diff --git a/README.md b/README.md
index 16e3a3b..bfcb5e8 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,9 @@
 [User Documentation](https://github.com/rusefi/rusefi/wiki/uaEFI)
 
 powerted by [rusEFI](https://github.com/rusefi/rusefi)
+
+## MCU options
+
+1mg of flash is _required_.
+
+One day we shall try https://jlcpcb.com/partdetail/Stmicroelectronics-STM32F427VIT6%2FC57097#EC