When the supported standard is not 5G NR the control data interface is 32 bits with the fields shown in the following table for LDPC encode.
| Field | Bits | Range | Description |
|---|---|---|---|
| id | 31:24 | 0 to 255 | External block identifier to be passed through to status output |
| 23:7 | - | Reserved | |
| code | 6:0 | 0 to 127 | Code number (CODE) used to specify which set of LDPC code parameters are to be used on the block |