HT814D0 datasheet(7/15 Pages) HOLTEK

Part #	HT814D0

Description	8.4-Second LOG-PCM Speech

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

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HT814D0

7

March 15, 2000

Group

The HT814D0 plays groups according to the

key input. A group can be made up of one or

more sections. When a key is triggered, the cor-

responding group is played immediately. For

example, triggering KEY2 plays group 2, and so

on. The same section is allowed to appear in dif-

ferent groups. However, KEY1 can be made up

of multiple groups when it is optioned as a se-

quential or random key. Otherwise, each key is

composed of one group only.

Key function table

The sections in the voice ROM are played ac-

cording to the instructions of the key function

table. The function table contains group infor-

mation and the playing order of sections con-

tained in the groups. Notice that the total

number of sections included in the groups

should be less than 508-the space limitation of

the function table 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.5

Group 2

sec.3

Group 3

sec.2 + sec.2 + sec.3 + sec.4

Group 4

sec.5 + sec.3

As illustrated in the above table, the voice

ROM is composed of 5 sections and, 11 sec-

tions for the function table. If KEY1 is mo-

mentarily triggered, section 1, section 2,

section 3 and section 5 are played in sequence

and then stops. Triggering KEY2 plays sec-

tion 3, and so on.

· KEY1 as a sequential or random key

When KEY1 is optioned as a sequential or ran-

dom key, it can include multiple groups

(sub-groups) in the function table. However,

the remaining 11 keys (KEY2~KEY12) are

used as direct keys exclusively and comprise

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

Group 3

sec.3 + sec.5

Group 4

sec.1 + sec.5 + sec.2

As indicated in the above table, KEY1 can be

made up of sub-groups. Each time KEY1 is

triggered, the corresponding sub-groups are

played in sequence.

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