Users Manual

6
Pin
sequence
Pin
definition
I/O 描
述
PIN1 GND
Power ground
PIN2 GPIO0 I/O
General-purpose digital I/O (see the GPIO
part of the register description in
Chapter 13 of the HW3000 Datasheet for
details)
PIN3 GPIO1 I/O
PIN4 GPIO2 I/O
PIN5 VCC
Power supply 3.3V, power supply voltage
range 2.0V~3.6V
PIN6 SDO O
SPI serial data output
PIN7 SDI I
SPI serial data input
PIN8 SCK I
SPI clock signal
PIN9 CSN I
SPI chip select signal (active low)
PIN10 IRQ
O
Interrupt output pin (polarity can be
configured, the default low level is
effective)
PIN11 PDN
I
POWER DOWN mode enable input pin
(active high), and module hardware
reset pin
Power ground
PIN12 GND
Power ground
PIN14 ANT
RF antenna output, connect to 50 ohm
433 antenna
PIN15 GND
Power ground
Note: （If the user MCU pin number is really tight, GPIO0, GPIO1, GPIO2 can not
be connected; if the number of pins allows, GPIO0, GPIO1, GPIO2 are recommended
to receive one of them, but SDO, SDI, SCK, CSN, IRQ , PDN must be connected.）