Hardware Description
8
SWRU372C – June 2014 – Revised March 2020
Copyright © 2014–2020, Texas Instruments Incorporated
CC3200 SimpleLink™ Wi-Fi
®
and Internet of Things Solution With MCU
LaunchPad™ Hardware
2.4
Jumpers, Switches, and LEDs
2.4.1
JTAG Headers
The headers are provided on the board to isolate the CC3200 device from the mounted FTDI JTAG
emulator. These jumpers are shorted by default when the board is shipped from TI. To connect an
external emulator, remove these jumpers and place the external emulator on the pins closer to the
CC3200 device. When a battery is used, disconnect all the JTAG headers to prevent any reverse leakage
current.
Figure 4. JTAG Headers
(1)
For the SWD mode, only TCK and TMS must be shorted to the CC3200.
Table 1. JTAG Headers
Reference
Usage
Comments
J8 (TCK)
(1)
JTAG
Short: Routes the on-board emulator to the CC3200
J9 (TMS)
(1)
J10 (TDI)
Open: Isolate the on-board emulator from the CC3200.
J11(TDO)
2.4.2
I
2
C Connections
The board features an accelerometer and a temperature sensor for the out-of-box demo. These are
connected to the I
2
C bus and can be isolated using the jumpers provided. By removing J2 and J3, the
accelerometer and the temperature sensors are isolated from the I
2
C bus. This also removes any pullup
resistor from the I
2
C bus.
Figure 5. I
2
C Connections
