Make sure that the selected power supply between the V-USB and EXT VDD and the
board jumper configuration are combined, as shown in the image below.
| Header |
INPUT SUPPLY = VUSD |
INPUT SUPPLY = EXTVDD |
| J2 PIN 1-2 |
Short |
Open |
| J2 PIN 2-3 |
Open |
Short |
| J4 PIN 3-4 |
Short |
Open |
Power Supply Selection
| USB Powered Bridge and Target |
External Supply Powered Bridge and Target |
|
|
|
| When powering the MTB from a USB source, insert JS1 between J2 header
Pin1-2 and insert JS2 between J4 header Pin 3-4 |
When powering the MTB from an external source (with a supply voltage
of 1.8-5V), feed to J4 Pin:3 and supply GND to Pin:19. Do not place
jumper JS2. |
| |
USB Supply to Bridge and Target Board |
External Supply to Bridge and Target
Board |
USB Supply to Bridge and External Supply to Target
Board |
| Jumper J2 |
Short PIN 1-2 |
Short PIN 2-3 |
Short PIN 1-2 |
| Jumper J4 |
Short PIN 3-4 |
Open PIN 3-4 |
Open PIN 3-4 |
| EXTVDD |
- |
EXTVDD to J4 Pin 3 and GND Pin 19 |
EXTVDD to J4 Pin 3 and GND Pin 19 |
