diff --git a/data/registers/hash_v1.yaml b/data/registers/hash_v1.yaml
index 1afddec..ef179b1 100644
--- a/data/registers/hash_v1.yaml
+++ b/data/registers/hash_v1.yaml
@@ -9,7 +9,6 @@ block/HASH:
     description: data input register.
     byte_offset: 4
     access: Write
-    fieldset: DIN
   - name: STR
     description: start register.
     byte_offset: 8
@@ -22,7 +21,6 @@ block/HASH:
       stride: 4
     byte_offset: 12
     access: Read
-    fieldset: HR
   - name: IMR
     description: interrupt enable register.
     byte_offset: 32
@@ -37,7 +35,6 @@ block/HASH:
       len: 51
       stride: 4
     byte_offset: 248
-    fieldset: CSR
 fieldset/CR:
   description: control register.
   fields:
@@ -73,27 +70,6 @@ fieldset/CR:
     description: Long key selection.
     bit_offset: 16
     bit_size: 1
-fieldset/CSR:
-  description: context swap registers.
-  fields:
-  - name: CSR
-    description: CSR0.
-    bit_offset: 0
-    bit_size: 32
-fieldset/DIN:
-  description: data input register.
-  fields:
-  - name: DATAIN
-    description: Data input.
-    bit_offset: 0
-    bit_size: 32
-fieldset/HR:
-  description: digest registers.
-  fields:
-  - name: H
-    description: H0.
-    bit_offset: 0
-    bit_size: 32
 fieldset/IMR:
   description: interrupt enable register.
   fields:
diff --git a/data/registers/hash_v2.yaml b/data/registers/hash_v2.yaml
index cc3e2a0..b80ef98 100644
--- a/data/registers/hash_v2.yaml
+++ b/data/registers/hash_v2.yaml
@@ -9,7 +9,6 @@ block/HASH:
     description: data input register.
     byte_offset: 4
     access: Write
-    fieldset: DIN
   - name: STR
     description: start register.
     byte_offset: 8
@@ -21,7 +20,6 @@ block/HASH:
       stride: 4
     byte_offset: 12
     access: Read
-    fieldset: HRA
   - name: IMR
     description: interrupt enable register.
     byte_offset: 32
@@ -36,7 +34,6 @@ block/HASH:
       len: 54
       stride: 4
     byte_offset: 248
-    fieldset: CSR
   - name: HR
     description: HASH digest register.
     array:
@@ -44,7 +41,6 @@ block/HASH:
       stride: 4
     byte_offset: 784
     access: Read
-    fieldset: HR
 fieldset/CR:
   description: control register.
   fields:
@@ -88,34 +84,6 @@ fieldset/CR:
     description: ALGO.
     bit_offset: 18
     bit_size: 1
-fieldset/CSR:
-  description: context swap registers.
-  fields:
-  - name: CSR
-    description: CSR0.
-    bit_offset: 0
-    bit_size: 32
-fieldset/DIN:
-  description: data input register.
-  fields:
-  - name: DATAIN
-    description: Data input.
-    bit_offset: 0
-    bit_size: 32
-fieldset/HR:
-  description: HASH digest register.
-  fields:
-  - name: H
-    description: H0.
-    bit_offset: 0
-    bit_size: 32
-fieldset/HRA:
-  description: digest registers.
-  fields:
-  - name: H
-    description: H0.
-    bit_offset: 0
-    bit_size: 32
 fieldset/IMR:
   description: interrupt enable register.
   fields:
diff --git a/data/registers/hash_v3.yaml b/data/registers/hash_v3.yaml
index d8a31f6..9d310d7 100644
--- a/data/registers/hash_v3.yaml
+++ b/data/registers/hash_v3.yaml
@@ -9,7 +9,6 @@ block/HASH:
     description: data input register.
     byte_offset: 4
     access: Write
-    fieldset: DIN
   - name: STR
     description: start register.
     byte_offset: 8
@@ -21,7 +20,6 @@ block/HASH:
       stride: 4
     byte_offset: 12
     access: Read
-    fieldset: HRA
   - name: IMR
     description: interrupt enable register.
     byte_offset: 32
@@ -36,7 +34,6 @@ block/HASH:
       len: 54
       stride: 4
     byte_offset: 248
-    fieldset: CSR
   - name: HR
     description: HASH digest register.
     array:
@@ -44,7 +41,6 @@ block/HASH:
       stride: 4
     byte_offset: 784
     access: Read
-    fieldset: HR
 fieldset/CR:
   description: control register.
   fields:
@@ -84,34 +80,6 @@ fieldset/CR:
     description: Algorithm selection.
     bit_offset: 17
     bit_size: 2
-fieldset/CSR:
-  description: context swap registers.
-  fields:
-  - name: CSR
-    description: CSR0.
-    bit_offset: 0
-    bit_size: 32
-fieldset/DIN:
-  description: data input register.
-  fields:
-  - name: DATAIN
-    description: Data input.
-    bit_offset: 0
-    bit_size: 32
-fieldset/HR:
-  description: HASH digest register.
-  fields:
-  - name: H
-    description: H0.
-    bit_offset: 0
-    bit_size: 32
-fieldset/HRA:
-  description: digest registers.
-  fields:
-  - name: H
-    description: H0.
-    bit_offset: 0
-    bit_size: 32
 fieldset/IMR:
   description: interrupt enable register.
   fields: