S-5851AAA-I6T1U Datasheet, PDF (13/29 Pages) Seiko Instruments Inc – 2-WIRE DIGITAL TEMPERATURE SENSOR

Rev. 2.1_00
2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
4. Configuration register
The configuration register is an 8-bit Read/Write register, and stores bit which controls operations of the S-5851A
Series. The Read/Write operation can be performed from MSB. All bits are 0 after power-up/reset of this configuration
register. In case of rewriting bit data except SD, OS bits, the bit data will be omitted.
OS
0
0
0
0
0
0
SD
MSB
LSB
Figure 14 Configuration Register
4. 1 Shutdown mode (SD)
Write 1 in the shutdown mode bit (SD) in the configuration register stops the circuits except the serial interface, thus
enables to reduce power consumption. By this mode, current comsumption will decrease to 1 μA (typ.) or less. This
mode is valid after the current conversion.
By Write 0 in the shutdown mode bit (SD), the S-5851A Series returns to the normal status in which the S-5851A
Series continues updating temperature data. Users can always read the latest temperature data.
4. 2 One-shot mode (OS)
The S-5851A Series features the one-shot temperature measure mode. In the shutdown mode, By Write 1 in the
one-shot mode bit (OS) in the configuration register, the S-5851A Series starts converting temperature that is done
only once. The S-5851A Series finishes updating data in the temperature register after this single temperature
conversion, the S-5851A Series returns to the shutdown mode again. When continuous temperature monitoring is
unnecessary, this mode reduces consumption power.
Write 1 in the one-shot mode bit (OS) in the normal status, the one-shot mode bit (OS) keeps 1 until the current
temperature data has finished updating. After this updating, the one-shot mode bit (OS) is set to 0 to indicate the
upload completion.
Seiko Instruments Inc.
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