SI7013-A20 Datasheet, PDF (21/45 Pages) Silicon Laboratories – IC HUMIDITY AND TWO-ZONE TEMPERATURE SENSOR

Si7013-A20
5. I²C Interface
The Si7013 communicates with the host controller over a digital I²C interface. The 7-bit base slave address is 0x40
or 0x41; the least significant bit is pin programmable.
Table 13. I²C Slave Address Byte
A6
A5
A4
A3
A2
A1
A0
R/W
1
0
0
0
0
0
AD0
1/0
Master I²C devices communicate with the Si7013 using a command structure. The commands are listed in the I²C
command table. Commands other than those documented below are undefined and should not be sent to the
device.
Table 14. I²C Command Table
Command Description
Measure Relative Humidity, Hold Master Mode
Measure Relative Humidity, No Hold Master Mode
Measure Temperature, Hold Master Mode
Measure Temperature, No Hold Master Mode
Measure Analog Voltage or Thermistor Temperature
Read Temperature Value from Previous RH Measurement
Reset
Write Voltage Measurement Setup (User register 2)
Read Voltage Measurement Setup (User register 2)
Write RH/T Measurement Setup (User register 1)
Read RH/T Measurement Setup (User register 1)
Write Heater Setup (User register 3)
Read Heater Setup (User register 3)
Write Thermistor Correction Coefficient
Read Thermistor Correction Coefficient
Read Electronic ID 1st Word
Read Electronic ID 2nd Word
Read Firmware Revision
Command Code
0xE5
0xF5
0xE3
0xF3
0xEE
0xE0
0xFE
0x50
0x10
0xE6
0xE7
0x51
0x11
0xC5
0x84
0xFA 0x0F
0xFC 0xC9
0x84 0xB8
Rev. 1.1
21