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MC68HC11A8  Introduction
　　The MC68HC11A8 high-performance microcontroller units (MCUs) are based on the M68HC11 Family. These high speed, low power consumption chips have multiplexed buses and a fully static design. The chips can operate at frequencies from 3 MHz to dc. The three MCUs are created from the same masks; the only differences are the value stored in the CONFIG register, and whether or not the ROM or EEPROM is tested and guaranteed.http://www.acoaj.cn   PCB抄板 
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　　For detailed information about specific characteristics of these MCUs, refer to the M68HC11 Reference Manual (M68HC11RM/AD).
　　MC68HC11A8  Features
　　M68HC11 CPU
　　Power Saving STOP and WAIT Modes
　　8 Kbytes ROM
　　512 Bytes of On-Chip EEPROM
　　256 Bytes of On-Chip RAM (All Saved During Standby)
　　16-Bit Timer System
　　- 3 Input Capture Channels
　　- 5 Output Compare Channels
　　8-Bit Pulse Accumulator
　　Real-Time Interrupt Circuit
　　Computer Operating Properly (COP) Watchdog System
　　Synchronous Serial Peripheral Interface (SPI)
　　Asynchronous Nonreturn to Zero (NRZ) Serial Communications Interface (SCI)
　　8-Channel, 8-Bit Analog-to-Digital (A/D) Converter
　　38 General-Purpose Input/Output (I/O) Pins
　　- 15 Bidirectional I/O Pins
　　- 11 Input-Only Pins and 12 Output-Only Pins (Eight Output-Only Pins in 48-Pin Package)
　　Available in 48-Pin Dual In-Line Package (DIP) or 52-Pin Plastic Leaded Chip Carrier (PLCC)
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