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EF6805P2 Datasheet(PDF) 1 Page - STMicroelectronics |
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EF6805P2 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 31 page  EF6805U3 March 1989 8-BIT MICROCOMPUTER UNIT . 32 TTL/CMOS COMPATIBLE I/O LINES . 24 BIDIRECTIONAL (8 lines are LED compati- ble) . 8 INPUT-ONLY . 3776 BYTES OF USER ROM . 112 BYTES OF RAM . SELF-CHECK MODE . ZERO-CROSSING DETECT/INTERRUPT . INTERNAL 8-BIT TIMER WITH 7-BIT SOFT- WARE PROGRAMMABLE PRESCALER AND CLOCK SOURCE . 5V SINGLE SUPPLY SOFTWARE FEATURES . 10 POWERFUL ADDRESSING MODES . BYTE EFFICIENT INSTRUCTION SET WITH TRUE BIT MANIPULATION, BIT TEST, AND BRANCH INSTRUCTIONS . SINGLE INSTRUCTION MEMORY EXA- MINE/CHANGE . POWERFUL INDEXED ADDRESSING FOR TABLES . FULL SET OF CONDITIONAL BRANCHES . MEMORY USABLE AS REGISTER/FLAGS . COMPLETE DEVELOPMENT SYSTEM SUP- PORT ON INICE USER SELECTABLE OPTIONS . 8 BIDIRECTIONAL I/O LINES WITH TTL OR TTL/CMOS INTERFACE OPTION . 8 BIDIRECTIONAL I/O LINES WITH TTL OR O- PEN-DRAIN INTERFACE OPTION . CRYSTAL OR LOW-COST RESISTOR OSCIL- LATOR OPTION . LOW VOLTAGE INHIBIT OPTION . VECTORED INTERRUPTS : TIMER, SOFT- WARE, AND EXTERNAL . USER CALLABLE SELF-CHECK SUBROU- TINES HARDWARE FEATURES DESCRIPTION The EF6805U3 Microcomputer Unit (MCU) is a member of the 6805 Family of low-cost single-chip Microcomputers. The 8-bit microcomputer contains a CPU, on-chip CLOCK, ROM, RAM, I/O, and TI- MER. It is designed for the user who needs an eco- nomical microcomputer with the proven capabilities of the 6800-based instruction set. A comparison of the key features of several members of the 6805 Fa- mily of Microcomputers is shown at the end of this data sheet. The following are some of the hardware and software highlights of the EF6805U3 MCU. 1 PIN CONNECTIONS FN (PLCC 44) P (PDIP40) 1/31 |
Similar Part No. - EF6805P2 |
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Similar Description - EF6805P2 |
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