S-5851AAA-I6T1U Datasheet, PDF (16/29 Pages) Seiko Instruments Inc – 2-WIRE DIGITAL TEMPERATURE SENSOR

2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
Rev. 2.1_00
5. Device addressing
To start the transmission, the master device on the system generates a start condition for the slave address. After that,
the master device transmits the 7-bit slave address and the 1-bit Read/Write instruction code to the SDA bus.
The higher 4 bits of the slave address are device code, and are fixed to “1001”.
The next 3 bits (A2, A1, A0) are used to select the devices on the system bus, and they are compared with the slave
address which is set beforehand by the address input pins (AD1, AD0). If the comparison result matches, the S-5851A
Series sends an acknowledgment signal back at the 9th clock of cycle. Table 11 shows the settings for the address
input pins (AD1, AD0) and the slave address.
The the S-5851A Series does not send an acknowledgment signal back unless the slave address matches.
Table 11 Settings for Address Input Pin and Slave Address
Settings for address input
pin
Slave address
AD1 pin
0
0
0
1
1
1
Open
Open
AD0 pin
0
Open
1
0
Open
1
0
1
Device
code
1001
A2 A1 A0
000
001
010
100
101
110
011
111
S-5851A
Series
1
MSB
Slave address
Device code
0
0
1
A2
A1
Figure 18 Slave Address
A0 R / W
LSB
16
Seiko Instruments Inc.