Power Mapping on Pin
Introduction
Voltages from power modules can be measured by extracting the voltages to MSIO_7. This function allows users to obtain the chip internal voltage by measuring the voltage from an external pin. In specific occasions, the internal voltage of the chip can be adjusted to a reasonable level.
Main Features
- Extracting DC-DC converter voltage to MSIO_7
- Extracting SYS_LDO voltage to MSIO_7
- Extracting CORE_LDO voltage to MSIO_7
- Extracting ANA_IO_LDO voltage to MSIO_7
- Extracting STB_IO_LDO voltage to MSIO_7
Programming
The voltages of power modules (such as DC-DC converter, SYS_LDO, CORE_LDO, ANA_IO_LDO and STB_IO_LDO) can be extracted to MSIO_7. The mapping can be achieved with software by:
-
Configuring the MPX_CFG register to enable the voltage extraction function: MPX_CFG = 0x80
-
Making sure that the MSIO_7 is in analog mode
-
Configuring the RF_REG_2.MUX1_REG1 register to select the modules for voltage extraction.
| Power Module | RF_REG_2.MUX1_REG1 |
|---|---|
|
DC-DC converter |
0xFD |
|
SYS_LDO |
0xED |
|
CORE_LDO |
0xF5 |
|
ANA_IO_LDO |
0xC5 |
|
STB_IO_LDO |
0xD0 |
