HT817D0 查看數據表（PDF） - Holtek Semiconductor
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HT817D0 Datasheet PDF : 15 Pages
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· 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 ta-
ble:
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, voice ROM is
composed of 5 sections and the function table
of 11 sections. If KEY1 is momentarily trig-
gered, section 1, section 2, section 3 and sec-
tion 5 are played in sequence and then
stopped. Triggering KEY2 plays section 3,
and so forth.
· 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.
HT817D0
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.
¨ 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.
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
Figure1 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
G ro u p 1 -M
Figure 2 KEY1 sub-group selection
7
March 15, 2000
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