EVB-USB4X12
EVALUATION BOARD
USER’S GUIDE
2019 Microchip Technology Inc.
DS50002889A-page 15
Chapter 2. Getting Started
2.1
INTRODUCTION
The Microchip EVB-USB4x12 is designed for flexible configuration solutions. It can be
configured via default internal register settings, via a downloadable external firmware
to an onboard SPI Flash, or via SMBus.
Microchip provides a comprehensive software programming tool, MPLAB Connect
(MPLABC), for configuring USB4712/USB4912 functions, registers, and OTP memory.
USB4712/USB4912 requires MPLABC version 2.3.0 or greater.
For additional information on the MPLABC programming tool, refer to Software Librar
-
ies within the Microchip USB4712/USB4912 product page at www.micro
-
chip.com/USB4712 or www.microchip.com/USB4912
2.2
KIT CONTENTS
The EVB-USB4x12 Evaluation Kit includes on the EVB-USB4x12 PCB. This board may
be used with standard USB cabling. The kit also includes one USB Type-A to USB
Mini-B cable.
2.3
QUICK START
2.3.1
Power Source
A power supply is not included with EVB-USB4x12. This board may be powered
directly from VBUS of the USB host, VBUS from the host connected to downstream
port 1, or from an external 5V power supply, which may be connected to J2.
If powering the PCB from a USB host’s VBUS, ensure shunts are installed on J4
between pins [1-2] and [3-4].
If powering the PCB from an external 5V power supply, remove all shunts on J4.
2.3.2
Default Firmware
By default, the hub operates from internal ROM FW image plus the standard fac
-
tory-programmed OTP configuration contents. No firmware image is included inside of
the on-board SPI Flash device.
A firmware may be loaded by onto the onboard SPI Flash via USB by using the MPLAB
Connect SPI Flash programming feature. There is no need to program the SPI Flash
before operating the EVB. A special firmware image is only required for systems which
require custom functionality not included in the internal ROM options. D2 labeled “SPI
ACTIVE” should illuminate bright blue while the hub is executing the firmware from the
external SPI Flash.
Note:
If you wish to execute firmware from the internal ROM image after a firmware image
has been programmed to the on-board SPI Flash, install a shunt on J6 to disable
access to the SPI Flash device.
