SCI/SPI

[aru]

Due to the inaccessibility of Motorola's HC11EVB, I'm switching over to the NMIY-0020-FP EVB. One feature that I liked on the old EVB is that there were 2 RS-232 ports, one for SPI and the other for SCI so I could use the SPI to communicate with the terminal (Buffalo) and the SCI to communicate with other RS232 devices to receive data from them. The new EVB only has 1 RS232 port and I'm having trouble figuring out how to take advantage of the SCI and SPI ports on this new board (I know that the F68HC11 has capabilities for both SCI and SPI). Any help would be greatly appreciated. Thanks. <br>

[jya]

I'm intrigued by the notion of SPI -- serial peripheral interface -- used for RS-232. It is a very nice 2- or 3-wire interface to peripheral chips. There are SPI A/D and D/A converters, serial memory chips, and the like. Perhaps there is also an SPI UART. If they're smart enough to recognize addresses, or if you provide individual select lines, you can have more than one peripheral in a single SPI connection. Look in chapter 8 of the 68HC11 manual, available in PDF format frpm Motorola as Hc11m.pdf.<p>Jerry<br>----------<br>Engineering is the art of making what you want from things you can get.<br><p>Edited by: jya