Block Diagram

Power Section
UART2
(WP)
CF3 Smart
HSIC
SPI1
MASTER
SDIO
uSD
HOLDER
Iot con #0
I2C
HUB
I2C
4xGPIO
UART1
SDIO
MUX
GPIO
USB to
UART
FTDI
USB to
UART
converter
Wi-Fi/BT
chipset
HSIC
MAIN
USB 2.0
I2C1
GPS
Battery
Charger
PowerOn,
Reset,
Generic
button
PCM
Audio
MUX
Audio
Codec
uUSB-1
Battery
Input
PSU 1V8
PSU 3V3
PSU 5V0
jumper
Physical
switches
uUSB-2
Gyroscope /
Accelerometer
SX1509
GPIO
Expander
Battery
Gauge
SIM 1
SIM
HOLDER
UART_RTS_BT
UART_RX_BT
UART_TX_BT
UART_CTS_BT
BT
UART
DIV
SDIO
BUFFER
Pressure /
Temperature
Sensor
WiFi/BT
Various
signals
Multi-function
switch
Integrated
u.FL (DNI)
3.5mm
Jack
3.5mm
Jack
Default Hardware Configuration
UART0
(HL)
USB3503
HSIC UP
USB DW USB DWUSB DW
USB to SPI
SPI_MRDY
SPI_CLK
SPI_MISO
SPI_MOSI
ADC
GPIO GPIO GPIO
WL_HOST_WAKE
WL_REG_ON
BT_HOST_WAKE
Geomagnetic
Sensor
NFC
Buzzer RTC
Light Sensor
GPIO
GPIO
GPIO
BT_DEV_WAKE
2xGPIOs
Digital
microphone
ADC
Battery
Voltage Monitor
ADC
DNI
GPIO
Expansion
connector
SPI
GPIOs (2)
ADC
VIN_CONN
Expansion
connector
SPI
GPIOs (2)
ADC
VIN_CONN
DNI
HL78_MODE_ON
32.768KHz
26MHz
RX/TX
I2C
PORT1_I2C
PORT3_12C
PORT2_I2C
IOT_I2C