Re: Microcontroller with I2C and ISO7816 support?
- From: "Ulf Samuelsson" <ulf@xxxxxxxxxxxxx>
- Date: Fri, 29 Sep 2006 06:39:59 +0200
goister@xxxxxxxxx wrote:
Ulf Samuelsson wrote:
goister@xxxxxxxxx wrote:
Hi,
Are there any low cost microcontrollers(8051/AVR/etc) that support
both I2C and ISO7816 interface?
I assume master ISO7816 so: AT91SAM7S32(1)
It only supports I2C master though which could be a drawback!
I2C slave can rpbably quite easioly be emulated using the SSC.
You will find that a UART to ISO7816 is easier to find.
Atmel has several such circuits, and I am sure other companies have
as well. You could put an ATmega48 or similar in between.
--
Best Regards,
Ulf Samuelsson
ulf@xxxxxxxxxxxxx
This message is intended to be my own personal view and it
may or may not be shared by my employer Atmel Nordic AB
Well I will need I2C slave functionality so yeah that would be a
drawback. What do you mean by SSC?
The SSC is the Synchronous Serial Controller of the AT91.
You get access to the raw data and clock.
The CPU should have enough performance to do the I2C
slave in S/W when you
I also found some application notes for ISO7816 via UART, but it was
for ST. Where can I find such circuits for Atmel/etc?
ISO 7816 is directly supported in the AT91 USART.
There is code for an AVR RS-232 <-> ISO7816 bridge at
http://www.smartcache.net/download.html
It is C code for the AT902313 but I think
it would not be too hard to adopt for the ATmega48
which has the TWI = I2C as well.
Thanks!
--
Best Regards,
Ulf Samuelsson
ulf@xxxxxxxxxxxxx
This message is intended to be my own personal view and it
may or may not be shared by my employer Atmel Nordic AB
.
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