Nordic Semiconductor nRF5340 - Switches; Requirements for External Flash Memory DFU

Hardware description
LD1
L0603B
LD2
L0603G
LD3
L0603G
SW1
VOL-
SW2
VOL+
SW3
PLAY/PAUSE
SW4
BTN 4
SW5
BTN 5
R G B
LD4
LED RGB
R19
47R
R17
180R
R18
47R
BUTTON5
BUTTON4
BUTTON3
BUTTON2
BUTTON1
BUTTONS
BLUE
GREEN
RED
RGB LED
LED3
LED2
LED1
LEDS
UI
RGB1
RGB2
LEDS
BUTTONS
UI
Q3A
DMN26D0UDJ
Q4B
DMN26D0UDJ
Q6A
DMN26D0UDJ
R30
1M0
R33
1M0
R36
1M0
R G B
LD5
LED RGB
R22
47R
R20
180R
R21
47R
Q5A
DMN26D0UDJ
Q3B
DMN26D0UDJ
R31
1M0
R34
1M0
R38
1M0
BLUE
GREEN
RED
RGB LED
R25
390R
R27
220R
R26
330R
Q7A
DMN26D0UDJ
Q5B
DMN26D0UDJ
R35
1M0
R32
1M0
R37
1M0
LED_SUPPLY
LD6
L0603G
R16
220R
R29
1M0
HW_CODEC_LED
R G B
LD8
LED RGB
R28
220R
R23
1k2
R24
2k2
Q7B
DMN26D0UDJ
Q6B
DMN26D0UDJ
Q2
RV2C010UNT2L
TP58
TP59
TP11
TP12
TP9 TP10
Figure 12: LEDs and buttons
3.8.1 Switches
The nRF5340 Audio DK support switches.
Switch Function
POWER Turns the DK on or off.
DEBUG ENABLE Toggles power on or off for debug features. This switch is used for
accurate power and current measurements.
Table 2: nRF5340 Audio DK switches
3.9 Requirements for external flash memory DFU
To enable the external flash DFU, you need an additional flash memory shield.
The nRF5340 Audio DK application uses the MX25R6435F as the SPI NOR Flash. See the following table for
the pin definitions.
DK pin SPI NOR Flash pin Arduino pin
P0.08 SCK D13
P0.09 MOSI D11
P0.10 MISO D12
P1.10 CS D8
Table 3: Pin definitions
Note: If your current firmware is configured to do DFU using external flash, the flash shields must
be connected for the kits to boot, even if DFU mode is not initiated.
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