2

AT83C21GC

4247AS–SCR–04/03

The connection with the host processor is achieved via a serial asynchronous link; the

rate can be selected from a range from 1200 to 115,200 bps.

The software inside the GemCore chip handles a communication protocol with the host

system called the Gemplus Block Protocol (GBP).

A complete set of documentation is available on the Gemplus web site:

http://www.gemplus.com.

A GBP Interface Library Kit can be provided, upon request. It consists of the source

code of the GBP communication layer between the host and GemCore. It is written in

the C language. See the Gemplus developers’ site at www.gemplus.com. Enquiries can

also be posted to cardreader@atmel.com.