diff --git a/README.md b/README.md
index ad704e0..16a252b 100644
--- a/README.md
+++ b/README.md
@@ -17,27 +17,66 @@ It has been tested on the nRF5340 Audio DK, but it should work with any nRF5340
 
 ## nRF5340 Development Kit
 
+The first  Virtual UART (UART1, ...) is Zephyr UART 1
+The second Virtual UART (UART2, ...) is Zephyr UART 0
+
+### Pinout
+
+Signal direction as seen from the nRF5340.
+
+| PIN      | Arduino | MCU   | Direction |
+|----------|---------|-------|-----------|
+|  TX      |    D0   | P1.00 |    out    |
+|  RX      |    D1   | P1.01 |    in     |
+| RTS      |    D7   | P1.11 |    out    |
+| CTS      |    D8   | P1.10 |    in     |
+| Time Sync|    D10  | P1.06 |    out    |
+
+
+
 ### HCI over USB CDC
 
 ```sh
 west build --pristine -b nrf5340dk/nrf5340/cpuapp -- -DEXTRA_DTC_OVERLAY_FILE=usb.overlay -DOVERLAY_CONFIG=overlay-usb.conf
 ```
 
-### HCI over UART 0 connected to Virtual UART in J-Link Probe
+
+### HCI over UART 0 connected to second Virtual UART in J-Link Probe 
 ```sh
 west build --pristine -b nrf5340dk/nrf5340/cpuapp
 ```
 
-### HCI over UART 1 connected to Virtual UART in J-Link Probe
+- HCI over second Virtual port / UART 0
+- Boot banner on Arduino Header UART (P1.01) / UART 1 
+
+
+### HCI over UART 1 connected to first Virtual UART in J-Link Probe as well as Arduino Headers
 ```sh
-west build --pristine -b nrf5340dk/nrf5340/cpuapp
+west build --pristine -b nrf5340dk/nrf5340/cpuapp -- -DEXTRA_DTC_OVERLAY_FILE=uart1.overlay
 ```
 
-_HCI over UART 1 and timesync not tested._
+- No Boot Banner on Arduino Header UART
+
 
 
 ## nRF5340 Audio DK
 
+The first UART (UART1, P1.04, P1.05) is only available via test points (TP60, TP61, ...)
+The second UART (UART2, P1.08, P1.09) is connected to the Arduino headers.
+
+### Pinout
+
+Signal direction as seen from the nRF5340.
+
+| PIN      | Arduino | MCU   | Direction |
+|----------|---------|-------|-----------|
+|  TX      |    D0   | P1.09 |    out    |
+|  RX      |    D1   | P1.08 |    in     |
+| RTS      |    D7   | P1.11 |    out    |
+| CTS      |    D8   | P1.10 |    in     |
+| Time Sync|    D10  | P1.01 |    out    |
+
+
 ### HCI over USB CDC
 
 ```sh
@@ -47,7 +86,7 @@ west build --pristine -b nrf5340_audio_dk/nrf5340/cpuapp -- -DEXTRA_DTC_OVERLAY_
 ### HCI over UART 0 connected to Virtual UART in J-Link Probe
 
 ```sh
-west build --pristine -b nrf5340_audio_dk_nrf5340_cpuapp
+west build --pristine -b nrf5340_audio_dk/nrf5340/cpuapp
 ```
 
 ### HCI over UART 1 connected to Virtual UART in J-Link Probe as well as Arduino Headers
@@ -64,22 +103,4 @@ west build --pristine -b nrf5340_audio_dk/nrf5340/cpuapp -- -DEXTRA_DTC_OVERLAY_
 
 To use UART 1 via Arduino headers, the virtual UART of the J-Link probe needs to be disabled, e.g. with the JLink Configuration Tool.
 
-### UART 1 Pinout
 
-Signal direction as seen from the nRF5340.
-
-| PIN      | Arduino | MCU   | Direction |
-|----------|---------|-------|-----------|
-|  TX      |    D0   | P1.09 |    out    |
-|  RX      |    D1   | P1.08 |    in     |
-| RTS      |    D7   | P1.11 |    out    |
-| CTS      |    D8   | P1.10 |    in     |
-
-### Time Sync Pinout
-
-For time sync, Arduino header D10 is used, which uses different MCU pins on the Audio vs. the regular DK.
-
-| Board            | Time sync MCU Pin |
-|------------------|-------------------|
-| nRF5340 Audio DK | P1.01             |
-| nRF5340 DK       | P1.06             |