Reliable Custom Design Click here to contact AirBorn
--AirBorn Electronics-- US SITE · AUS SITE
Company Detail
Enquiry Form
Our Design method
Spec'ing your job
Hardware design
Firmware design
Examples: Circuits
Subject Overview     Next Subject     Exit Site
Example projects
Mechatronic controller
Programmable oscillator
RS485 firepanel int
IRDA Interface
Nursecall indicator
Serial to Parallel
Navy SMD Trainer
Danfoss tester
89C2051 project
Light Key Tone Gen
Index - Main Library
Design step-by-step
Circuit diagrams
PCB Layout
PCB Etching
Firmware design
Economies of scale
Test Procedures
ECOs - changes
Specification Intro.
Writing a Spec
Tech Ingredients
Example Specs
Engineer employment
R&D Economics
Design Inspiration
Autotrax PCB CAD
Autotrax resources
Autotrax utilities
Protel VESA drivers
Products - 1990s
Our PicoBus IO Std
RS232 RS485 FR4 Autotrax CAD Library P89LPC932 Program Header
Using a Multimeter
Complete site index
Offsite Links (15000+)
Google search
--AirBorn Electronics-- CONTACT or ENQUIRY
©2010 AirBorn

Serially programmed 8051 FLASH micro's

If you haven't come across them already, we'd like to introduce our favourite chips - FLASH 8051 microprocessors - now made by a range of different manufacturers - and specifically we'd like to tell you about the Philips P89LPC932, the Philips P89C51RD+ and Temic T89C51RD2.

Philips P89C51RD Microcontroller When it comes to the types of microprocessor to use in a project, there are as many best choices as there are design engineers. But some things just make good sense - and serially programmed flash microcontrollers are one of them. When the main program code can be downloaded to the target board through a serial port, the whole manufacturing process becomes a lot easier. When that code is also in flash memory, so that it can be updated without chip replacement when the inevitable new program version is required, field support is also a lot easier.

A lot of engineers have been making serially programmed FLASH program memory products for years - the difference here is that there is no requirement for a separate FLASH memory chip - the memory is within the microcontroller. Frequently there may be an external signal of some type required to prevent erroneous programming.

Flash microcontrollers still have one downside - they tend to use more power than one time programmable, EPROM or ROM memory microcontrollers. But that is becoming less and less of an issue, with, for example, the Philips P89LPC932 microcontroller now powering down to idle at a typical 3.25ma at 3.6V supply.

    The Philips P89LPC932:
  • 28 pin TSSOP - 25 useable I/O pins, all in a 9mm x 7mm PCB area!
  • Great Price (we can't quote - but about $2 US in 1000+ pcs)
  • 8kbytes FLASH, 512 bytes EEPROM, and 768 bytes RAM
  • On board +/- 2% accuracy oscillator - you can omit the Crystal
  • Runs 6x normal 8051 speed; Standard 7.37Mhz, Crystal to 12Mhz
  • On board Low Voltage Reset/Watchdog
  • Runs 2.4 - 3.6V - but actually 2.7 - 3.6V with brownout detect
  • 20ma output drive, schmitt inputs, comparator inputs, 5v tolerant I/O
  • UART, SPI, I2C, 2xDPTR, Capture/Compare, Versatile clocks.
We have no "axe to grind" here - we are not associated with Philips in any way, - other than as a customer. We do offer design services for clients wishing to use the P89LPC family of devices, in new designs - circuitry, firmware and prototyping. Please contact us for a quote if you need this type of design support.

This page had a Maintenance update: 21 April 2013

Was this page useful? If it was, why not try:
Circuits, Quick Index, Full Index, Links

Subject Overview Subject Continue