The R-535J accepts the 80C535 or 80C515 microcontrollers, which are enhanced 8032 processors in the 68-pin PLCC format. The 80C535 includes a Boolean processor, watchdog timer, A / D converter, and has 28 total I / O bits available. The system bus is available on two headers where the address and data lines of the processor are de-multiplexed. The system bus facilitates interfacing the R-535J to external memory-mapped input / output devices. This board is ideally suited for those wishing to use the 8031, but who need more I / O, or wish to use analog-to-digital conversion. Its small size and low cost make the R-535J perfect as a training board and for embedded control.

Hardware Overview 

  • Infineon 80C535 Microcontroller Boolean processor (at 12MHz)
  • 3 16-bit timers / counters which can also be used as interrupt sources
  • 16-bit watchdog timer
  • On board 8-bit analog to digital converter with 8 multiplexed inputs
  • Pulse width modulation capabilities
  • 32K of SRAM / optional 32K battery backed RAM
  • 32K of monitor EPROM / optional 32K EEPROM
  • 28 general purpose digital input / output bits on terminal blocks
  • 12 screw-type terminal blocks connected to general purpose digital input / output ports
  • All system signals are available on two 32-pin headers
  • Address and Data lines of the processor are de-multiplexed on two 23-pin headers
  • Two-way reset feature gives access to all interrupt vectors
  • Fully duplexed RS232 serial port with a MAX 232 driver
  • Serial port terminates at a DB9 connector
  • Power on LED
  • Board operates on +5 volts
  • Power supplied to the board by way of a 2 position terminal block
  • Power consumption is less than 75mA fully populated
  • Operating temperature 0 to 70C
  • Machine screw sockets under all ICs
  • Board size 3.75" by 5"
  • Circuit diagrams
  • Mounting holes in corners
  • May be used as an embedded controller

Download User's Manual

Download Assembly Manual

Software Overview
Reads51 is an integrated applications software development system, which runs on an IBM PC or compatible host. Reads51 allows writing, compiling, assembling, debugging, downloading, and running applications software in the MCS-51 language. Reads51 contains a C compiler, relative assembler, linker/locator, editor,  chip simulator, assembly language debugger, and host-to-board communications in a user-friendly, menu-driven environment.

Tutorial Source Code is provided to quickly get a new user familiar with our systems. 

Documentation for our products includes a guided tour of the software and hardware, sample programs, a description of the inner workings of the RROS including user-accessible system calls, and a full set of circuit diagrams. Documentation for kits also includes an assembly manual.

Standard Package includes: The R-535J, 32K EPROM, 32K RAM, Reads software, User's Guides for board and software (download from the web),  example programs, software tutorial, and circuit diagrams. An assembly manual is included with kits and bare boards.

A well-regulated 5-volt (5% @500mA) power supply and a serial cable are to be provided by the user.

We have very limited quantities of this board.  If interested please email techsupport@rigelcorp.com.




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       Last updated 3/18/08