HDK8450 (SM8450P) Processor User Guide Main board
80-28453-2 Rev. C Confidential – Qualcomm Technologies, Inc. and/or its affiliated companies – May Contain Trade Secrets 20
MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
60-pin B2B connector for
DSI1, touch, display
powers(OLED bias,
display, touch) to
supplement the display
support.
JTAG, MICs, sensor
powers are also included.
Supports DSI1 via the 60-
pin connector
▪ 4-Lane MIPI-CSI
DPHY1.2 or
▪ 3-Trio MIPI CSI
CPHY1.1
▪ I2C/SPI/GPIO
Power suppliers for OLED
and sensors
Support JTAG signals
Support MIC input
▪ 2 Analog MICs
▪ MIC bias supplier
The supplement to
support dual DSI
display panel with
power suppliers.
Also connect JTAG,
MICs to expansion
card
1x 40-pin B2B connector
for low speed signals
Compliant with 96boards
HS expansion spec
Supports
SPI/I3C/I2C/UART/I2S/ and
GPIOs via the 40-pin
connector
Support sensor
connectors and
Power/Volume
Buttons on the
Expansion Card
▪ Red: PMIC Driven
▪ Green: PMIC Driven
▪ Blue: PMIC Driven
▪ Green2: GPIO Control
1x WLAN LED (reserve)
1x BT LED (reserve)
▪ Orange: GPIO Control
▪ Blue: GPIO Control
The following sections provide in depth information on each expansion connectors on the Main
board. The information listed below is of particular use for those who want to interface other
external hardware devices with HDK8450. Before connecting anything to the development kit,
ensure the device meets the specific hardware requirements of the processor.
3.4.1 DC power jack
The HDK development kit is powered by a 12V DC adaptor through J3001. Starting from the
power jack, the 12V power supply branches off into different voltage rails via step down
converters. The system is powered by 3.9V via Silergy step down converter U5101.
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