User's Guide

Table Of Contents

TI Confidential – NDA Restrictions

Hardware

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SWRU548A–February 2019–Revised August 2019

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CC3235MODSF LaunchPad™ Development Kit (LAUNCHCC3235MOD)

2.2.8 Reset Pullup Jumper

Table 3 lists the reset pullup jumper.

Table 3. Reset Pullup Jumper

Reference Use Comments

J13 RESET pullup Install this jumper to enable the pullup resistor on the nRESET pin of the

device, when the board is powered from an external supply.

2.2.9 Clocking

All of the required clocks are inside the module. There is no need to supply any external clock.

2.2.10 I

C Connection

The board features an accelerometer and a temperature sensor for the out-of-box demo. These are

connected to the I

C bus, and can be isolated using the jumpers provided (shown as yellow jumpers J23

and J24 in Figure 13).

Figure 13. I

C Connections

By removing J23 and J24, the accelerometer and the temperature sensors are isolated from the I

C bus.

This measure also removes the I

C pullup resistors from the sensor side of the circuit, and therefore any

connection to the circuit requires the user to install external pullup resistors.

Table 4 lists the I

C jumper definitions.

Table 4. I

C Jumper Definitions

Reference Use Comments

J23 I2C SCL Populated: CC3235MOD SCL connected to onboard sensors with pullup

Open: CC3235MOD SCL disconnected from onboard sensors

J24 I2C SDA Populated: CC3235MOD SDA connected to onboard sensors with pullup

Open: CC3235MOD SDA disconnected from onboard sensors