diff --git a/doc/MANUAL.md b/doc/MANUAL.md index 81a3ffb..977c87b 100644 --- a/doc/MANUAL.md +++ b/doc/MANUAL.md @@ -93,6 +93,9 @@ preventing 5V to FT231X power pin, but FT231X will still be weakly back-powered from its other pins connected with rest of the board and it will appear as some load. For most practical cases, we are lucky that FT231X appears as high-z when not directly powered. +However, unpowered FT231X pins loading may sometimes have prevent +JTAG from ESP32 or external JTAG, so for more reliable JTAG +we recommend to keep FT231X powered. Green LED D18 behaviour is the "Power LED". Green LED ON will keep board powered up. By factory default, when USB-serial chip @@ -100,7 +103,6 @@ is enumerated by PC, Green LED will turn ON. Normally when board is plugged into USB charger Green LED may shortly blink and stay OFF, but board will keep being powered. - Board PCB v1.7 must be hardware patched to be able to reliably enter shutdown mode. (It will keep waking up).