HT814D0 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT814D0

8.4-Second LOG-PCM Speech

Holtek Semiconductor 

¨ 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 .....

¨ The playing sequence of random KEY1 is:

Group 1-3 ® Group 1-5 ..... ® Group 1-N ®

Group 1-3 ® Group 1-5 .....

That KEY1 functions as a random key is a

special case of sequential key, which com-

bines a particular arrangement of sub-group

playing sequence.

¨ Reset of KEY1 playing sequence

If a sub-group of KEY1 is playing and one of

KEY2~KEY12 is triggered, the playing

sub-group will be terminated, and the newly

triggered key group is played instead. 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.

¨ Sub-group selection

When KEY1 is triggered with pulses, the 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:

HT814D0

- Sequential or random

- Retriggerable

- Minimum key debounce time

(@700ms, fOSC=96kHz)

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 easy selection of KEY1 sub-groups,

one of KEY2~KEY12 should be programmed

as silence. Then this silence key has to be

triggered to reset KEY1. By so doing, the

playing sub-group of KEY1 is directly speci-

fied by the pulse number applied to KEY1

· KEY12 as a stop key (by mask option)

When KEY12 functions as a stop key, any

voice output can be stopped by pressing

KEY12.

· KEY1~KEY11 as a repeat key

KEY1~KEY11 all function as repeat keys if

one of the eleven keys is set as a repeat key. In

other words, once the mode of one of

KEY1~KEY11 is determined, the remaining

10 keys are set accordingly.

KEY1

K E Y 2~K E Y 12

AUD

G ro u p 1 -1

G ro u p 1 -2

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

Reset of KEY1 playing sequence

KEY1

K E Y 2~K E Y 12

( S ile n c e )

AUD

N p u ls e

M p u ls e

G ro u p 1 -N

KEY1 sub-group selection

G ro u p 1 -M

8

March 15, 2000

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