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Microchip looses the plot ?

In article , Anton Erasmus writes

I haven't read the patent but...

CPU Smart cards have only one interface off the chip of 6/8 pins (memory cards and secure memory cards are similar)

1 i/o 2 Clock 3 Reset 4 Vcc 5 Ground

6 There was a Vpp for programming but this is no longer used and is not conected as cards us an internal charge pump

7/8 Aux1 and Aux2 for future use and are not currenty used.

So regardless of bus size there is only 1 IO line. This is an RS232 line running serial comms (bi-directional).

Now it depends on when Microchip did this patent. The smart card patents date from 1968 in Germany, 1970 in Japan but the majority were in 1974 in France. The real production was not until 1984 in France.

It is now an ISO Standard interface (ISO 7816). So Microchip will have to sue ISO (the international Standards Organisation) and every smart card manufacturer in the world (Hello Mastercard, Visa, AmEx etc :-)

I expect this will amuse ANSI who are part of ISO....

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\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
/\/\/ chris@phaedsys.org      www.phaedsys.org \/\/\
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Reply to
Chris Hills
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In the case of smart cards there is no external data bus. In fact there is no external bus at all.

Which bus? they have several data buses, as do PowerPC.

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\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
/\/\/ chris@phaedsys.org      www.phaedsys.org \/\/\
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Reply to
Chris Hills

RS-232?? Are you sure?

Serial bidirectional I can understand. RS-232, rather less so.

Steve

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Reply to
Steve at fivetrees

Jim Granville wrote: ....

....

There is an progress report on this case, in the news :

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Whilst Microchip were wasting resource on this, what they should have been watching is bigger players than Zilog :

This news from Freescale has the potential to damage Microchip much more than any 8 pin Z8F device....

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3mm packages, and sub 50c are promised.

This freescale move is one of the few times we have seen a uC family get simpler; mostly, the features creep the other way...

-jg

Reply to
Jim Granville

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Simpler is right! One accumulator, one 14-bit PC, two condition flags.

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Reply to
Mike Silva

C compiler support for the RS08 is in the next release of Byte Craft's C6808. Demo's ,C6808 updates and design reference material will be available on our website as soon as the technical details of the RS08 have been released.

Walter Banks, Byte Craft Limited

Mike Silva wrote:

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Reply to
Walter Banks

Walter,

Forgive my ignorance, but I am not sure how a C compiler can target a device with no SP (but they claim they have a 1 level subroutine call). How can you handle function params, and recursive functions. You apparently need to emulate the SP using other registers - this sounds inefficient?

Is Freescale on drugs?

Eric

Reply to
Eric

"Grimme acknowledged that Freescale's strategy is similar to one proposed by Atmel Corp. (San Jose, Calif.), which has developed compatible AVR microcontrollers across the 8- and 32 bit market."

Looks like they are trying to go the original ATtinyAVR approach which was abandoned by Atmel 3 years ago...

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Best Regards,
Ulf Samuelsson
This is intended to be my personal opinion which may,
or may bot be shared by my employer Atmel Nordic AB
Reply to
Ulf Samuelsson

The RS08 C compiler handles multiple levels of subroutine calls. Subroutine nesting beyond 1 level of subroutines are part of the design.

We have implemented several compilers without data stacks that support full parameter passing and recursive functions.

In non recursive functions parameter access is faster than parameters on a stack frame. In the C6808 we do recursion detection (including multi link recursion) and only create stack frames when recursion is needed. The RS08 C compiler supports recursive functions. Function setup for recursive functions is marginally more expensive than S08 stack frames and parameter access is similar.

I have ported and bunch HC08 and S08 C applications to the RS08 by just replacing part specific header files and code changes for part specific I/O devices.

Walter Banks, Byte Craft Limited

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Eric wrote:

Reply to
Walter Banks

That was not what I took from the Atmel press releases - has anyone seen a "Compatible Avr-32" ? The are certainly not binary compatible, and pin compatible was never hinted at..... ?

It will be interesting to watch.

If they _can_ do even a vanilla C, that will make a significant difference. At the very bottom end, these have a relatively large code space of 16K - I have not seen RAM figures yet.

Will these devices have on chip debug ?

-jg

Reply to
Jim Granville

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