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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DS620 датащи(PDF) 14 Page - Dallas Semiconductor |
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DS620 датащи(HTML) 14 Page - Dallas Semiconductor |
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14 / 15 page  DS620 Digital Thermometer and Thermostat 14 of 15 RX TX ACK DS620 generates acknowledge. 30 TX RX xxxxxxx1b Bus master writes to the configuration register putting the DS620 back in 1SHOT mode: 1SHOT = 1. 31 TX RX START Bus master generates a repeated start condition. 32 TX RX <address, 0> Bus master sends DS620 address, R/ W = 0. 33 RX TX ACK DS620 generates acknowledge. 34 TX RX 48h Master sends COPY DATA command to DS620 to copy data in from SRAM memory to EEPROM memory. 35 RX TX ACK DS620 generates acknowledge. 36 TX RX START Bus master generates a repeated start condition. 37 TX RX <address, 0> Bus master sends DS620 address, R/ W = 0. 38 RX TX ACK DS620 generates acknowledge. 39 TX RX 22h Bus master sends a STOP CONVERT command to stop the DS620 from continuously converting temperature. NOTE: Bus master should ensure that EEPROM copy operation is complete before executing the STOP CONVERT command by either waiting 10ms from the time of the COPY DATA command or checking the NVB bit in configuration register 40 RX TX ACK DS620 generates acknowledge. 41 TX RX STOP Bus master sends STOP condition to end communication with DS620. (The bus master could send a repeated start condition if additional communication with the DS620 is desired.) 42 WRITING THE 1SHOT BIT COMMAND SEQUENCE Configuring from continuous mode to 1SHOT mode. BUS MASTER MODE DS620 MODE DATA (MSB FIRST) COMMENTS SEQUENCE NUMBER TX RX START Bus master initiates a START condition. 1 TX RX <address, 0> Bus master sends DS620 address, R/ W = 0. 2 RX TX ACK DS620 generates acknowledge bit. 3 TX RX 51h Master sends START CONVERT command to DS620 to start temperature conversions. 4 RX TX ACK DS620 generates acknowledge bit and begins conversions. 5 TX RX START Bus master generates a repeated start condition. 6 TX RX <address, 0> Bus master sends DS620 address, R/ W = 0. 7 RX TX ACK DS620 generates acknowledge. 8 TX RX ACh Bus master sends the address location of the MSb of the configuration register (contains the 1SHOT bit). This writes to the SRAM location corresponding the EEPROM location. 9 RX TX ACK DS620 generates acknowledge. 10 TX RX xxxxxxx1b Bus master writes to the configuration register putting the DS620 in 1SHOT mode: 1SHOT = 1. 11 RX TX ACK DS620 generates acknowledge. 12 TX RX START Bus master generates a repeated start condition. 13 TX RX <address, 0> Bus master sends DS620 address, R/ W = 0. 14 RX TX ACK DS620 generates acknowledge. 15 TX RX 48h Master sends COPY DATA command to DS620 to copy data in from SRAM memory to EEPROM memory. 16 |
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