How to estimate I/O and calculation power of a micro?

Started by December 6, 2004
```Hi!
I try to choose a micro fitting for my application.
I'm not sure how to estimate the power rating of the micro.
Basicly, I must handle 1 parallel printerport (with connected printer),
1 chipcard drive, 1 serial link to a GSM modem, a 4x4 keyboard matrix,
4x20 alphanumeric display (with its own display driving controller) and
In a worst case all actions (keyboard hit, entering chipcard, display
output, I/O...) can take place at a time. Further, there is the
processing of the I/O data. Let's assume the task times are known.
Now, how much MIPS do I actually need? Is there a kind of approximation
formula or something?

Best regards,
Andreas
```
```1. Estimate the approximate number of C code lines that will execute to
performing a transfer on the serial link.
2. Multiply this number by 4 to obtain the approximate number of
instructions.
3. Use the rate of the link to estimate the total instructions that
need to be executed per second. This
should give you a reasonable estimate.

Other operations on your processor do not seem to be computationaly
intensive.

Deepa
--
http://www.EventHelix.com/EventStudio
EventStudio 2.5 - Embedded System with Sequence Diagrams

```
```Andreas wrote:
> Hi!
> I try to choose a micro fitting for my application.
> I'm not sure how to estimate the power rating of the micro.
> Basicly, I must handle 1 parallel printerport (with connected printer),
> 1 chipcard drive, 1 serial link to a GSM modem, a 4x4 keyboard matrix,
> 4x20 alphanumeric display (with its own display driving controller) and
> 4 serial 38,4 kBit/s links.
> In a worst case all actions (keyboard hit, entering chipcard, display
> output, I/O...) can take place at a time. Further, there is the
> processing of the I/O data. Let's assume the task times are known.
> Now, how much MIPS do I actually need? Is there a kind of approximation
> formula or something?
>
> Best regards,
> Andreas