Test Point

Headers

TP1 to

TP4

10-Pin

SM-DIG Connector

I C Interface

2

TMP102

J1

4

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TMP102EVM Hardware Setup

2.1

Theory of Operation for TMP102 Hardware

The TMP102EVM only requires the two-wire I

constant 3.3 V and power return, as shown in Figure 3. The TMP102EVM also has test points to monitor

these signal lines and ground, in case users may want to use their own signals or verify successful I

communications.

Figure 3. TMP102EVM Board Block Diagram

2.2

Signal Definitions of H1 (10-Pin Male Connector Socket)

Table 3 shows the pinout for the 10-pin connector socket used to communicate between the TMP102EVM

and the SM-USB-DIG. It should be noted that the TMP102EVM uses only the necessary I

communication lines (pins 1 and 3) and the V

to the TMP102 sensors.

Table 3. Signal Definition of H1 on TMP102EVM Board

Pin on U1

Signal

Description

1

I2C_SCL

I

2

CTRL/MEAS4

GPIO: Control Output or Measure

Input

3

I2C_SDA1

I

4

CTRL/MEAS5

GPIO: Control Output or Measure

Input

5

SPI_DOUT1

SPI Data Output (MOSI)

6

V

DUT

Switchable DUT Power Supply: +3.3

V, +5 V, Hi-Z (Disconnected)

(1)

7

SPI_CLK

SPI Clock Signal (SCLK)

8

GND

Power Return (GND)

9

SPI_CS1

SPI Chip Select Signal (CS)

10

SPI_DIN1

SPI Data Input (MISO)

(1)

When V

5

SBOU114

– August 2011

TMP102EVM Evaluation Board and Software Tutorial

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