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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9654 датащи(PDF) 34 Page - STMicroelectronics |
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L9654 датащи(HTML) 34 Page - STMicroelectronics |
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34 / 59 page  Functional description L9654 34/59 DocID14218 Rev 3 Bit D9 and bit D8 are used to set the period of pulse stretch timer. The device have 8 independent timers. Either a valid arming signal or a SPI deployment command is able to start the pulse stretch timer. These bits sets the timer duration. These values default to ‘00’ after a POR event. Table 17. Pulse stretch timer table Bit D9 Bit D8 Stretch period (ms) 0 0 7.5 0 1 15 1 0 30 1 1 60 Bit D7 through bit D0 are used for a soft reset sequence. The soft reset for the deployment driver is achieved by writing $AA and $55 within two subsequent 16-bit SPI transmissions. If the sequence is broken, the processor is required to re-transmit the sequence. L9654 does not reset if the sequence is not completed within two subsequent 16-bit SPI transmissions. This soft reset function is available only to deployment drivers. When soft reset command is received, the device resets its deployment driver’s internal logic and timer. The effects of soft reset to the deployment driver is the same as the one of POR event, except for MISO response. During a deployment, soft reset sequence is ignored. 4.11.3 Deployment driver command mode Command Mode message is defined as shown below. Table 18. MOSI command mode message definition Bit State Description D15 0 Mode bits D14 1 D13 Odd Parity D12 - Don’t Care D11 - Don’t Care D10 - Don’t Care D9 - Don’t Care D8 - Don’t Care D7 0 Channel 7 Idle (default) 1 Deploy Channel 7 D6 0 Channel 6 Idle (default) 1 Deploy Channel 6 |
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