nRF 5340 DK High Idle Current

[jansens]

As the title states, my program (and a simple idle/hello world program for that matter) pull approximately 600-800 uA at idle. Same exact program, driver, and config on my nRF 52833 DK pulls about 8 uA at idle. I cannot figure out why this is. I suspect it has to do with the serial/UART interface and/or the network core? I noticed that even with "CONFIG_SERIAL=n" and "CONFIG_LOG=n" set in prj.conf I get output on UART/serial upon boot though it is from the bootloader. I did use the programmer tool to completely wipe the device (both network and app core) before I flashed it using West/Segger.

Output ("CONFIG_SERIAL=n" and "CONFIG_LOG=n")  : 

*** Booting Zephyr OS build v2.4.99-ncs2-2-g5049afda7b9f  ***
Flash regions		Domain		Permissions
00 01 0x00000 0x08000 	Secure		rwxl
02 63 0x08000 0x100000 	Non-Secure	rwxl

Non-secure callable region 0 placed in flash region 1 with size 32.

SRAM region		Domain		Permissions
00 03 0x00000 0x08000 	Secure		rwxl
04 63 0x08000 0x80000 	Non-Secure	rwxl

Peripheral		Domain		Status
00 NRF_P0               Non-Secure	OK
01 NRF_CLOCK            Non-Secure	OK
02 NRF_RTC0             Non-Secure	OK
03 NRF_RTC1             Non-Secure	OK
04 NRF_NFCT             Non-Secure	OK
05 NRF_NVMC             Non-Secure	OK
06 NRF_UARTE1           Non-Secure	OK
07 NRF_UARTE2           Secure		SKIP
08 NRF_TWIM2            Non-Secure	OK
09 NRF_SPIM3            Non-Secure	OK
10 NRF_TIMER0           Non-Secure	OK
11 NRF_TIMER1           Non-Secure	OK
12 NRF_TIMER2           Non-Secure	OK
13 NRF_SAADC            Non-Secure	OK
14 NRF_PWM0             Non-Secure	OK
15 NRF_PWM1             Non-Secure	OK
16 NRF_PWM2             Non-Secure	OK
17 NRF_PWM3             Non-Secure	OK
18 NRF_IPC              Non-Secure	OK
19 NRF_VMC              Non-Secure	OK
20 NRF_FPU              Non-Secure	OK
21 NRF_EGU1             Non-Secure	OK
22 NRF_EGU2             Non-Secure	OK
23 NRF_DPPIC            Non-Secure	OK
24 NRF_REGULATORS       Non-Secure	OK
25 NRF_DCNF             Secure		SKIP
26 NRF_CTRLAP           Secure		SKIP
27 NRF_SPIM4            Non-Secure	OK
28 NRF_WDT0             Non-Secure	OK
29 NRF_WDT1             Non-Secure	OK
30 NRF_COMP             Non-Secure	OK
31 NRF_LPCOMP           Non-Secure	OK
32 NRF_PDM0             Non-Secure	OK
33 NRF_I2S0             Non-Secure	OK
34 NRF_QSPI             Non-Secure	OK
35 NRF_NFCT             Non-Secure	OK
36 NRF_MUTEX            Non-Secure	OK
37 NRF_QDEC0            Non-Secure	OK
38 NRF_QDEC1            Non-Secure	OK
39 NRF_USBD             Non-Secure	OK
40 NRF_USBREGULATOR     Non-Secure	OK
41 NRF_P1               Non-Secure	OK
42 NRF_OSCILLATORS      Non-Secure	OK
43 NRF_RESET            Non-Secure	OK
44 NRF_GPIOTE1          Non-Secure	OK

SPM: NS image at 0x8000
SPM: NS MSP at 0x200094d0
SPM: NS reset vector at 0xb3dd
SPM: prepare to jump to Non-Secure image.

Output ("CONFIG_SERIAL=y" and "CONFIG_LOG=y" ) : 

*** Booting Zephyr OS build v2.4.99-ncs2-2-g5049afda7b9f  ***
Flash regions		Domain		Permissions
00 01 0x00000 0x08000 	Secure		rwxl
02 63 0x08000 0x100000 	Non-Secure	rwxl

Non-secure callable region 0 placed in flash region 1 with size 32.

SRAM region		Domain		Permissions
00 03 0x00000 0x08000 	Secure		rwxl
04 63 0x08000 0x80000 	Non-Secure	rwxl

Peripheral		Domain		Status
00 NRF_P0               Non-Secure	OK
01 NRF_CLOCK            Non-Secure	OK
02 NRF_RTC0             Non-Secure	OK
03 NRF_RTC1             Non-Secure	OK
04 NRF_NFCT             Non-Secure	OK
05 NRF_NVMC             Non-Secure	OK
06 NRF_UARTE1           Non-Secure	OK
07 NRF_UARTE2           Secure		SKIP
08 NRF_TWIM2            Non-Secure	OK
09 NRF_SPIM3            Non-Secure	OK
10 NRF_TIMER0           Non-Secure	OK
11 NRF_TIMER1           Non-Secure	OK
12 NRF_TIMER2           Non-Secure	OK
13 NRF_SAADC            Non-Secure	OK
14 NRF_PWM0             Non-Secure	OK
15 NRF_PWM1             Non-Secure	OK
16 NRF_PWM2             Non-Secure	OK
17 NRF_PWM3             Non-Secure	OK
18 NRF_IPC              Non-Secure	OK
19 NRF_VMC              Non-Secure	OK
20 NRF_FPU              Non-Secure	OK
21 NRF_EGU1             Non-Secure	OK
22 NRF_EGU2             Non-Secure	OK
23 NRF_DPPIC            Non-Secure	OK
24 NRF_REGULATORS       Non-Secure	OK
25 NRF_DCNF             Secure		SKIP
26 NRF_CTRLAP           Secure		SKIP
27 NRF_SPIM4            Non-Secure	OK
28 NRF_WDT0             Non-Secure	OK
29 NRF_WDT1             Non-Secure	OK
30 NRF_COMP             Non-Secure	OK
31 NRF_LPCOMP           Non-Secure	OK
32 NRF_PDM0             Non-Secure	OK
33 NRF_I2S0             Non-Secure	OK
34 NRF_QSPI             Non-Secure	OK
35 NRF_NFCT             Non-Secure	OK
36 NRF_MUTEX            Non-Secure	OK
37 NRF_QDEC0            Non-Secure	OK
38 NRF_QDEC1            Non-Secure	OK
39 NRF_USBD             Non-Secure	OK
40 NRF_USBREGULATOR     Non-Secure	OK
41 NRF_P1               Non-Secure	OK
42 NRF_OSCILLATORS      Non-Secure	OK
43 NRF_RESET            Non-Secure	OK
44 NRF_GPIOTE1          Non-Secure	OK

SPM: NS image at 0x8000
SPM: NS MSP at 0x200099a0
SPM: NS reset vector at 0xc1b1
SPM: prepare to jump to Non-Secure image.
*** Booting Zephyr OS build v2.4.99-ncs2-2-g5049afda7b9f  ***
main entry point!
accel_entry_point!
main entry point!
temp_entry_point!
Running on arm!
Temp Sensor 0x20008390 name HDC2022 is ready!
START OF temp_entry_point LOOP
START OF accel_entry_point LOOP
Waiting for a threshold event
trigger_handler fired!
1072693248.00 g: #
END OF accel_entry_point LOOP
START OF accel_entry_point LOOP
Waiting for a threshold event

Note I get about the same idle current draw whether SERIAL and LOG is set to yes or no.

Here is my project config and other relevant info:

I am building using nrf5340dk_nrf5340_cpuappns.
nrf5340dk_nrf5340_cpuappns.overlay : 

&i2c1 {
    compatible = "nordic,nrf-twim";
	status = "okay";
	sda-pin = < 30 >;
	scl-pin = < 31 >;
    clock-frequency = <I2C_BITRATE_STANDARD>;  
	
	adi_adxl372: adxl372@53 {
		compatible = "adi,adxl372";
		reg = <0x53>;
		label = "ADXL372";
		int1-gpios = <&gpio0 11 0>;
	};

	ti_hdc20x0: hdc20x0@41 {
		compatible = "ti,hdc20x0";
		reg = <0x41>;
		label = "HDC2022";
                drdy-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
	};
};

prj.conf : 

CONFIG_ASSERT=y 	# validation
CONFIG_STDOUT_CONSOLE=y

CONFIG_LOG=n
CONFIG_SERIAL=n

CONFIG_SENSOR_LOG_LEVEL_WRN=y

CONFIG_I2C=y
CONFIG_I2C_NRFX=y

CONFIG_SENSOR=y

CONFIG_GPIO=y

CONFIG_ADXL372=y
CONFIG_ADXL372_I2C=y

CONFIG_ADXL372_PEAK_DETECT_MODE=y

CONFIG_ADXL372_TRIGGER_GLOBAL_THREAD=y #THIS ENABLES ADXL372_TRIGGER (see Kconfig.txt for more!)
#CONFIG_ADXL372_TRIGGER_OWN_THREAD=y		#THIS ENABLES ADXL372_TRIGGER (see Kconfig.txt for more!)

CONFIG_HDC20X0=y

# Zephyr Device Power Management
CONFIG_DEVICE_POWER_MANAGEMENT=y
CONFIG_PM=y

CMakeLists.txt : 

cmake_minimum_required(VERSION 3.13.1)

set(TEST_DTC_OVERLAY_FILE
  ${CMAKE_CURRENT_SOURCE_DIR}/nrf5340dk_nrf5340_cpuappns.overlay
)

set(PRJ_CONF_FILE
  prj.conf
  ${CMAKE_CURRENT_LIST_DIR}/prj.conf
)

find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
project(hub_control)
zephyr_include_directories(include)

FILE(GLOB app_sources src/*.c)
target_sources(app PRIVATE ${app_sources})

Zephyr.dts : 

/dts-v1/;

/ {
	#address-cells = < 0x1 >;
	#size-cells = < 0x1 >;
	model = "Nordic NRF5340 DK NRF5340 Application";
	compatible = "nordic,nrf5340-dk-nrf5340-cpuapp";
	chosen {
		zephyr,flash-controller = &flash_controller;
		zephyr,entropy = &cryptocell_sw;
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,bt-mon-uart = &uart0;
		zephyr,bt-c2h-uart = &uart0;
		zephyr,ipc_shm = &sram0_shared;
		zephyr,sram = &sram0_ns;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_ns_partition;
	};
	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
		led3 = &led3;
		sw0 = &button0;
		sw1 = &button1;
		sw2 = &button2;
		sw3 = &button3;
	};
	soc {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		compatible = "nordic,nRF5340-CPUAPP-QKAA", "nordic,nRF5340-CPUAPP", "nordic,nRF53", "simple-bus";
		interrupt-parent = < &nvic >;
		ranges;
		nvic: interrupt-controller@e000e100 {
			compatible = "arm,v8m-nvic";
			reg = < 0xe000e100 0xc00 >;
			interrupt-controller;
			#interrupt-cells = < 0x2 >;
			arm,num-irq-priority-bits = < 0x3 >;
			phandle = < 0x1 >;
		};
		systick: timer@e000e010 {
			compatible = "arm,armv8m-systick";
			reg = < 0xe000e010 0x10 >;
			status = "disabled";
		};
		sram0: memory@20000000 {
			compatible = "mmio-sram";
			reg = < 0x20000000 0x80000 >;
		};
		sram1: memory@21000000 {
			compatible = "mmio-sram";
			reg = < 0x21000000 0x10000 >;
		};
		peripheral@40000000 {
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			ranges = < 0x0 0x40000000 0x10000000 >;
			flash_controller: flash-controller@39000 {
				compatible = "nordic,nrf53-flash-controller";
				reg = < 0x39000 0x1000 >;
				#address-cells = < 0x1 >;
				#size-cells = < 0x1 >;
				label = "NRF_FLASH_DRV_NAME";
				flash0: flash@0 {
					compatible = "soc-nv-flash";
					label = "NRF_FLASH";
					erase-block-size = < 0x1000 >;
					write-block-size = < 0x4 >;
					reg = < 0x0 0x100000 >;
					partitions {
						compatible = "fixed-partitions";
						#address-cells = < 0x1 >;
						#size-cells = < 0x1 >;
						boot_partition: partition@0 {
							label = "mcuboot";
							reg = < 0x0 0x10000 >;
						};
						slot0_partition: partition@10000 {
							label = "image-0";
							reg = < 0x10000 0x40000 >;
						};
						slot0_ns_partition: partition@50000 {
							label = "image-0-nonsecure";
							reg = < 0x50000 0x30000 >;
						};
						slot1_partition: partition@80000 {
							label = "image-1";
							reg = < 0x80000 0x40000 >;
						};
						slot1_ns_partition: partition@c0000 {
							label = "image-1-nonsecure";
							reg = < 0xc0000 0x30000 >;
						};
						scratch_partition: partition@f0000 {
							label = "image-scratch";
							reg = < 0xf0000 0xa000 >;
						};
						storage_partition: partition@fa000 {
							label = "storage";
							reg = < 0xfa000 0x6000 >;
						};
					};
				};
			};
			adc: adc@e000 {
				compatible = "nordic,nrf-saadc";
				reg = < 0xe000 0x1000 >;
				interrupts = < 0xe 0x1 >;
				status = "okay";
				label = "ADC_0";
				#io-channel-cells = < 0x1 >;
			};
			dppic: dppic@17000 {
				compatible = "nordic,nrf-dppic";
				reg = < 0x17000 0x1000 >;
				status = "okay";
				label = "DPPIC";
			};
			egu0: egu@1b000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1b000 0x1000 >;
				interrupts = < 0x1b 0x1 >;
				status = "okay";
			};
			egu1: egu@1c000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1c000 0x1000 >;
				interrupts = < 0x1c 0x1 >;
				status = "okay";
			};
			egu2: egu@1d000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1d000 0x1000 >;
				interrupts = < 0x1d 0x1 >;
				status = "okay";
			};
			egu3: egu@1e000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1e000 0x1000 >;
				interrupts = < 0x1e 0x1 >;
				status = "okay";
			};
			egu4: egu@1f000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1f000 0x1000 >;
				interrupts = < 0x1f 0x1 >;
				status = "okay";
			};
			egu5: egu@20000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x20000 0x1000 >;
				interrupts = < 0x20 0x1 >;
				status = "okay";
			};
			i2s0: i2s@28000 {
				compatible = "nordic,nrf-i2s";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x28000 0x1000 >;
				interrupts = < 0x28 0x1 >;
				status = "disabled";
				label = "I2S_0";
			};
			ipc: ipc@2a000 {
				compatible = "nordic,nrf-ipc";
				reg = < 0x2a000 0x1000 >;
				interrupts = < 0x2a 0x1 >;
				status = "okay";
				label = "IPC";
			};
			kmu: kmu@39000 {
				compatible = "nordic,nrf-kmu";
				reg = < 0x39000 0x1000 >;
				interrupts = < 0x39 0x1 >;
				status = "okay";
			};
			pdm0: pdm@26000 {
				compatible = "nordic,nrf-pdm";
				reg = < 0x26000 0x1000 >;
				interrupts = < 0x26 0x1 >;
				status = "disabled";
				label = "PDM_0";
			};
			regulators: regulator@4000 {
				compatible = "nordic,nrf-regulators";
				reg = < 0x4000 0x1000 >;
				status = "okay";
			};
			vmc: vmc@81000 {
				compatible = "nordic,nrf-vmc";
				reg = < 0x81000 0x1000 >;
				status = "okay";
			};
			uart0: uart@8000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0x8000 0x1000 >;
				interrupts = < 0x8 0x1 >;
				status = "okay";
				label = "UART_0";
				current-speed = < 0x1c200 >;
				tx-pin = < 0x14 >;
				rx-pin = < 0x16 >;
				rts-pin = < 0x13 >;
				cts-pin = < 0x15 >;
			};
			uart1: uart@9000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0x9000 0x1000 >;
				interrupts = < 0x9 0x1 >;
				status = "disabled";
				label = "UART_1";
			};
			uart2: uart@b000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "UART_2";
			};
			uart3: uart@c000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xc000 0x1000 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "UART_3";
			};
			i2c0: i2c@8000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x8000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x8 0x1 >;
				status = "disabled";
				label = "I2C_0";
			};
			i2c1: i2c@9000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x9 0x1 >;
				status = "okay";
				label = "I2C_1";
				compatible = "nordic,nrf-twim";
				sda-pin = < 0x1e >;
				scl-pin = < 0x1f >;
				adi_adxl372: adxl372@53 {
					compatible = "adi,adxl372";
					reg = < 0x53 >;
					label = "ADXL372";
					int1-gpios = < &gpio0 0xb 0x0 >;
				};
				ti_hdc20x0: hdc20x0@41 {
					compatible = "ti,hdc20x0";
					reg = < 0x41 >;
					label = "HDC2022";
					drdy-gpios = < &gpio0 0xc 0x1 >;
				};
			};
			i2c2: i2c@b000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xb000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "I2C_2";
			};
			i2c3: i2c@c000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xc000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "I2C_3";
			};
			spi0: spi@8000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x8000 0x1000 >;
				interrupts = < 0x8 0x1 >;
				status = "disabled";
				label = "SPI_0";
			};
			spi1: spi@9000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				interrupts = < 0x9 0x1 >;
				status = "disabled";
				label = "SPI_1";
			};
			spi2: spi@b000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "SPI_2";
			};
			spi3: spi@c000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xc000 0x1000 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "SPI_3";
			};
			spi4: spi@a000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xa000 0x1000 >;
				interrupts = < 0xa 0x1 >;
				status = "disabled";
				label = "SPI_4";
			};
			pwm0: pwm@21000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x21000 0x1000 >;
				interrupts = < 0x21 0x1 >;
				status = "okay";
				label = "PWM_0";
				#pwm-cells = < 0x1 >;
				ch0-pin = < 0x1c >;
			};
			pwm1: pwm@22000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x22000 0x1000 >;
				interrupts = < 0x22 0x1 >;
				status = "disabled";
				label = "PWM_1";
				#pwm-cells = < 0x1 >;
			};
			pwm2: pwm@23000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x23000 0x1000 >;
				interrupts = < 0x23 0x1 >;
				status = "disabled";
				label = "PWM_2";
				#pwm-cells = < 0x1 >;
			};
			pwm3: pwm@24000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x24000 0x1000 >;
				interrupts = < 0x24 0x1 >;
				status = "disabled";
				label = "PWM_3";
				#pwm-cells = < 0x1 >;
			};
			gpio0: gpio@842500 {
				compatible = "nordic,nrf-gpio";
				gpio-controller;
				reg = < 0x842500 0x300 >;
				#gpio-cells = < 0x2 >;
				label = "GPIO_0";
				status = "okay";
				port = < 0x0 >;
				phandle = < 0x2 >;
			};
			gpio1: gpio@842800 {
				compatible = "nordic,nrf-gpio";
				gpio-controller;
				reg = < 0x842800 0x300 >;
				#gpio-cells = < 0x2 >;
				ngpios = < 0x10 >;
				label = "GPIO_1";
				status = "okay";
				port = < 0x1 >;
			};
			qspi: qspi@2b000 {
				compatible = "nordic,nrf-qspi";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x2b000 0x1000 >;
				interrupts = < 0x2b 0x1 >;
				status = "okay";
				label = "QSPI";
				sck-pin = < 0x11 >;
				io-pins = < 0xd >, < 0xe >, < 0xf >, < 0x10 >;
				csn-pins = < 0x12 >;
				mx25r64: mx25r6435f@0 {
					compatible = "nordic,qspi-nor";
					reg = < 0x0 >;
					writeoc = "pp4io";
					readoc = "read4io";
					sck-frequency = < 0x7a1200 >;
					label = "MX25R64";
					jedec-id = [ C2 28 17 ];
					sfdp-bfp = [ E5 20 F1 FF FF FF FF 03 44 EB 08 6B 08 3B 04 BB EE FF FF FF FF FF 00 FF FF FF 00 FF 0C 20 0F 52 10 D8 00 FF 23 72 F5 00 82 ED 04 CC 44 83 68 44 30 B0 30 B0 F7 C4 D5 5C 00 BE 29 FF F0 D0 FF FF ];
					size = < 0x4000000 >;
					has-dpd;
					t-enter-dpd = < 0x2710 >;
					t-exit-dpd = < 0x88b8 >;
				};
			};
			rtc0: rtc@14000 {
				compatible = "nordic,nrf-rtc";
				reg = < 0x14000 0x1000 >;
				cc-num = < 0x4 >;
				interrupts = < 0x14 0x1 >;
				status = "okay";
				clock-frequency = < 0x8000 >;
				prescaler = < 0x1 >;
				label = "RTC_0";
			};
			rtc1: rtc@15000 {
				compatible = "nordic,nrf-rtc";
				reg = < 0x15000 0x1000 >;
				cc-num = < 0x4 >;
				interrupts = < 0x15 0x1 >;
				status = "okay";
				clock-frequency = < 0x8000 >;
				prescaler = < 0x1 >;
				label = "RTC_1";
			};
			clock: clock@5000 {
				compatible = "nordic,nrf-clock";
				reg = < 0x5000 0x1000 >;
				interrupts = < 0x5 0x1 >;
				status = "okay";
				label = "CLOCK";
			};
			power: power@5000 {
				compatible = "nordic,nrf-power";
				reg = < 0x5000 0x1000 >;
				interrupts = < 0x5 0x1 >;
				status = "okay";
			};
			wdt: wdt0: watchdog@18000 {
				compatible = "nordic,nrf-watchdog";
				reg = < 0x18000 0x1000 >;
				interrupts = < 0x18 0x1 >;
				status = "okay";
				label = "WDT";
			};
			wdt1: watchdog@19000 {
				compatible = "nordic,nrf-watchdog";
				reg = < 0x19000 0x1000 >;
				interrupts = < 0x19 0x1 >;
				status = "disabled";
				label = "WDT_1";
			};
			timer0: timer@f000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0xf000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0xf 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_0";
			};
			timer1: timer@10000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0x10000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0x10 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_1";
			};
			timer2: timer@11000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0x11000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0x11 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_2";
			};
			usbd: usbd@36000 {
				compatible = "nordic,nrf-usbd";
				reg = < 0x36000 0x1000 >;
				interrupts = < 0x36 0x1 >;
				num-bidir-endpoints = < 0x1 >;
				num-in-endpoints = < 0x7 >;
				num-out-endpoints = < 0x7 >;
				num-isoin-endpoints = < 0x1 >;
				num-isoout-endpoints = < 0x1 >;
				status = "okay";
				label = "USBD";
			};
		};
		gpiote: gpiote@4002f000 {
			compatible = "nordic,nrf-gpiote";
			reg = < 0x4002f000 0x1000 >;
			interrupts = < 0x2f 0x5 >;
			status = "okay";
			label = "GPIOTE_1";
		};
		cryptocell_sw: cryptocell-sw {
			compatible = "nordic,nrf-cc312-sw";
			#address-cells = < 0x0 >;
			label = "CRYPTOCELL_SW";
		};
	};
	cpus {
		#address-cells = < 0x1 >;
		#size-cells = < 0x0 >;
		cpu@0 {
			device_type = "cpu";
			compatible = "arm,cortex-m33f";
			reg = < 0x0 >;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			mpu: mpu@e000ed90 {
				compatible = "arm,armv8m-mpu";
				reg = < 0xe000ed90 0x40 >;
				arm,num-mpu-regions = < 0x8 >;
			};
		};
	};
	leds {
		compatible = "gpio-leds";
		led0: led_0 {
			gpios = < &gpio0 0x1c 0x1 >;
			label = "Green LED 0";
		};
		led1: led_1 {
			gpios = < &gpio0 0x1d 0x1 >;
			label = "Green LED 1";
		};
		led2: led_2 {
			gpios = < &gpio0 0x1e 0x1 >;
			label = "Green LED 2";
		};
		led3: led_3 {
			gpios = < &gpio0 0x1f 0x1 >;
			label = "Green LED 3";
		};
	};
	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			gpios = < &gpio0 0x17 0x11 >;
			label = "Push button 1";
		};
		button1: button_1 {
			gpios = < &gpio0 0x18 0x11 >;
			label = "Push button 2";
		};
		button2: button_2 {
			gpios = < &gpio0 0x8 0x11 >;
			label = "Push button 3";
		};
		button3: button_3 {
			gpios = < &gpio0 0x9 0x11 >;
			label = "Push button 4";
		};
	};
	reserved-memory {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		ranges;
		sram0_image: image@20000000 {
			reg = < 0x20000000 0x70000 >;
		};
		sram0_s: image_s@20000000 {
			reg = < 0x20000000 0x40000 >;
		};
		sram0_ns: image_ns@20040000 {
			reg = < 0x20040000 0x30000 >;
		};
		sram0_shared: memory@20070000 {
			reg = < 0x20070000 0x10000 >;
		};
	};
};

SDK and Build Versions:
nRF Connect SDK: v1.5.1
Zephyr OS: 2.4.99

[jansens]

Also, this is how I have my Power Profiler 2 wired/setup:

[Amanda Hsieh]

Hi Sam, 

Check out my colleague's answer in this post. 

Regards,

Amanda 

[jansens]

Hi Amanda,

I followed that solution and while it helped quite a bit it did not entirely fix the issue, see below:
So to get this solution to work I had to enable the following the prj.conf: 

CONFIG_LOG=y
CONFIG_SERIAL=y
CONFIG_STDOUT_CONSOLE=y

And then added the following code per your suggestion to my main program thread: 

const struct device *console, *uart1;

void main(void)
{
        // Turn off logging (which is using UART0):
        console = device_get_binding(DT_LABEL(DT_CHOSEN(zephyr_console)));
        if (console == NULL) {
		printf("Could not get %s device\n", DT_LABEL(DT_CHOSEN(zephyr_console)));
		return;
	}
        device_set_power_state(console, DEVICE_PM_OFF_STATE, NULL, NULL);
        
        // Turn off UART1:
        uart1 = device_get_binding(DT_LABEL(DT_NODELABEL(uart1)));
        if (uart1 == NULL) {
		printf("Could not get %s device\n", DT_LABEL(DT_NODELABEL(uart1)));
		return;
	}
        device_set_power_state(uart1, DEVICE_PM_OFF_STATE, NULL, NULL);
        
}

After doing this I get an idle current of about 67 uA which is still a lot higher than the 8uA what I was seeing on the nRF52833 and expected on the nRF5340:



Where else should I look to improve this? I have spent a ton of time digging through configs, documentation, etc. and am pretty stumped. Is there a good documentation pages I could dig into that maybe I missed?

I also did some more testing with the simple hello world program and was able to get it down to 5uA idle current only IF I built the program using "nrf5340dk_nrf5340_cpuapp" instead of "nrf5340dk_nrf5340_cpuappns".

[Amanda Hsieh]

Hi Sam,

Do you enable CONFIG_DEVICE_POWER_MANAGEMENT=y in prj.conf as the thread suggested?

Disabling logging and serial in both cores should get the best result. 

CONFIG_LOG=n

CONFIG_SERIAL=n

CONFIG_STDOUT_CONSOLE=n

-Amanda H.

[jansens]

Yes, in the initial prf.conf I posted I have
CONFIG_DEVICE_POWER_MANAGEMENT=y
CONFIG_PM=y

set.

Also if I set 

CONFIG_LOG=n
CONFIG_SERIAL=n
CONFIG_STDOUT_CONSOLE=n

and also try to run 

const struct device *console, *uart1;

void main(void)
{
        // Turn off logging (which is using UART0):
        console = device_get_binding(DT_LABEL(DT_CHOSEN(zephyr_console)));
        if (console == NULL) {
		printf("Could not get %s device\n", DT_LABEL(DT_CHOSEN(zephyr_console)));
		return;
	}
        device_set_power_state(console, DEVICE_PM_OFF_STATE, NULL, NULL);
        
        // Turn off UART1:
        uart1 = device_get_binding(DT_LABEL(DT_NODELABEL(uart1)));
        if (uart1 == NULL) {
		printf("Could not get %s device\n", DT_LABEL(DT_NODELABEL(uart1)));
		return;
	}
        device_set_power_state(uart1, DEVICE_PM_OFF_STATE, NULL, NULL);
        
}

then I get a fatal runtime error which causes a reset loop on the device.

Also you say to disable on BOTH CORES, how do I specify this in the config? Does the prj.conf only apply to the app core? Or both?