68705_EVM_jun85 68705 EVM Jun85
User Manual: 68705_EVM_jun85
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ MICROSYSTEMS 1_ ® MOTOROLA M68705EVM M1468705EVM MC68705 and MC1468705 Evaluation Modules • Economical Means of Evaluating and Programming the Following EPROM MCU's - MC6870SP3, R3, U3 (part #M6870SEVM) - MC146870SG2 (RS7 Mask) (Part #M146870SEVM) • Requires Only Power Supply and Terminal for Operation • Monitor/Debugger Uses SYMbug-Type Syntax • One Line Assembler/Disassembler • Cassette Download/Upload • Centronics Compatible Printer Port • Dual Memory Maps: 4K ROM 4K RAM - Monitor Map User Map • Programmer for On-Chip EPROM • Target MCU I/O Available • On-Chip A/D (MC6870SR3) and Timer • Power-On Reset • User Reset/Abort Switches • External Clock Input • Wirewrap Area The M6870S/146870S Evaluation Modules (EVM) are economical vehicles for evaluating the MC6870S and MC146870S Microcomputer Units (MCU) by providing all of the essential timing and I/O interface circuitry. The EVM vastly simplifies user operation of the MCU im plementation. A block diagram of the EVM is shown in Figure 1. Centronics is a trademark of Centronics Inc. SYMbug is a trademark of Motorola Inc. Operation of an MC6870S or MC146870S is simulated by the resident MC680S or MC14680S MCU. Data transfer within the EVM is controlled by the monitor ROM firmware. I n turn, this ROM is controlled from an external RS-232C compatible user terminal. User object code may be downloaded to the user program RAM via the host port; a cassette port is also provided for this purpose. The host and terminal port ACIA's are baud rate strap-selectable from 110 to 19.2 Kbps in eight steps. The MCU parallel I/O ports allow the user to connect externally to the simulated MCU I/O lines. These lines are also used to control the MC6870S or MC146870S MCU's on-Chip EPROM programmer. This is accomplished by inserting the MCU into the programmer socket and executing the appropriate monitor commands. A user jumper-select option allows either the on-board clock or an external clock to be used. A printer port is also provided with a Centronics compatible pin-out. Special user circuits may be added on a wirewrap area on the board. Figure 2 illustrates the memory maps for·the Evaluation Modules. Table 1 describes the Monitor Command Set used with the modules. OS4050 ©MOTOROLA INC., 1984 MICROSYSTEMS _ M68705EVM M1468705EVM FIGURE 1 - EVM Block Diagram CONTROL MCU AD DR MC6805R2 on M68705 EVM DATA or CNTL MC146805G2 on M1468705EVM r-------I___ TIMER I USER I-'-~__________________~ : APPLICATION L- - - - ~_____ __ ...J DECODE & MAP SWITCH LOGIC (MONITOR) A/D Cl Cl « f« Cl a: II: a: (M68705EVM ONLY) « 0 I-- Z 0 ~ 0 ..J I-Z 0 a: 0 f- I-- 0 0 Z Z ~ (USER) a: ..J « I-« z Cl Cl I-- a: w a: a: w W « en ::> Cl 0 en en ::> ::> RAM STACK ~ USER PSEUDO ROM RAM STACK MONITOR ROM USER I/O PORTS r - - - - - , ... __a....-~ I TERMINAL: ~ ___ __ J --:-- TERMINAL RS-232C PORT I I BAUD RATES r0"P~I (;'N-;' ~ ~ f -O~~~N-;'~ -1 ..--=------1 SOFTWARE I I DEVELOPMENT I _ _ _--.-. IL _ _ SYSTEM _ _ _ _ -JI ~l ~':':L~C~~O~ J L--_ _ _..... CLOCK ~ _ J ON-CHIP EPROM PROGRAMMER & READER 4FO .':N----.:....:..-I---+---e I EXTERNAL 1------..,1-------... -'<>_ IL _ CLOCK _ _ _ _ .JI I nf--C"s~;--l CASSETTE PORT HOST RS-232C PORT -----, PRINTER PORT : OPTIONAL I L - - - - -.:""I . . CENTRONICS I ~ _~~:"E~_J MICROSYSTEMS _ M68705EVM M1468705EVM FIGURE 2 - USER MAP MONITOR MAP TERMINAL - CNTL -DATA HOST - CNTL -DATA CASSETTE - DATA -CNTL PRI NTER - DATA -CNTL RESERVED RESERVED RESERVED RESERVED USER STACK PNTR MONITOR CNTL RESERVED RESERVED EVM Memory Maps $000 2 3 4 5 6 7 S 9 A B C D E F PORT A - DATA PORT B - DATA PORT C - DATA PORT D - DATA PORT A - DDR PORT B - DDR PORT C - DDR PORT D - DDR TIMER - DATA TIMER - CNTL MISC REG PROG CNTL REG NOT USED NOT USED A/D - CNTL A/D - RESULT - - - - ON CHIP (M6S705EVM ONLY) ON CHIP $010 MONITOR RAM/STACK • • USER RAM/STACK $07F $OSO • • • • MONITOR ROM • • • • • $7F7 $7FS $7FF $SOO MONITOR ROM VECTORS • • • • • • • • • • $FF7 $FFB ($1 FFS) $FFF ($1 FFF) USER PSEUDO ROM VECTORS* (2K MAP) WRITE-PROTECTED DURING USER PROGRAM EXECUTION USER PSEUDO ROM VECTORS* (4K MAP) * For P3, at $7FF For R3, U3, at $FFF For G2, at $1 FFF MICROSYSTEMS _ M68705EVM M1468705EVM TABLE 1 - Monitor Command Set Command Description ASMBF BR [ [ [ ]]] G [ ] lOAD [ ] MD [ ] MM NOPA P [ ] PA PROG RD READ RM TPlD [ ] TPDU T [ ] TM [ ] Assembler/Disassembler (Interactive) Block Fill Address Range With Data Define Breakpoint(s) Go (Execute) Download Memory From Host File Memory Display Address Range Memory Modify (Interactive) Detach Printer Proceed (From Breakpoint) Printer Attach Program EPROM Register Display Read EPROM Register Modify (I nteractive) load Memory From Cassette Tape Dump Memory To Cassette Tape Trace I nstruction(s) Enter Transparent Mode Mechanical and Environmental Specifications I nput Voltages: +5 Volts at 1.0 A ±12 Volts at 0.4 A +27 Volts at 50 mA (M68705EVM Programmer only) Operating Frequency: 4.0 MHz on-board clock (1.0 MHz bus frequency) EXT ClK range of the MCU being evaluated Operating Environment: O°C to 55°C Dimensions (l x W x H) 9.75 in. x 14.5 in. x 1.2 in. (24.8 cm x 37.8 cm x 3.0 cm) Ordering Information Part Number Description M68705EVM* MC68705P3, R3, or U3 Evaluation Module including User's Manual M 1468705 EVM * MC1468705G2 Evaluation Module including User's Manual M68705EVM/D1 M68705 Evaluation Module User's Manual M1468705EVM/D2 M1468705 Evaluation Module User's Manual Options M68RS232M RS-232C Adapter Cable, 3 ft. flat cable; edge conn.!male DB25 conn. M68RS232F RS-232C Adapter Cable, 3 ft. flat cable; edge conn.!female DB25 conn. *The M68705EVM and M1468705EVM are not processor interchangeable products. Motorola reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Motorola does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. The software described herein will be provided on an "as is" basis and without warranty. Motorola accepts no liability for incidental or consequential damages arising from use of the software. This disclaimer of warranty extends to Motorola's licensee, to licensee's transferees and to licensee's customers or users and is in lieu of all warranties whether expressed, implied or statutory, including implied warranties of merchantability or fitness for a particular purpose. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Employment Opportunity/Affirmative Action Employer. ® _® MOTOROLA Semiconductor Products Inc. p.o. 15542-4 PRINTED IN USA 6-85 IMPERIAL LITHO C31475 12,000 BOX 20912 • PHOENIX, ARIZONA 85036 • A SUBSIDIARY OF MOTOROLA INC.
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