PWREN
Power Enable Register
| Module Instance | Base Address | Register Address |
|---|---|---|
| i_sdmmc_sdmmc_block_0 | 0xFF808000 | 0xFF808004 |
Size: 32
Offset: 0x4
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
|
Reserved |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|
Reserved |
POWER_ENABLE_0 RW 0x0 |
||||||||||||||
PWREN Fields
| Bit | Name | Description | Access | Reset | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | POWER_ENABLE_0 |
Power on/off switch for up to 16 cards; for example, bit[0] controls card 0.Once power is turned on, firmware should wait for regulator/switch ramp-up time before trying to initialize card.
0-power off
1-power on
Only NUM_CARDS number of bits are implemented.Bit values output to card_power_en port. Optional feature; ports can be used as general-purpose outputs.
|
RW | 0x0 |