HT81003_00 データシートの表示（PDF） - Holtek Semiconductor

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HT81003_00

EasyVoice™ 3-Second Speech

Holtek Semiconductor 

Preliminary

HT81003/HT81R03

the playing order of the sections in the groups.

Notice that the total amount of sections in-

cluded in the groups should be less than 256

which is the space limitation of the function ta-

ble ROM.

· KEY1 as a direct key

Each key is mapped to a group in the

function table. If a key is not used, the group

mapped to that key is a piece of silence. The

following is an example of the function table:

Group 1 sec.1 + sec.2 + sec.3 + sec.4

Group 2 sec.3

As illustrated in the table, voice ROM is com-

posed of 4 sections, and 5 sections for the

function table. If KEY1 is momentarily trig-

gered, section 1, section 2, section 3 and sec-

tion 4 are played in sequence and then

stopped. Triggering KEY2 plays section 3.

· KEY1 as a sequential key

When KEY1 is optioned as a sequential key, it

can include multiple groups (sub-groups) in

the function table. However, KEY2 is used as a

direct key exclusively and comprise of only

one group in the function table.

An example is shown below:

Group 1-1 sec.4 + sec.2

Group 1-2 sec.1 + sec.3

:

:

:

:

Group 1-N sec.2 + sec.3

Group 2 sec.2 + sec.3

As indicated in the above table, KEY1 can be

made up of sub-groups. The corresponding

sub-groups is played in sequence each time

KEY1 is triggered.

¨ The playing sequence of sequential KEY1 is:

Group 1-1 ® Group 1-2 ® Group 1-3 ..... ®

Group 1-N (the last group) ® Group 1-1 .....

¨ Reset of KEY1 playing sequence

If a sub-group of KEY1 group is being played

and KEY2 is triggered, the playing

sub-group will be terminated, and the newly

triggered key group is played in stead. The

first sub-group will start playing by

retriggering KEY1. In other words, the

KEY1 playing sequence is reset whenever a

key other than KEY1 is triggered (see Figure

1).

¨ Sub-group selection

When KEY1 is triggered with pulses, a de-

sired sub-group can be selected by controlling

its corresponding pulse number. However,

the features of KEY1 have to be set in the fol-

lowing ways:

- sequential

- retriggerable

- minimum key debounce time

(@1.2ms, fOSC=2MHz)

For instance, if sub-group 1-3 is the previous

playing group, sub-group 1-5 will start playing

after 2 pulses are applied to KEY1, and so on.

To make a selection of KEY1 sub-groups more

easy, KEY2 should be programmed as silence.

Then this silence key has to be triggered to re-

set KEY1. By so doing, the playing sub-group

of KEY1 is directly specified by the pulse

number applied to KEY1 (see Figure 2).

· KEY2 as a stop key (by mask option)

When KEY2 functions as a stop key, any voice

output can be stopped by pressing KEY2.

KEY1

KEY2

AUD

G ro u p 1 -1

G ro u p 1 -2

G ro u p 1 -N G ro u p (2 ~ 8 ) G ro u p 1 -1

Figure 1. Reset of KEY1 playing sequence

6

July 24, 2000

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