Digilent PmodTMP2 Manuale di riferimento

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PmodTMP2™ Reference Manual
Revised May 24, 2016
This manual applies to the PmodTMP2 rev. B
Overview
The PmodTMP2 is an ambient temperature sensor powered by the
interface, users may appreciate a resolution of 0.0078°C through 16 bits of data.
The PmodTMP2.
1

Functional Description

The PmodTMP2 uses an 8-pin connector that allows for communication via I
2
the PmodTMP2 to other I
C devices. The PmodTMP2 also provides two 2-pin headers for selecting the I
of the chip, and two 2-pin headers for controlling external devices based upon temperature thresholds defined by
the user in software.
2
Interfacing with the Pmod
The PmodTMP2's onboard ADT7420 chip acts as a slave device using the industry standard I
scheme. To communicate with the PmodTMP2 device the I
0x4B) and a flag indicating whether the communication is a read (1) or a write (0). This is followed by the actual
data transfer. For the ADT7420, the data transfer should consist of the address of the desired device register
followed by the data to be written to the specified register. To read from a register the master must write the
desired register address to ADT7420, then send an I
DOC#: 502-221
Other product and company names mentioned may be trademarks of their respective owners.
Analog Devices
Features include:
16-bit ambient temperature sensor
Typical accuracy better that 0.25ºC
240 ms continuous conversion time
Programmable over and under-
temperature control pins
No calibration required
Small PCB size for flexible designs 1.0" ×
0.8" (2.5 cm × 2.0 cm)
2×4-pin connector with I2C interface
Follows
Specification
Library and example code available
in
2
C master device must specify a slave address (0x48-
2
C restart condition, and send a new read request to the
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®
ADT7420. Through the I
Digilent Pmod Interface
resource center
2
C, and provides pins to daisy-chain
2
C communication
509.334.6306
2
C
2
C address
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