STMicroelectronics STM32L476 User Manual

UM1879 Rev 4 35/41
UM1879 Power consumption measurements
40
Appendix A Power consumption measurements
The power consumption measurements of the STM32L476 Discovery board are reflected in
Figure 20. Note the GPIO configuration of the STM32L476VGT6 in standby mode.
Figure 20. Power consumption tree
3V3_REG
JP6
Measured 287µA
3V3
287-115 => 172µA 172-92 => 80µA
Measured 115 µA
D6
3V
Measured 92µA
LDO
/'
SB28
For IDD
TSZ122
1st stage
V+ : ~11µA due to resistors bridge
V- : ~11µA due to resistors bridge
115-70 => 45µA
Measured 70µA
R30
Audio
03
QuadSPI
14
L3GD20
DAC&6
LSM303
CTR
3V_MFX
70-0.4 => 69.6µA
Measured 0.4µA
JP5
VDD_MCU
MFX
STM32L152
For IDD
TSZ122
2nd stage
V+ : ~10µA due to resistors bridge
STM32L476VGT6
STM32L476VGT6 GPIOs are configured in ‘Analog input’ except:
PWR->PUCRA = 0; // no PU on GPIOA
PWR->PDCRA = 0x2F; // PD on GPIOA[0,1,2,3,5]
PWR->PUCRB = 0; // no PU on GPIOB
PWR->PDCRB = 0; // no PD on GPIOB
PWR->PUCRC = 0x1; // PU on GPIOC[0] MAG_CS
PWR->PDCRC = 0x800; // PD on GPIOC[11]
PWR->PUCRD = 0x80; // PU on GPIOD[7] MEMS_SPI_CS
PWR->PDCRD = 0x12; // no PD on GPIOD[1,4] MEMS_SPI_CLK, MEMS_SPI_MOSI
PWR->PUCRE = 0x0001; // PU on GPIOE[0] XL_CS
PWR->PDCRE = 0x0200; // PD on GPIOE[9] AUDIO_CLK for DMIC
PWR->PDCRE|= 0x0074; // PD on GPIOE[2,4,5,6] SAI1 interface to CODEC
PWR->PDCRE|= 0xF400; // PD on GPIOE[10,12,13,14,15] QuadSPI CLK, D0,D1,D2,D3
PWR->PUCRF = 0; // no PU on GPIOF
PWR->PDCRF = 0; // no PD on GPIOF
PWR->PUCRG = 0; // no PU on GPIOG
PWR->PDCRG = 0; // no PD on GPIOG
PWR->PUCRH = 0; // no PU on GPIOH
PWR->PDCRH = 0; // no PD on GPIOH

STMicroelectronics STM32L476 Specifications

General

Brand	STMicroelectronics
Model	STM32L476
Category	Motherboard
Language	English