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ML22804 Datasheet(PDF) 30 Page - List of Unclassifed Manufacturers |
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ML22804 Datasheet(HTML) 30 Page - List of Unclassifed Manufacturers |
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30 / 41 page  FEDL2280XFULL-04 ML22808/ML22804/Ml22802-XXX 5. PLAY command 0 1 0 0 ⎯ ⎯ ⎯ ⎯ • command F7 F6 F5 F4 F3 F2 F1 F0 1st byte 2nd byte The PLAY command is a 2-byte command. Set the playback phrase using the second byte of this command. The PLAY command can be input when the NCR signal is at a “H” level. Since it is possible to specify the playback phrase (F7 to F0) at the time of creating the ROM that stores voice data, set the phrase that was set when the ROM was created. Figure below shows the timing of phrase (F7 to F0 = 01H) playback. CS Status Playing SCK DI NCR BUSY AOUT 1V PLAY command 1 st byte PLAY command 2 nd byte Awaiting command Command is being processed Awaiting command Address is being controlled Awaiting command When the 1 st byte of the PLAY command is input, the device enters a state in which it waits for the 2nd byte to be input after the elapse of the command processing time. When the 2 nd byte of PLAY command is input, after an elapse of the command processing time, the device starts reading from the ROM the address information of the phrase to be played. Thereafter, playback operation starts, the playback is performed up to the specified ROM address, and then the playback ends automatically. The NCR1 signal is at a “L” level during address control, and goes “H” when the address control is finished and playback is started. When this NCR signal goes “H”, then it is possible to input the PLAY command for the next playback phrase. During address control, the BUSY signal is at a “L” level during playback and goes “H” when playback is finished. Whether the playback is going on can be known by the BUSY signal. Time Required for Address Control The time required for controlling the address of the playback phrase after input of the PLAY command is the time of 16 to 17 periods of the sampling frequency of the the phrase that was played last. After power is turned on or after RESET is input, it is the time of 16 to 17 periods of 4 kHz sampling frequency. 30/41 |
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