TSYS02D Digital Temperature Sensor
TSYS02D Rev 3 www.meas-spec.com 2013-03
5/8
RESET SEQUENCE
The reset of TSYS02D can be sent at any time. When SDA line is blocked by an undefined state the
only way to get the TSYS02D to work is to send a power on reset or several SCL cycles. This is not
needed when the last command was not a conversion.
CONVERSION AND ADC READ
A conversion can be started by sending this command to TSYS02D. When the command is sent to the
sensor it stays busy until conversion is done. All other commands except the reset command will not be
executed during this time. When conversion is finished the data can be accessed by sending a Read
command. If an acknowledge appears from the TSYS02D, you may then send 24 SCLK cycles to get all
result bits. Every 9
th
bit the system waits for acknowledge. If the acknowledge is not sent the data
clocking out of the chip stops. Two types of conversion commands for temperature reading are possible.
If the “hold” command is issued, the SCL is held low during conversion, indicating when the conversion
is finished. If the “no hold” is issued, the SCL line is not controlled by the TSYS02D.
WITH HOLD
WITHOUT HOLD
