diff --git a/ports/stm8/README-COSMIC b/ports/stm8/README-COSMIC
index 94e2bc5..c77d813 100644
--- a/ports/stm8/README-COSMIC
+++ b/ports/stm8/README-COSMIC
@@ -237,8 +237,8 @@ To connect a serial cable to the Discovery you will need to connect to
 the following pins on the external connectors:
  Vcc: CN2 pin 8
  GND: CN2 pin 7
+ UART RX: CN4 pin 11 (connect to TX at the PC end)
  UART TX: CN4 pin 10 (connect to RX at the PC end)
- UART RX: CN4 pin 9 (connect to TX at the PC end)
 Note that the board uses TTL levels so you may need to use a level
 converter. External level converters may need to be powered using
 a Vdd of 5v, which can be achieved by positioning JP1 on the Discovery.
diff --git a/ports/stm8/README-IAR b/ports/stm8/README-IAR
index 9225e07..c535fb1 100644
--- a/ports/stm8/README-IAR
+++ b/ports/stm8/README-IAR
@@ -213,8 +213,8 @@ To connect a serial cable to the Discovery you will need to connect to
 the following pins on the external connectors:
  Vcc: CN2 pin 8
  GND: CN2 pin 7
+ UART RX: CN4 pin 11 (connect to TX at the PC end)
  UART TX: CN4 pin 10 (connect to RX at the PC end)
- UART RX: CN4 pin 9 (connect to TX at the PC end)
 Note that the board uses TTL levels so you may need to use a level
 converter. External level converters may need to be powered using
 a Vdd of 5v, which can be achieved by positioning JP1 on the Discovery.
diff --git a/ports/stm8/README-RAISONANCE b/ports/stm8/README-RAISONANCE
index c99b90c..5ae8226 100644
--- a/ports/stm8/README-RAISONANCE
+++ b/ports/stm8/README-RAISONANCE
@@ -229,8 +229,8 @@ To connect a serial cable to the Discovery you will need to connect to
 the following pins on the external connectors:
  Vcc: CN2 pin 8
  GND: CN2 pin 7
+ UART RX: CN4 pin 11 (connect to TX at the PC end)
  UART TX: CN4 pin 10 (connect to RX at the PC end)
- UART RX: CN4 pin 9 (connect to TX at the PC end)
 Note that the board uses TTL levels so you may need to use a level
 converter. External level converters may need to be powered using
 a Vdd of 5v, which can be achieved by positioning JP1 on the Discovery.