14.8.16 VREG_CTRL
The VREG_CTRL register controls the use of the voltage regulators and indicates the status of these.
| Name: | VREG_CTRL |
| Offset: | 0x10 |
| Reset: | 0x00 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| AVREG_EXT | AVDD_OK | DVREG_EXT | DVDD_OK | ||||||
| Access | R/W | R | R | R | R/W | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bit 7 – AVREG_EXT AVREG_EXT
If set this register bit disables the internal analog voltage regulator to apply an external regulated 1.8V supply for the analog building blocks.
| Value | Description |
|---|---|
| 0x0 | Internal voltage regulator enabled, analog section |
| 0x1 | Internal voltage regulator disabled, use external regulated 1.8V supply voltage for the analog section |
Bit 6 – AVDD_OK AVDD_OK
This register bit indicates if the internal 1.8V regulated voltage supply AVDD has settled. The bit is set to logic high, if AVREG_EXT = 1.
| Value | Description |
|---|---|
| 0x0 | Analog voltage regulator is disabled or supply voltage not stable |
| 0x1 | Analog supply voltage is stable |
Bit 3 – DVREG_EXT DVREG_EXT
If set this register bit disables the internal digital voltage regulator to apply an external regulated 1.8V supply for the digital building blocks.
| Value | Description |
|---|---|
| 0x0 | Internal voltage regulator enabled, digital section |
| 0x1 | Internal voltage regulator disabled, use external regulated 1.8V supply voltage for the digital section |
Bit 2 – DVDD_OK DVDD_OK
This register bit indicates if the internal 1.8V regulated voltage supply DVDD has settled. The bit is set to logic high, if DVREG_EXT = 1.
| Value | Description |
|---|---|
| 0x0 | Digital voltage regulator is disabled or supply voltage not stable |
| 0x1 | Digital supply voltage is stable |
- While the reset value of this bit is zero, any practical access to the register is only possible when DVREG is active. So this bit is normally always read out as one.