An Introduction to USB Descriptors

This Technical Brief demonstrates the translation of a
game port game pad to a USB game pad using the
PIC16C765, Microchip's low-speed USB PICmicro
®
microcontroller (MCU). The purpose of this Technical
Brief is not only to show the translation of a game pad
to USB, but also to show how to successfully develop
a USB peripheral using the PIC16C765. An under-
standing of USB descriptors is the foundation for
successful USB peripheral development.
TB054
An Introduction to USB Descriptors
with a Game Port to USB Game Pad Translator Example
USB is a master-slave protocol. In other words, the
Author: Reston Condit host (i.e., PC) directs all communications to and from
Microchip Technology Inc. the peripherals. Peripherals do not send information to
the host unless the host requests the information. How
does a peripheral tell the host what type of device it is
INTRODUCTION