Maxim used to have a chip like the MAX232 but with internal capacitors (charge pump running at a higher frequency than the MAX232, of course). I can't remember the part number (I shut down the engineering part of my business a year ago), but the Maxim web site or a Maxim distributor should have it.
In response to Jim Rees: 1. The clock oscillator for the card needs to be in the dumb reader. 2. Yes, you can do all the control of card startup and closedown with modem control lines from an RS232 port, but I prefer to put some of the timing in the reader in order to guarantee that some of the 7816 timing is correct. Peter T Bristol UK ----- Original Message ----- From: "Harshal Baviskar" <[EMAIL PROTECTED]> To: "Smart Muscleheads" <[EMAIL PROTECTED]> Sent: Saturday, February 23, 2002 3:29 AM Subject: Re: MUSCLE Dumb Serial readers - Driver request > Hi. > > I am developing a smart smart card reader (with microcontroller in > it) which will communicate through rs232. Is there any solution for rs232 > communication that MAX232 chip so that I will not have to use the > capacitors. I've heard that ds175 is chip which will allow me to do > this. But did not get any documentation. pointers to data appreciated. > > tia > > Harshal > > On Fri, 22 Feb 2002, Jim Rees wrote: > > > The dumbmouse is needlessly complicated. All those discrete parts can be > > replace by a max232. An added benefit is that the device will then conform > > to rs232, which can be important in some applications. *************************************************************** Unix Smart Card Developers - M.U.S.C.L.E. (Movement for the Use of Smart Cards in a Linux Environment) http://www.linuxnet.com/ To unsubscribe send an email to [EMAIL PROTECTED] with unsubscribe sclinux ***************************************************************
