Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodTMP3™ Reference Manual

Revised October 15, 2013

This manual applies to the PmodTMP3 rev. A

DOC#: 502-287

Other product and company names mentioned may be trademarks of their respective owners.

Page 1 of 3

Overview

The Digilent PmodTMP3 is a temperature sensor built around the Microchip TCN75AVUA.

1 Functional Description

The PmodTMP3 uses an 8-pin connector that allows for communication via I

C and provides pins to daisy-chain the

PmodTMP3 to other I

C devices. The PmodTMP3 also provides three 3-pin headers for selecting the I

C address of

the chip, and one 2-pin header for controlling external devices based upon temperature thresholds defined by the

user in software. Temperature data measured by the device is formatted in two’s compliment and may be

programmed for a resolution of 9-bits to 12-bits through the configuration register on the TCN75AVUA.

PmodTMP3

 Programmable 9-bit to 12-bit resolution

 Typical accuracy of ±1°C

 2-wire, I

C compatible interface with 8

selectable addresses

 30ms to 240ms typical conversion times

 2.7V to 5.5V operating voltage range

 Programmable temperature alert

Features include:

PAGE 1
300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodTMP3™ Reference Manual Revised October 15, 2013 This manual applies to the PmodTMP3 rev. A Overview The Digilent PmodTMP3 is a temperature sensor built around the Microchip TCN75AVUA. Features include:       Programmable 9-bit to 12-bit resolution Typical accuracy of ±1°C 2 2-wire, I C compatible interface with 8 selectable addresses 30ms to 240ms typical conversion times 2.7V to 5.
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PmodTMP3™ Reference Manual I2C Interface 2 2 The TCN75AVUA on the PmodTMP3 acts as a slave device using I C serial communication. To communicate with the PmodTMP3, the master device must specify a slave address (0x48-0x4F) 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 TCN75AVUA, the data transfer should consist of the address of the desired device register followed by the data to be written to the specified register.
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PmodTMP3™ Reference Manual JP3 JP2 JP1 Address GND GND GND 0x48 (0b1001000) GND GND 3V3 0x49 (0b1001001) GND 3V3 GND 0x4A (0b1001010) GND 3V3 3V3 0x4B (0b1001011) 3V3 GND GND 0x4C (0b1001100) 3V3 GND 3V3 0x4D (0b1001101) 3V3 3V3 GND 0x4E (0b1001110) 3V3 3V3 3V3 0x4F (0b1001111) Table 3. Addresses. 4 Open Drain Output The PmodTMP3 provides a single open-drain header for controlling external devices based on current temperature thresholds.