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8051
68HC11
68H908
68332
80C196
Specifications
89S8253 Processor 12 MHz or 24 MHz Operation 12K Flash, 2K EEPROM Small footprint: 1.65 by 2.5 inches RS-232 or RS-485 Serial Port 80C51 family compatible All MPU lines brought out on connectors In-system programmable Processor Supervisory Circuit with reset switch On-board voltage regulator Prototype area for custom circuitryThe TIGER BYTE-51 is a miniature single board computer based upon the popular 8051 family of microcontrollers. It uses the 89S8253 which supplies 12K bytes of Flash, and 2K bytes of EEPROM. This microcontroller is a fully static chip with clock speeds of up to 24 MHz.
89S8253 Microcontroller
Like other microcontrollers in its family, the 89S53 processor uses Flash for on-chip program storage. A major advantage, however, is its mechanism for in-system programming. An SPI synchronous serial port allows user software to be downloaded into the on-chip Flash. This approach is referred to as "in-system" since the 89S8253 remains installed on the TIGER BYTE-51 while programming occurs.
Flash Programming
Another advantage of the TIGER BYTE-51 is that in-system programming is available to program the processor's Flash. This is performed using Atmel's AT89ISP programming cable and free AT89ISP programming software. The cable connects to a 10 pin header on the TIGER BYTE-51.
Board Features
A major design feature of the TIGER BYTE-51 is its small foot print. The board measures only 1.65 by 2.5 inches. Other board features include RS-232 and RS-485 serial port buffering, a DS1233 EconoReset device, and prototyping area. The DS1233 generates a reset signal on power-up.
Connectors
Designing with the TIGER BYTE-51 is relatively straightforward because of the connection points available on the board. Two 20 pin headers are available for access to all CPU lines. These can be tied to user circuitry. If selected, the RS-232 buffered serial lines are brought out on a 3 position header connector. Alternately, the RS-485 lines, if enabled, are available at a 3 position header connector. As mentioned above, a 10 pin header is available for in-system programming. A cable connects this header header to a PC parallel printer port for programming operations. Finally, an on-board regulator allows the TIGER BYTE-51 to be used with an unregulated supply source of 9 VDC.
Summary
All in all, the TIGER BYTE-51 is a board which is small in size, yet big on performance.
| TIGER BYTE-51 w/89S8253, 12 or 24 MHz | $79 |
Last Updated on 1/5/2008
