问   请教89C52与89S52的主要区别是什么?谁有这方面的资料?在哪下载或者发给我.非常感谢!  E-mail: blueicewind@126.com 答 1: 89c52停产了，89s52是其替代品 答 2: 我上次就是吃了个亏！AT89C52的管脚驱动能力强于S52.电器特性有点差异！ 答 3: 去“侃单片机”坛子里看老贴 答 4: -_-b80c51 FEATURES
• 80C51 Central Processing Unit
• On-chip FLASH Program Memory
• Speed up to 33 MHz
• Full static operation
• RAM expandable externally to 64 k bytes
• 4 level priority interrupt
• 6 interrupt sources
• 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)
• 3 16-bit timers
• Wake up from power down by an external interrupt

AT89S52 的
Features
• Compatible with MCS-51® Products
• 8K Bytes of In-System Programmable (ISP) Flash Memory
– Endurance: 1000 Write/Erase Cycles
• 4.0V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 33 MHz
• Three-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Eight Interrupt Sources
• Full Duplex UART Serial Channel
• Low-power Idle and Power-down Modes
• Interrupt Recovery from Power-down Mode
• Watchdog Timer
• Dual Data Pointer
• Power-off Flag
• Fast Programming Time
• Flexible ISP Programming (Byte and Page Mode)