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-rw-r--r--src/tusb_option.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tusb_option.h b/src/tusb_option.h
index 679b80420..6d733a429 100644
--- a/src/tusb_option.h
+++ b/src/tusb_option.h
@@ -267,7 +267,7 @@
#define CFG_TUD_DWC2_DMA_ENABLE CFG_TUD_DWC2_DMA_ENABLE_DEFAULT
#endif
-// Enable CI_HS VBUS Charge
+// Enable CI_HS VBUS Charge. Set this to 1 if the USB_VBUS pin is not connected to 5V VBUS (note: 3.3V is insufficient).
#ifndef CFG_TUD_CI_HS_VBUS_CHARGE
#ifndef CFG_TUD_CI_HS_VBUS_CHARGE_DEFAULT
#define CFG_TUD_CI_HS_VBUS_CHARGE_DEFAULT 0