Appendix B. Updating The Usb Connectivity Firmware; Introduction; Updating The Pickit 2 Microcontroller Programmer - Microchip Technology Explorer 16 User Manual

Appendix B. Updating the USB Connectivity Firmware

B.1

INTRODUCTION

The USB subsystem of the Explorer 16 Development Board is preprogrammed with
USB bootloader firmware. This provides an easy method for upgrading the
PIC18LF4550 firmware to support ICSP, JTAG and SPI connectivity to PIC24 and
dsPIC33F devices.
This chapter describes how to upgrade the PIC18LF4550 device's firmware with the
PICkit 2 software. The same process can be used to upgrade the PIC18LF4550
device's firmware when updates and new firmware packages become available.
B.2

UPDATING THE PICkit 2 MICROCONTROLLER PROGRAMMER

Before beginning, it will be necessary to obtain and install the PICkit 2 programmer
software. Complete instructions for installing and using the programmer software
application is provided in the PICkit ™ 2 Microcontroller Programmer User's Guide
(DS51553). The programmer and user's guide, as well as the latest version of the
PICkit 2 operating system firmware, are available from the Microchip corporate
web site, www.microchip.com.
To update the USB firmware:
1. If not done already, download the latest PICkit 2 operating system software from
2. On the Explorer 16 board, install a jumper between pins 9 and 10 of the JTAG
3. Press and release MCLR (S1). This places the USB subsystem in Bootloader
4. Connect the Explorer 16 board to the PC via a standard USB cable.
5. Launch the PICkit 2 programmer software. From the menu bar, select
FIGURE B-1:
© 2005 Microchip Technology Inc.
EXPLORER 16 DEVELOPMENT
the Microchip web site.
connector (J13).
mode and makes it ready to accept new code.
Tools > Download PICKit 2 Operating System (Figure B-1).
DOWNLOAD PICkit™ 2 OPERATING SYSTEM
BOARD USER'S GUIDE
DS51589A-page 43