M68HC11EVBU UNIVERSAL EVALUATION BOARD USER'S MANUAL ADDENDUM MOT

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M68HC11EVBU UNIVERSAL EVALUATION BOARD USER'S MANUAL ADDENDUM MOT

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M68HC11EVBU2/D April 1998
M68HC11EVBU UNIVERSAL EVALUATION BOARD USER'S MANUAL ADDENDUM
MOTOROLA Inc. 1990, 1998; Rights Reserved
Motorola reserves right make changes without further notice products herein improve reliability, function, design. Motorola does assume liability arising application product circuit described herein; neither does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part.
computer program stored Read Only Memory device contains material copyrighted Motorola Inc., first published 1990, used only under license such License Computer Programs (Article contained Motorola's Terms Conditions Sale, Rev. 1/79.
Motorola Inc. Equal Opportunity/Affirmative Action Employer. Motorola Motorola logo registered trademarks Motorola Inc.
USER'S MANUAL ADDENDUM
Introduction M68HC11EVBU2 promotional version standard M68HC11EVBU. This document describes upgrade modifications that have been made original. byte added wire-wrap area provide more user memory. This accessible from address location $8000 through $FFFF except where on-chip resource higher priority. board defaults normal-expanded mode rather than single-chip mode this additional used. M68HC11EVBU2 normal configuration, MC68HC11E9 on-chip occupies address space from $D000 through $FFFF. factory test pattern uses from $D000 through $DFFF BUFFALO monitor program uses space from $E000 through $FFFF. on-chip EEPROM occupies space from $B600 through $B7FF. BUFFALO monitor does this spaces from $8000 through $B5FF $B800 through $CFFF available user. original M68HC11EVBU board cut-trace short across jumper header holds MCU's MODA forces board restart normal single chip mode. This short been removed from M68HC11EVBU2 board board normally resets into normal expanded mode. While EVBU2 expanded mode, Ports defined multiplexed address/data these port pins available general purpose pins they were original M68HC11EVBU. addition MCM60L256), EVBU2 74HC373 latch (U6) 74HC00 quad NAND (U8). latch de-multiplexes order addresses from port MCU. 74HC00 decodes select signal $8000 through $FFFF area memory map. Even though external selected when internal accessed, there conflict because MC68HC11E9 ignores external data during those cycles. operate M68HC11EVBU2 board special expanded test mode with IRVNE control HPRIO register This mode requested when EVBU2 reset with shorting jumper installed jumper installed This could cause data fight between external data drivers port during visible internal access cycles. This conflict could interfere with normal operation. cut-trace jumper header (J16) also added EVBU2. board trace normally shorts pins this jumper. unlikely event that want replace byte (U7) with byte device, shorting trace between pins short J16. byte no-connect connects logic hightrue enable input byte RAM. resulting address decode byte would cause mapped $8000-9FFF, $A000-BFFF, $C000-DFFF, $E000-FFFF. Although this looks like same mapping device, could store different values
M68HC11EVBU2/D
USER'S MANUAL ADDENDUM
$8000, $A000, $C000, $E000 because these addresses select same physical byte RAM. leave cut-trace short intact install device, would mapped $A000-BFFF $E000-FFFF (only where equal Using Ports general purpose pins Remove (U7) from socket, place jumper across jumper header This makes EVBU2 look just like unmodified M68HC11EVBU. jumper cause board reset into single chip mode ports general purpose pins rather than being used multiplexed address/data bus. Using PCbug11 PCbug11 expects board reset special bootstrap mode, place jumpers across When reset board, bootstrap mode selected PCbug11 expects. Schematic schematic provided next four pages. first three pages identical original M68HC11EVBU except default cut-trace shorting been removed. Sheet shows byte associated circuitry.
M68HC11EVBU2/D
USER'S MANUAL ADDENDUM
M68HC11EVBU2/D
USER'S MANUAL ADDENDUM
M68HC11EVBU2/D
USER'S MANUAL ADDENDUM
M68HC11EVBU2/D
USER'S MANUAL ADDENDUM
M68HC11EVBU2/D

M68HC11EVBU UNIVERSAL EVALUATION BOARD USER'S MANUAL ADDENDUM MOT

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