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Hi; I am considering HC11 for a design which might require two or more serial interface, two of these serial would be standard RS232 to PC. I understand that there is an SCI port which may easily be connected to a standard PC. I am however, not sure about SPI. I am wondering 1) If I can use SPI to communicate using RS232 standards (like SCI)? 2) Is there any version of HC11 with more than two serial ports?

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See Below. Emmett Redd Ph.D. mailto: Associate Professor (417)836-5221 Department of Physics, Astronomy, and Materials Science Southwest Missouri State University Fax (417)836-6226 901 SOUTH NATIONAL Dept (417)836-5131 SPRINGFIELD, MO 65804 USA > -----Original Message----- > From: aporaria [mailto:] > Sent: Monday, March 15, 2004 10:41 AM > To: > Subject: [m68HC11] HC11 with two (or more) serial ports > > Hi; > I am considering HC11 for a design which might require two or more > serial interface, two of these serial would be standard RS232 to PC. > I understand that there is an SCI port which may easily be connected > to a standard PC. I am however, not sure about SPI. > I am wondering > > 1) If I can use SPI to communicate using RS232 standards (like SCI)? > > 2) Is there any version of HC11 with more than two serial ports? The Motorola Evaluation Board 68HC11EVB has two serial ports: the SCI and a DUART. >

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MC68HC11P1 and MC68HC11P2 have 3 SCIs http://e-www.motorola.com/webapp/sps/site/prod_summary.jsp?code=68HC11P1&nod eId=01624684498635 You can also create a software SCI (using OC/IC interrupts) that will be behave just as good as the hardware one. ----- Original Message ----- From: "aporaria" <> To: < > Hi; > I am considering HC11 for a design which might require two or more > serial interface, two of these serial would be standard RS232 to PC. > I understand that there is an SCI port which may easily be connected > to a standard PC. I am however, not sure about SPI. > I am wondering > > 1) If I can use SPI to communicate using RS232 standards (like SCI)? > > 2) Is there any version of HC11 with more than two serial ports?

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Warning- The 68HC11 P series parts are in "stage 4," "product maturity and saturation," according to the Motorola website. They aren't yet in stage 5, where new designs aren't recommended, so will be around for quite some time. But if this is a new design, and you want to be able to make the same design for a number of years, you might want to check out other alternatives... Best regards, Kerry Berland Silicon Engines 2101 Oxford Road 847-803-6860 Fax 847-803-6870 Des Plaines, IL 60018 USA -----Original Message----- From: Tony Papadimitriou [mailto:] Sent: Monday, March 15, 2004 12:21 PM To: Subject: Re: [m68HC11] HC11 with two (or more) serial ports MC68HC11P1 and MC68HC11P2 have 3 SCIs http://e-www.motorola.com/webapp/sps/site/prod_summary.jsp?code=68HC11P1 <http://e-www.motorola.com/webapp/sps/site/prod_summary.jsp?code=68HC11P1&no d> &nod eId=01624684498635 You can also create a software SCI (using OC/IC interrupts) that will be behave just as good as the hardware one. ----- Original Message ----- From: "aporaria" <> To: < > Hi; > I am considering HC11 for a design which might require two or more > serial interface, two of these serial would be standard RS232 to PC. > I understand that there is an SCI port which may easily be connected > to a standard PC. I am however, not sure about SPI. > I am wondering > > 1) If I can use SPI to communicate using RS232 standards (like SCI)? > > 2) Is there any version of HC11 with more than two serial ports? _____ > Service. [Non-text portions of this message have been removed]

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> I am considering HC11 for a design which might require two or more > serial interface, two of these serial would be standard RS232 to PC. > I understand that there is an SCI port which may easily be connected > to a standard PC. I am however, not sure about SPI. ======================= You can hook a max3100 to the SPI, or use an HC12 (or an AVR) which has 2 SCIs [Non-text portions of this message have been removed]

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