NodeMCU-BU01Specification V 1.0
C opyright © Shenzhen Ai-Thinker Technology Co.,Ltd All Rights Reserved 2020
10
universal I /O pin.
4
IO4
universal I /O pin.
5
IRQ
The interrupt request output from the DWM1000 to the
host processor and is connected to the MCU PB0. by
default, the IRQ is a high-level efficient output, but
can be configured as low-level valid if required. to
run correctly in SLEEP and DEEPSLEEP mode, it should
be configured to run efficiently at high levels. this
pin will float in hibernation and DEEPSLEEP states and
may cause a pseudo interrupt unless it is pulled low.
This pin can be reconfigured as a generic I /O line
GPIO8. when no IRQ function is used
6
CLK
SPI clock and connected to MCU PA5
7
MISO
SPI data output and connected to MCU PA6
8
MOSI
SPI data input and connected to MCU PA7
9
CSN
SPI chip select and connect with MCU PA4. this is a low
level effective enable input. SPICSn jumps from high
to low indicate the beginning of a new SPI transaction.
SPICSn can also be used as a wake-up signal to get DW1000
out of sleep or sleep state.
10
PA3
PA3 on the MCU
11
PB1
PB1 on the MCU
12
PB10
PB10 on the MCU
13
PB11
PB11 on the MCU
14
LED1
PA2, connection LED1 on the MCU
15
LED2
PA1, connection LED2 on the MCU
16
BTN
PA0, connection BTN keys on the MCU
17
RESET
Reset pin on MCU, connect reset button
18
GND
Ground
19
GND
Ground
20
V3.3
3.3 V Power supply
21
V5
5V power supply
