40.8.11 Power Control Register
| Name: | PCR |
| Offset: | 0x29 |
| Reset: | 0x0E |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| SDBVSEL[2:0] | SDBPWR | ||||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 1 | 1 | 1 | 0 | |||||
Bits 3:1 – SDBVSEL[2:0] SD Bus Voltage Select
By setting this bit, the user selects the voltage level for the card. Before setting this register, the user must check the Voltage Support in CA0R. If an unsupported voltage is selected, the system does not supply the bus voltage.
| Value | Name | Description |
|---|---|---|
| 0x0-0x4 | Reserved |
Reserved |
| 0x5 | 1V8 |
1.8 Volt (Typical) |
| 0x6 | 3V0 |
3.0 Volt (Typical) |
| 0x7 | 3V3 |
3.3 Volt (Typical) |
Bit 0 – SDBPWR SD Bus Power
This bit is automatically cleared by the peripheral if the card is removed. If this bit is cleared, the peripheral stops driving CMD and DAT[7:0] (tri-state) and drives CK to low level.