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EF6805U3FND Datasheet PDF - STMicroelectronics

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EF6805U3FND
ST-Microelectronics
STMicroelectronics ST-Microelectronics
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EF6805U3FND Datasheet PDF : EF6805U3FND pdf     
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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 TIMER. It is designed for the user who needs an economical microcomputer with the proven capabilities of the 6800-based instruction set. A comparison of the key features of several members of the 6805 Family 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.

HARDWARE FEATURES
. 32 TTL/CMOS COMPATIBLE I/O LINES
. 24 BIDIRECTIONAL (8 lines are LED compatible)
. 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 SOFTWARE 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 SUPPORT 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 OPEN-DRAIN INTERFACE OPTION
. CRYSTAL OR LOW-COST RESISTOR OSCILLATOR OPTION
. LOW VOLTAGE INHIBIT OPTION
. VECTORED INTERRUPTS : TIMER, SOFTWARE, AND EXTERNAL
. USER CALLABLE SELF-CHECK SUBROUTINES

 

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