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NOA1312CUTAG Datasheet(PDF) 10 Page - ON Semiconductor

Part # NOA1312CUTAG
Description  High-Precision Ambient Light Sensor
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NOA1312CUTAG Datasheet(HTML) 10 Page - ON Semiconductor

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NOA1312
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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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