40.8.40 SDHC Capabilities Control Register
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | CACR |
| Offset: | 0x230 |
| Reset: | 0x00000000 |
| Property: | - |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| KEY[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| CAPWREN | |||||||||
| Access | R/W | ||||||||
| Reset | 0 |
Bits 15:8 – KEY[7:0] Key
| Value | Name | Description |
|---|---|---|
| 46h | KEY |
Writing any other value in this field aborts the write operation of the CAPWREN bit. Always reads as 0. |
Bit 0 – CAPWREN Capabilities Write Enable
This bit can only be written if KEY correspond to 46h.
| Value | Description |
|---|---|
| 0 |
Capabilities registers (SDHC_CA0R and SDHC_CA1R) cannot be written. |
| 1 |
Capabilities registers (SDHC_CA0R and SDHC_CA1R) can be written. |