1
2
5
6
3
4
x
VDD
GND
VSS
GND
U1
Figure 5-2. Pinout of Headers
Table 5-1. Connections by Header Pin Number
Header Pin Number
Connection
1
No connection
2
V
DD
3
GND
4
U1
5
GND
6
V
SS
For all headers J1 through J20, the connections are the same, but are rotated by a multiple of 90° according to
their position on the board. A legend is included for each rotation.
There is one 3-by-1 header located near the DUT (J21). Pin 2 of this header is connected to the thermal pad of
the DUT. Pin 1 of this header is connected to GND, and pin 3 of this header is connected to V
SS
.
Figure 5-3. Thermal Pad Selector
The connections of J21 are also labeled on the board's silkscreen layer next to the header.
Header Connections and Test Points
8
TMUXRTJ-RRQEVM User's Guide
SCDU027 – AUGUST 2021
Copyright © 2022 Texas Instruments Incorporated
