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HT814D0 Datasheet(PDF) 7 Page - Holtek Semiconductor Inc |
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HT814D0 Datasheet(HTML) 7 Page - Holtek Semiconductor Inc |
7 / 15 page 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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