MCU 8-Bit MCS51 CISC 4KB ROM 5 Volt 40-PinSpecifications High performance CHMOS EPROM 24 MHz operation Improved quick-pulse programming algorithm 3-Level program memory lock Boolean processor 128-Byte data RAM 32 Programmable I/O lines Two 16-bit timer/counters Extended temperature range (-40C to 85C) 5 Interrupt sources Programmable serial port TTL-and CMOS-compatible logic levels 64K External program memory space 64K External data memory space ONCE mode facilitates system testing Power control modes: Idle and Power down
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