Question

51单片机由哪几部分组成

Answer 1

AT89S51：
8051 based Full Static CMOS controller with Three-Level Program Memory Lock
32 I/O lines, 2 Timers/Counters, 6 Interrupts Sources, Watchdog Timer, 2 DPTRs
4K Flash, 128 Bytes On-chip RAM
－－－－－－－－－－－－－－－－－－－－－－
AT89S52：
8051 based Full Static CMOS controller with Three-Level Program Memory Lock
32 I/O lines, 3 Timers/Counters, 8 Interrupts Sources, Watchdog Timer, 2 DPTRs
8K Flash Memory, 256 Bytes On-chip RAM

采纳答案，错误太多了。