diff --git a/.gitmodules b/.gitmodules
index 68f665a..d9b78c3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "uart"]
 	path = uart
 	url = git@git.blackmark.me:avr/uart.git
+[submodule "i2c"]
+	path = i2c
+	url = git@git.blackmark.me:avr/i2c.git
diff --git a/README.md b/README.md
index 256ad3f..7c9acbe 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ The PWM mode of the hardware timer can also be used. Additionally, if PWM is nee
     - [ ] Compile-time check for correct hardware configuration
     - [ ] Software backend driver
 - I2C
-    - [ ] Separation of interface and backend-driver
+    - [x] Separation of interface and backend-driver
     - [ ] Support all hardware provided configuration options
     - [ ] Compile-time check for correct hardware configuration
     - [ ] Software backend driver
diff --git a/i2c b/i2c
new file mode 160000
index 0000000..939cdc1
--- /dev/null
+++ b/i2c
@@ -0,0 +1 @@
+Subproject commit 939cdc1196edb161c6ea25eb61a72fa4488cba06