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NOA1312CUTAG Datasheet(PDF) 10 Page - ON Semiconductor |
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NOA1312CUTAG Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 16 page NOA1312 http://onsemi.com 10 NOA1312 I2C Slave Address The NOA1312 I2C address is selected by connecting the AD pin as shown in Table 6. Table 6. I2C SLAVE ADDRESS TABLE AD Pin I2C Slave Address VDD 0x29 NC (not connected) 0x39 VSS 0x49 The AD pin is not programmable. The connection to AD should be stable before applying power to the device. The device sets the I2C slave address when power is applied. For the case where the AD pin is not connected, adding a small 100 pF decoupling capacitor is recommended to provide a stable state. Should it be necessary, the address can be changed by following this procedure: 1. Disconnect power from the device 2. Change the AD connection to the desired level as shown in Table 6. 3. Reconnect power to the device. Once power is applied to this device, any change in the connection to the AD pin may cause unpredictable results. NOA1312 Data Registers NOA1312 operation is observed and controlled by internal data registers read from and written to via the external I2C interface. Registers are listed in Table 7. Default values are set on initial power up. Table 7. NOA1312 DATA REGISTERS Register Address Register Type Value (binary) Description EEPROM Address Default (binary) 0x00 POWER_CONTROL RW 0000 0000 Power Down 0x10 0000 0000 0001 0000 Power On 0x01 RESET RW 0011 0000 Reset ALS data to 0x0000 0x11 0000 0000 0x02 INTEGRATION_TIME RW 1001 0000 400 ms continuous measurement 0x12 1001 0001 1001 0001 200 ms continuous measurement 1010 0000 100 ms continuous measurement 1010 0001 50 ms continuous measurement 1011 0000 20 ms continuous measurement 1011 0001 2 ms continuous measurement 0x03 INT_SELECT RW 0000 0001 L → H 0x13 0000 0011 0000 0010 H → L 0000 0011 Inactive (H Keeper) 0x04 INT_THRESH_LSB RW XXXX XXXX Interrupt threshold, least significant bits 0x14 0000 0000 0x05 INT_THRESH_MSB RW XXXX XXXX Interrupt threshold, most significant bits 0x15 0000 1000 0x06 ALS_DATA_LSB R XXXX XXXX ALS measurement data, least significant bits − 0000 0000 0x07 ALS_DATA_MSB R XXXX XXXX ALS measurement data, most significant bits − 0000 0000 0x08 DEVICE_ID_LSB R XXXX XXXX Device ID value, least significant 0x18 0000 0000 0x09 DEVICE _ID_MSB R XXXX XXXX Device ID value, most significant bits 0x19 0000 0000 0x0A EEPROM_RDWR_ REG_ADDRESS RW XXXX XXXX Address of EEPROM register to be read or written to (see Table 8) − 0000 0000 0x0B EEPROM _CONTROL_ STATUS RW XXXX XXXX EEPROM read/write operation control (see Table 10) − 0000 0000 0x10 to 0x19 Memory Mapped EEPROM Registers EEPROM registers (see Table 8) |
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