R-515JC
The R-515JC is a six-layer board with separate VCC and Ground planes intended for demanding industrial applications. Ideal for data logging or mixed mode communications. 

Hardware Overview 515sm.jpg (19953 bytes)
(Download User's Manual)
  • C515C processor
        Superset of the 8051 architecture with 8 data pointers
        64k byte on-chip ROM (external program execution is possible)
        256 byte on-chip RAM
        2K byte of on-chip XRAM
        Up to 64K byte external data memory
        Up to 10 MHz external operating frequency
        8 ports : 48+1 digital I / O lines, 8 analog inputs
        On-chip Full-CAN (Controller Area Network) controller system
        3 16-bit timer / counters
        10-bit A / D converter with multiplexed inputs and built-in self calibration
        Full duplex serial interface with programmable baudrate generator (USART)
        17 interrupt vectors, at 4 priority levels selectable
        Extended watchdog facilities
        4 Power saving modes
  • 32K of SRAM / optional 128K - 512K SRAM
  • 32K of monitor EPROM / optional 128K EPROM
  • Optional Y2K Real-Time Clock / Calendar (RTCC) (uses DS1685)
  • Optional battery back-up for RAM and Real-Time Clock / Calendar
  • 3 full-duplex serial ports on board
        CPU UART port with a RS-232 driver
        Optional Dual UART 88C92 for 2 additional serial ports
        Each of these ports may be used with either an RS-232 driver or an RS-422 / RS-485 driver
        2 Serial ports terminate at DB-9 connectors
        Optional header style connectors on board for all serial ports
  • SSC synchronous serial interface (SPI compatible)
  • 12 general purpose digital input / output bits on screw type terminal blocks
  • CAN (Controller Area Network) physical layer (80C250 or 80C251) built into the board
  • CAN port terminates on screw-type terminal blocks
  • Two-way reset feature gives access to all interrupt vectors
  • Demultiplexed processor Address and Data lines
  • All system signals are available on a 96-pin header
  • Power supplied to the board by way of a 2 position terminal block
  • Power on LED
  • Board operates on +5 volts
  • Operating temperature 0 to 70C, extended temp available
  • Machine screw sockets under all through-hole
  • 6 layer 4" x 5.5" board
  • Mounting holes in corners

The R-515JC has four serial ports, one is a dedicated RS-232 port, one a synchronous serial port, and two which can be configured for RS-232 or RS-422 / RS-485. The R-515JC also has CAN, (Controller Area Network) with the physical layer on-board.  It's low cost and flexibility also make it ideal as a training platform. 

The board comes standard with 32K RAM and 32K EPROM, but will accept up-to 512K RAM and 128K EPROM. There is a Y2K Real Time Clock / Calendar (RTCC) which may be populated as well as a battery back-up system for both the RAM and RTCC. The processor supports 10-bit A / D, as well as having 48 I / O lines, 3 16-bit timers and a watchdog timer. For more details on the processor and board, see the listings below.

Software Overview
Reads51 
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 review 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. 

Standard Package includes: The R-515JC Board with 1 serial port, 32K RAM, 32K EPROM, Reads51, User's Guides for board and software (download from the web), example programs, software tutorial, and circuit diagrams.

Loaded Package includes: The R-515JC Board with 3 serial ports with Dual UART, 128K RAM, 32K EPROM, Battery, and Real Time Clock Calendar, Reads51, User's Guides for board and software (download from the web), example programs, software tutorial, and circuit diagrams.

A well-regulated 5-volt (5% @500mA) power supply and a serial cable are to be provided by the user.
Schools, Students (with valid school ID), and US military personal receive a 10% discount on all products.

Features

Standard

Loaded

SABC515C Processor

yes

yes

SRAM

32K

128K

EPROM

32K

32K

CAN with physical layer

yes

yes

Serial Ports

1 RS-232 
1 SSC

1 RS-232, 1 SSC,
2 RS232 or RS422 or RS485

Real Time Clock Calendar

no

yes

Battery Back-up for RAM and RTCC

no

yes

Documentation:  WEB

yes

yes

Price  1-10

$115

$140

Price  11- $105 $130
R515JC LabPac $160 $185
 

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       Last updated 3/18/08