diff --git a/data/registers/usart_v3.yaml b/data/registers/usart_v3.yaml
index 75bc24e..c3fc09d 100644
--- a/data/registers/usart_v3.yaml
+++ b/data/registers/usart_v3.yaml
@@ -328,7 +328,6 @@ fieldset/CR3:
       description: One sample bit method enable
       bit_offset: 11
       bit_size: 1
-      enum: ONEBIT
     - name: OVRDIS
       description: Overrun Disable
       bit_offset: 12
@@ -650,15 +649,6 @@ enum/MSBFIRST:
     - name: MSB
       description: "data is transmitted/received with MSB (bit 7/8/9) first, following the start bit"
       value: 1
-enum/ONEBIT:
-  bit_size: 1
-  variants:
-    - name: Sample3
-      description: Three sample bit method
-      value: 0
-    - name: Sample1
-      description: One sample bit method
-      value: 1
 enum/OVER8:
   bit_size: 1
   variants:
diff --git a/data/registers/usart_v4.yaml b/data/registers/usart_v4.yaml
index b7a1bac..0e2154d 100644
--- a/data/registers/usart_v4.yaml
+++ b/data/registers/usart_v4.yaml
@@ -348,7 +348,6 @@ fieldset/CR3:
       description: One sample bit method enable
       bit_offset: 11
       bit_size: 1
-      enum: ONEBIT
     - name: OVRDIS
       description: Overrun Disable
       bit_offset: 12
@@ -710,15 +709,6 @@ enum/MSBFIRST:
     - name: MSB
       description: "data is transmitted/received with MSB (bit 7/8/9) first, following the start bit"
       value: 1
-enum/ONEBIT:
-  bit_size: 1
-  variants:
-    - name: Sample3
-      description: Three sample bit method
-      value: 0
-    - name: Sample1
-      description: One sample bit method
-      value: 1
 enum/OVER8:
   bit_size: 1
   variants: