5: Carrier Board
Snapdragon 845 HDK Hardware Development Kit User Guide
22
Domain
Description
Specification
Usage
3-Digital Microphone via
audio input expansion
header
Audio expansion
Supported by WCD9340
Digital Audio header
For Digital audio input for
Digital MIC, I2S codec, Slim
bus interface.
3-Analog Microphone via
audio input expansion
header
Audio expansion
Supported by WCD9340
Analog Audio header
For Analog audio input for
Analog MIC (differential
signal)
2-Loud Speaker via audio
output expansion header
Audio expansion
Supported by WCD9340
Analog Audio header
For loud speaker output
after signal has been
processed
Earpiece via audio output
expansion header
Audio expansion
Supported by WCD9340
Analog Audio header
For earpiece output after
signal has been processed
PCIe1 for PCIe 1X Slot
(Reserve)
Gen3 1-lane interface.
General-purpose
peripherals, such as Gigabit
Ethernet, Gigabit Wi-Fi, or
PCIe based audio / video
processors
USB 2.0 Host
USB 2.0 Host
Type-A dual port header
For Mouse and Keyboard
USB 3.1
USB 3.1
Type-C header
Transfer data to and from
CPU
WLAN Antenna
2X PCB Antenna
2.4 – 5 GHz
Antenna to Processor board
Domain
Description
Specification
Usage
GNSS Antenna
PCB Antenna
GPS:
1574.42 MHz – 1576.42 MHz
GLONASS:
1587 MHz – 1606 MHz
COMPASS: 1559.05 to
1563.14MHz
Galileo: 4.092MHz BW
(centered on 1575.42MHz)
Antenna to Processor board
LED
3xLED
Red: PMIC Driven
Green: PMIC Driven
Blue: PMIC Driven
Red: General purpose
Green: General purpose
Blue: General purpose