High Speed Expansion Connector - Huawei HiKey960 Hardware User Manual

HiKey960 Development Board Hardware User Manual
The 96Boards specification calls for 12 GPIO lines to be implemented on the Low Speed Expansion
Connector. Some of these GPIOs may support alternate functions for DSI/CSI controlThe HiKey960
Board implements this requirement. All GPIOs are routed to the Kirin960 SoC. Take LowSpeed
Expansion Connector for reference.
SPI 0
The 96Boards specification calls for one SPI bus master to be provided on the Low Speed Expansion
Connector.
The HiKey960 Development Board implements a full SPI master with 4 wires, CLK, CS, MOSI and
MISO. The signals are connected directly to the Kirin960 SoC and driven at 1.8V.
I2S
The 96Boards specification calls for one PCM/I2S bus to be provided on the Low Speed Expansion
Connector. The CLK, FS and DO signals are required while the DI is optional.
The HiKey960 Development Board implements a I2S interface with 4 wires, CLK, FS, DO and DI. The
signals are connected directly to the Kirin960 SoC and driven at 1.8V.
Power and Reset
The 96Boards specification calls for a signal on the Low Speed Expansion Connector that can power
on/off the board and a signal that serves as a board reset signal.
The HiKey960 Development Board routes the PWRBTNN (named PWRKEY on schematic) signal to
thePWRKEY pin of the PMIC. This signal is driven by s2201 as well, the on-board power on
push-buttonswitch. A mezzanine implementation of this signals should not drive it with any voltage, the
only allowedoperation is to force it to GND to start the board from a sleep mode.
The HiKey960 Development Board routes the RSTBTNN (named exp_rstoutn on schematic) signal to
the HRESETN pin of the PMIC Hi6421.
Power Supplies
The 96Boards specification calls for three power rails to be present on the Low Speed Expansion
Connector:
 +1.8V Max of 100mA
 +5V Provide a minimum of 5W of power (1A).
 SYS_DCIN 8-18V input with enough current to support all the board functions or the output
DCIN from on-board DC Connector able to provide a minimum of 7W of power.
The HiKey960 Development Board supports these requirements as follows:
 +1.8V Driven by PMIC up to 150mA.
 +5V Driven by a 5A DC-DC buck converter (U403). It also provides the VBUS power to
the twoUSB host connectors (J1702, J1801) and the HDMI 5V power to the HDMI connector
(J1901).Theremaining capacity provides a total of 7W which meets the 96Boards requirements.

High Speed Expansion Connector

There is a 60-pin High Speed Expansion Connector on board. As shown in the table below.
HiKey960 Signals 96Boards Signals PIN PIN HiKey960 Signals 96Boards Signals
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