描述 Description

DESCRIPTION
Three different Single-Chip 8-Bit Microcontroller families are presented in this datasheet:
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? 8XC54/8XC58
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? 80C51FA/8XC51FA/8XC51FB/8XC51FC
??
? 80C51RA+/8XC51RA+/8XC51RB+/8XC51RC+/8XC51RD+
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For applications requiring 4K ROM/EPROM, see the 8XC51/80C31 8-bit CMOS (low voltage, low power, and high speed) microcontroller families datasheet.FEATURES
? 80C51 Central Processing Unit
? Speed up to 33 MHz
? Full static operation
? Operating voltage range: 2.7 V to 5.5 V @ 16 MHz
? Security bits:
?? – ROM – 2 bits
?? – OTP–EPROM – 3 bits
? Encryption array – 64 bytes
? RAM expandable to 64K bytes
? 4 level priority interrupt
? 6 or7 interrupt sources, depending on device
? Four 8-bit I/O ports
? Full-duplex enhanced UART
?? – Framing error detection
?? – Automatic address recognition
? Power control modes
?? – Clock can be stopped and resumed
?? – Idle mode
?? – Power down mode
? Programmable clock out
? Second DPTR register
? Asynchronous port reset
? Low EMI (inhibit ALE)

特性 Features

? 80C51 Central Processing Unit
? Speed up to 33 MHz
? Full static operation
? Operating voltage range: 2.7 V to 5.5 V @ 16 MHz
? Security bits:
?? – ROM – 2 bits
?? – OTP–EPROM – 3 bits
? Encryption array – 64 bytes
? RAM expandable to 64K bytes
? 4 level priority interrupt
? 6 or7 interrupt sources, depending on device
? Four 8-bit I/O ports
? Full-duplex enhanced UART
?? – Framing error detection
?? – Automatic address recognition
? Power control modes
?? – Clock can be stopped and resumed
?? – Idle mode
?? – Power down mode
? Programmable clock out
? Second DPTR register
? Asynchronous port reset
? Low EMI (inhibit ALE)