Please Help : mpc555 in automotive control

Hi,
Need some info on how mpc 555 is used as a power train control module
and in engine management system. Freescale doesn't have any
information pertaining to it directly.
Any links or information would be appreciated.

Jan

In article <1143207032.010637.316430@t31g2000cwb.googlegroups.com>, 
acetracerbullet100@yahoo.co.uk says...
> Hi,
> Need some info on how mpc 555 is used as a power train control module
> and in engine management system. Freescale doesn't have any
> information pertaining to it directly.
> Any links or information would be appreciated.
> 
> Jan

The MPC555 has two Time Processor Units (TPUs).
These provide high-speed microcoded timing functions, several
of which are designed specifically for engine timing, while requiring
minimal service from the core microprocessor.
The TPUs can also run user-defined functions from the TPU RAM.

You might want to read up on the PMA and PMM functions from my web site 
here:

http://www.eslave.net/tpu/source/source.shtml

These are specifically designed for timing gear functions (detecting the
missing tooth, for example).

--Gene

Thanks for the info Gene.
Jan

On Fri, 24 Mar 2006 05:30:32 -0800, acetracerbullet100@yahoo.co.uk wrote:

> Hi,
> Need some info on how mpc 555 is used as a power train control module
> and in engine management system. 

The MPC555 is used in Engine Control Modules (ECMs) and Powertrain Control
Modules (PCMs).  The ECM controls only engine related functions, while the
PCM controls engine and transmission related functions.  Normally, the
on-chip RAM is sufficient for automotive use and there will be no external
RAM.  There will normally be at least 1 MB of external flash used to hold
program code, constants, and look-up table data.  Some dynamic data is
contained in the flash which will be updated just before the ECM/PCM
powers off--usually 6-8 seconds after the ignition is turned off.

There are two TPUs in the MPC555, each capable of running built-in
functions or from TPU RAM which can contain custom functions.  The TPUs
can process engine timing information and control spark and fuel delivery.  
The queued serial module provides SPI capability.  Most peripheral chips
required in ECMs/PCMs receive commands (if commandable) and transmit
status via SPI.  It's cheap.  The TouCAN module provides CAN
communications for the ECM/PCM to the vehicle LAN.



    ~Dave~