diff --git a/docs/examples/layer-by-layer/Cargo.toml b/docs/examples/layer-by-layer/Cargo.toml
index f18c9e7e4..01666ec6e 100644
--- a/docs/examples/layer-by-layer/Cargo.toml
+++ b/docs/examples/layer-by-layer/Cargo.toml
@@ -3,7 +3,6 @@ resolver = "2"
 members = [
     "blinky-pac",
     "blinky-hal",
-    "blinky-irq",
     "blinky-async",
 ]
 
diff --git a/docs/examples/layer-by-layer/blinky-async/Cargo.toml b/docs/examples/layer-by-layer/blinky-async/Cargo.toml
index 51ddf87d4..541eb6edf 100644
--- a/docs/examples/layer-by-layer/blinky-async/Cargo.toml
+++ b/docs/examples/layer-by-layer/blinky-async/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2021"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-cortex-m = "0.7"
+cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
 cortex-m-rt = "0.7"
 embassy-stm32 = { version = "0.2.0", path = "../../../../embassy-stm32", features = ["stm32l475vg", "memory-x", "exti"]  }
 embassy-executor = { version = "0.7.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread"] }
diff --git a/docs/examples/layer-by-layer/blinky-hal/Cargo.toml b/docs/examples/layer-by-layer/blinky-hal/Cargo.toml
index 1e292e6b4..dd574c3e7 100644
--- a/docs/examples/layer-by-layer/blinky-hal/Cargo.toml
+++ b/docs/examples/layer-by-layer/blinky-hal/Cargo.toml
@@ -5,8 +5,8 @@ edition = "2021"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-cortex-m = "0.7"
 cortex-m-rt = "0.7"
+cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
 embassy-stm32 = { version = "0.2.0", path = "../../../../embassy-stm32", features = ["stm32l475vg", "memory-x"] }
 
 defmt = "0.3"
diff --git a/docs/examples/layer-by-layer/blinky-irq/Cargo.toml b/docs/examples/layer-by-layer/blinky-irq/Cargo.toml
index 04ffc23ba..8733ee894 100644
--- a/docs/examples/layer-by-layer/blinky-irq/Cargo.toml
+++ b/docs/examples/layer-by-layer/blinky-irq/Cargo.toml
@@ -1,3 +1,5 @@
+[workspace]
+
 [package]
 name = "blinky-irq"
 version = "0.1.0"
@@ -5,7 +7,7 @@ edition = "2021"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-cortex-m = "0.7"
+cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
 cortex-m-rt = { version = "0.7" }
 embassy-stm32 = { version = "0.2.0", path = "../../../../embassy-stm32", features = ["stm32l475vg", "memory-x", "unstable-pac"] }
 
diff --git a/docs/examples/layer-by-layer/blinky-pac/Cargo.toml b/docs/examples/layer-by-layer/blinky-pac/Cargo.toml
index cf2d7fede..155c41ec6 100644
--- a/docs/examples/layer-by-layer/blinky-pac/Cargo.toml
+++ b/docs/examples/layer-by-layer/blinky-pac/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2021"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-cortex-m = "0.7"
+cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
 cortex-m-rt = "0.7"
 stm32-metapac = { version = "16", features = ["stm32l475vg"] }
 
diff --git a/docs/examples/layer-by-layer/memory.x b/docs/examples/layer-by-layer/memory.x
new file mode 100644
index 000000000..69f5b28a1
--- /dev/null
+++ b/docs/examples/layer-by-layer/memory.x
@@ -0,0 +1,5 @@
+MEMORY
+{
+    FLASH : ORIGIN = 0x08000000, LENGTH = 2048K /* BANK_1 */
+    RAM   : ORIGIN = 0x20000000, LENGTH =  640K /* SRAM */
+}