AK9750 Datasheet, PDF (25/49 Pages) Asahi Kasei Microsystems – IR Sensor IC with I2C I/F

[AK9750]
12.1.4. Slave Address
The Slave address of the AK9750 can be selected from the following list by setting the CAD0/1 pins.
When the CAD0/1 pins are connected to VSS, the Slave address bit is = “0”. When the CAD0/1 pins are
connected to VDD, the Slave address bit is “1”. Do not set up “CAD1 pin = CAD0 pin = 1” while the I²C
interface is used, because the “CAD1 pin = CAD0 pin = 1” state is only for Switch Mode.
Table 12.1. CAD0/1 pin setting and Slave Address
CAD1 pin CAD0 pin
Slave Address
0
0
64H
0
1
65H
1
0
66H
1
1
Switch Mode
When the first one byte data including the Slave address is transmitted after a Start condition, the
device, which is specified as the communicator by the Slave address on bus, selected.
After transmitting the Slave address, the device that has the corresponding device address will execute
a command after transmitting an Acknowledge signal. The 8-bit (Least Significant bit-LSB) of the first
one byte is the R/W bit.
When the R/W bit is set to “1”, a READ command is executed. When the R/W bit is set to “0”, a WRITE
command is executed.
MSB
1
LSB
1
0
0
1 CAD1 CAD0 R/W
Figure 12.4. Slave Address
015002896-E-01
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2015/10