other groups. It depends on

how many groups of messages are required.

Programmable Options

Groups in API8208A can have independent options. They

include:

•

Edge or Level trigger

•

Unholdable or Holdable trigger

•

Retriggerable or non-retriggerable

•

Sequential or Random playback

•

LED1, LED2, Busy, and Stop pulse are configurable

•

Four selections in playback frequency

Selections in Triggering

The API8208A can be triggered in different ways, Edge or

Level trigger, Holdable or Unholdable, Retriggerable or

Non-retriggerable. The combinations of the triggering

options provide versatile playback.

By enabling Retrigger, the playback can be controlled in

Stop and Start mode. A trigger on any trigger pin will stop

the current message and start the next message immedi-

ately.

Selections in Playback Frequency

This option provides four choices for each group in

frequency which implies it is possible to have four

different sampling rates in one chip or one sample rate

with a different playback frequency. As a matter of fact,

the available choices are also dependent on the pullup

resistor value at the OSC pin. For example, if the

fundamental frequency choice is F, it can provide choices

in x1, x1-1/2, x2, x3.

Selections in Playback Mode

There are two playback modes, Sequential and Random

in the API8208A If the chip is programmed in Sequential

Mode, messages will playback in the order from Group 1

to Group 8 by triggering the SBT pin. If the chip is

programmed in Random Mode, messages will be played

back randomly by triggering the SBT pin.

Selections in Output Buffer

There are three independent output pins, OUT1, OUT2,

and OUT3, available for several combinations of LED1,

LED2, Stop Pulse, and Busy Signal for each group. The

following table illustrates the four different combinations.

OUT1

OUT2

OUT3

1.

LED1

Busy

LED2

2.

Stop

LED2

LED1

3.

Busy

LED1

Stop

4.

LED2

Stop

Busy

LED1 and LED2 are complemented outputs flashing at

approximately a 3 Hz rate. Stop pulse (STOP) gives a 15

ms positive pulse at the end of the playback for each

Group with option have or do not have the Stop pulse.

Busy is active high and Section dependent but not Group

dependent. Even if same section in different group may

have different output in Busy output. For instance, BUSY

can be high for Section 4 in Group 1 but low in Group 4.

BUSY can be used as a synchronous signal. During

standby mode all three outputs must be low.

Software Support

APLUS provides dedicated software to the customer. With

this tool, the customer can compose their own messages

and configure the chip to fit into their applications very

easily.