diff --git a/Flashing-SiLabs-based-M3-Newton-Displays.md b/Flashing-SiLabs-based-M3-Newton-Displays.md
index abf799d..46a48da 100644
--- a/Flashing-SiLabs-based-M3-Newton-Displays.md
+++ b/Flashing-SiLabs-based-M3-Newton-Displays.md
@@ -39,7 +39,7 @@ Of course wires can also be soldered directly to the test points, the pads are r
 Pinout connections for Silicon Labs debugger, see sections [2.3.2/2.3.3 in the user guide](https://www.silabs.com/documents/public/user-guides/ug548-brd1015a-user-guide.pdf):
 | Tag | Debugger |  Note |
 | - | - | - |
-|VCC  | VTARGET|
+|VCC  | VTARGET| make sure either the debugger (see section 4 in the user manual) or another power source is providing 3.3V to the tag |
 |GND | GND|
 |SWDIO | SWDIO|
 |SWDCLK | SWCLK|