This application note demonstrates how the XicorX84041 MPS E2PROM can be interfaced to the68HC11 microcontroller family when connected asshown in Fig. 1. The interface uses the timemultiplexedaddress/data bus and two control lines ofthe 68HC11 to interface to the MPS E2PROM.Although the X84041 requires minimal glue logic, 3-NAND gates when connected to the 68HC11, theadvantage of the MPS E2PROM as a port-less serialmemory device is still preserved. The 68HC11assembly code listing for this application note can beobtained from the Xicor BBS, FaxBack system, orXicor\'s website. The Xicor BBS can be reached at 1-800-258-8864, or in the (408) area code andinternationally at 1-408-943-0655. Xicor’s BBS willsupport up to a 14.4K baud rate modem (8 bits, noparity, 1 stop bit, and no local echo). The listing canbe found in the MOTOROLA file library. Xicorapplication notes are also available through Xicor\'sFaxBack system at (408) 954-1627 and from theWWW using the URL: http://www.xicor.com.
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