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DLH-L60G Datasheet(PDF) 5 Page - All Sensors Corporation |
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DLH-L60G Datasheet(HTML) 5 Page - All Sensors Corporation |
5 / 16 page All Sensors DS-0355 Rev A Operation Overview Page 5 Figure 2 - DLH Communication Model Digital Interface Command Formats When requesting the start of a measurement, the command format for both I2C and SPI is the same. When requesting sensor status over I2C, the host simply performs a 1-byte read transfer. When requesting sensor status over SPI, the host must send the Status Read command byte while reading 1 byte. When reading sensor data over I2C, the host simply performs a 7-byte read transfer. When reading sensor data over SPI, the host must send the 7-byte Data Read command while reading the data. See Table 1 below for Measurement Commands, Sensor Data read and Sensor Status read details. Table 1 - DLH Sensor Command Set Start-Single Command Internal State Interal Operation DSP DSP New Data Available EOC Start-Average2 / 4 / 8 / 16 Commands (Auto Averaging) Internal State Interal Operation DSP New Data Available EOC Idle Idle Active ADC (T, Z, P)… Idle Idle ADC (Temp, Zero, Pressure)n ADC (Temp, Zero, Pressure)1 Active Idle Idle Idle Idle ADC (Temp, Zero, Pressure) ADC (Temp, Zero, Pressure) Data Read Start-Average2/4/8/16 Active Command Start-Single Data Read Start-Single Command Start-Average2/4/8/16 Active Idle Idle 0xAA 0x00 0x00 0xAC 0x00 0x00 0xAD 0x00 0x00 0xAE 0x00 0x00 0xAF 0x00 0x00 I2C SPI I2C SPI Read of 1 byte from device. Read of 1 byte from device Host must send [0xF0] on MOSI Sensor Returns 1 byte on MISO Start‐Average8 Start‐Average16 Read Sensor Data Read of 7 bytes from device Read of 7 bytes from device Host must send [0xF0], then 6 bytes of [0x00] on MOSI Sensor Returns 7 bytes on MISO Read Sensor Status Start‐Average4 Measurement Commands (I2C or SPI) Description Command ( 3 bytes ) Start‐Single Start‐Average2 |
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