AT89S51 Microcontroller

FEATURES:  

• 4K 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  

• 128 x 8-bit Internal RAM  

• 32 Programmable I/O Lines  

• Two 16-bit Timer/Counters  

• Six 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)  

SPECIFICATIONS:  

• Core Processor: 8051        
• Data Bus Width: 8 bit        
• Maximum Clock Frequency: 33 MHz  
• Program Memory Size: 4 KB        
• Program Memory Type: Flash       
• RAM Size: 128 B      
• ADC: No                                           
• Number of Programmable I/Os: 32            
• Number of Timers: 2               
• Supply Voltage Range: 4 V to 5.5 V  
• Package: PDIP