G-NICO-018 Datasheet, PDF (5/11 Pages) List of Unclassifed Manufacturers – TSYS01 Digital Temperature Sensor

TSYS01 Digital Temperature Sensor
INTERFACE DESCRIPTION
PROTOCOL SELECTION
PS pin input level has to be defined in dependence to protocol selection.
• PS = 0 activates SPI.
• PS = 1 activates I²C.
I²C INTERFACE
A I²C communication message starts with a start condition and it is ended by a stop condition.
Each command consists of two bytes: the address byte and command byte.
I²C ADDRESS SELECTION
The I²C address can be selected by CSB pin.
• CSB=1 then the address is 1110110x.
• CSB=0 the address is 1110111x.
Therefore, two TSYS01 can be interfaced on the same I²C bus.
SPI INTERFACE
The serial interface is a 4-wire SPI bus, operating as a slave. CS (chip select), SCLK (serial clock), SDI
(serial data in), and SDO (serial data out) are used to interact with the SPI master.
Communication with the chip starts when CS is pulled to low and ends when CS is pulled to high.
SCLK is controlled by the SPI master and idles low (SCLK low on CS transitions, mode 0).
A mode where the clock alternatively idles high is also supported (mode 3).
COMMANDS
The commands are the same for SPI and I²C interface.
There are four commands:
• Reset
• Read PROM (calibration parameters)
• Start ADC Temperature conversion
• Read ADC Temperature result
Command
Reset
Start ADC Temperature Conversion
Read ADC Temperature Result
PROM Read Address 0
PROM Read Address 1
PROM Read Address 2
PROM Read Address 3
PROM Read Address 4
PROM Read Address 5
PROM Read Address 6
PROM Read Address 7
Hex Value
0x1E
0x48
0x00
0xA0
0xA2
0xA4
0xA6
0xA8
0xAA
0xAC
0xAE
TSYS01 Rev E0.3
www.meas-spec.com
5/10
2012-01-13