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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MSM9802 датащи(PDF) 15 Page - OKI electronic componets |
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MSM9802 датащи(HTML) 15 Page - OKI electronic componets |
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15 / 52 page  15/51 MSM9802/03/05-xxx ¡ Semiconductor If playback is attempted at an unused address in the phrases, AOUT goes to 1/2 IAOUT and playback does not occur. Figure 3.2 shows the timing. Figure 3.2 Timing when Playback is Attempted at an Unused Phrase Address In the SW input interface, no phrase is triggered when SW2 to SW0 are all set to "0". Therefore, when the circuit consists of a diode matrices that use push-button switches, the maximum playback phrases are 56 phrases. A2-A0 (I) SW2-SW1 (I) "L" SW0 (I) BUSY (O) AOUT (O) Oscillation start 3.2 Random playback function The random playback function randomly generates 15 different addresses corresponding to the four bits of the addresses of A0 and SW2-SW0 (except ALL "L") on the IC, after which playback commences. Therefore, any input to A0 and SW2 to SW0 pins from external control is invalid. Hold these 4 pins either "H" or "L" level. SW2 to SW0 pins may be held open as they have internal pull-down resistor. Playback may not occur if all the 15 addresses have not been assigned a phrase. Care must be taken when creating ROM data. For example, when four phrases, "sunny", "rainy", "cloudy", and "snowy", are to be played randomly, set the phrases as shown in Table 3.1 in which a phrase is assigned to all the 15 addresses. The four phrases are then played back at random as shown below. 000 001 002 111 A2-A0 8 codes ¥ ¥ (000) 001 002 111 SW2-SW0 7 codes = 56 Phrases = 56 Code Prohibited |
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