Atmel AT89S Series ISP 8051 type
Microcontrollers
The 8051 equivalent with 256 bytes of internal
RAM, 3 Timers/Counters, UART, WDT, SPI interface, accepts external memories
(code/ram), 32 port pins, runs up to 24MHz (2MIPS), $3.86 at NetBuy, 8051
free compiler at the Internet, and the serial Flash programming using just
4 wires connected directly to the PC printer port... need no special
programmer... software available for free at
http://www.ustr.net ...
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AT89S53 12k bytes Flash -
Datasheet
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AT89S8252 8K bytes Flash & 2K bytes EEPROM -
Data Sheet
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AT89S4D12 4K bytes Flash & 128K bytes DataFlash (Only 5 IO lines)
- Data Sheet
Distributed by:
I have being using the AT89S8252 without any complain
or problems. The extra timer, the 256 bytes of internal RAM and the best
of all, the serialy programmable 8k flash code using only 4 pins of your
PC parallel port, allows you to download new code more than one thousand
times. As a rule, I leave those 4 wires (ground, Reset and 2 pin ports) available
at a RJ11 connector just for that purpose, so upgrades can be done at the
field by the customer.
Interested:
Questions: