AN2262

Application Note AN2262/D Rev. 1, 6/2002 Wireless HC08 Modem By Pavel Lajsner Motorola Czech System Application Laboratory Roznov pod Radhostem, Czech Republic Introduction This document details the hardware and software required for a low-cost wireless communication application based on: The Motorola 8-bit microcontroller (MCU), MC68HC908GP32 Accompanied by the Motorola RF (radio frequency) chip set: – MC33493 (transmitter)(1) – MC33591/3 (receiver) The main purpose of this document is to demonstrate the ability of the 8-bit MCU to be connected by means of a wireless medium. Or, in other words, how you can connect several HC08s forming a simple wireless network. The RF communication is analyzed first, then the configuration of the chips, the RF protocol, and finally the software techniques are discussed. All embedded software was written using the Hi-Ware ANSI-C/cC++ Compiler for HC08 from Metrowerks®(2) Software (http://www.metrowerks.com). Design Overview ‘The wireless HC08 modem’ is targeted as one possible communication medium for a complete ‘home interconnectivity’ system. 1. The MC33491 (code name Tango II) is no longer available. The MC33493 (code name Tango III) is it’s full replacement. For a more detailed description, refer to the footnote on page 4 and to the MC33491 to MC33493 Migration Notes on page 36. 2. Metrowerks is a registered trademark of Metrowerks, Inc., a wholly owned subsidiary of Motorola, Inc. © Motorola, Inc., 2002 AN2262/D The example ...