Atmel Smartcard IC

[Olipro]

I was wondering if it was a possibility to interface the PICAXE system with a TWI based interface on an Atmel smartcard IC chip, if not, are there any other PIC type chips out there which would be suitable for talking to the chip.

[andypro]

There are two options.

1) TWI is just atmels way of saying "I2C" or "SMB" without using those specific terms, otherwise theyd have to license them. If the chip acts as a slave (I havn't read the data sheet), you should be able to read and write with the I2C commands provided it doesn't need things like early stops or repeated starts.

2) Bit banging. You can itnerface jsut about anyhting out there using bit banging (save for a very few protocols such as one wire). With bit banging you ahve complete control over what's going on at any moment in the data chain, but it's alot slower than using the inbuilt commands.

--Andy P