R-420SP is a powerful
programmer and chip carrier for the DS89C440/DS89C450 microcontroller in the 44-pin
PLCC package. It contains a clock
oscillator, a reset chip, and an RS-232 level converter.
These support chips allow the microcontroller to be programmed on-board
and run in the single-chip mode.
That is, the board will run code from internal ROM, using the on-chip
The R-420SP is
a small (1.2" x 2.25") two-layer board designed for embedded
is low cost and flexible, making it ideal as an embedded controller. The
R-420SP has 32 I/O lines and two serial
ports. The processor has 256 bytes of scratch pad memory, 1K SRAM, and
32K/64K Flash memory.
Our Reads51 software has been completely updated to
support this board.
build 448, now supports code generation for the single-chip mode and on-board
programming of the DS89C420 using the R-420SP board.
Download User's Manual
Download Assembly Manual
Download Data Sheet on DS89C420
(No chips included)