DESCRIPTION
The 89C51/89C52/89C54/89C58 contain a non-volatile FLASH program memory that is parallel programmable. For devices that are serial programmable (In System Programmable (ISP) with a boot loader), see the 89C51RC+/89C51RD+ datasheet. Both families are Single-Chip 8-bit Microcontrollers manufactured in advanced CMOS process and are derivatives of the 80C51
microcontroller family. All the devices have the same instruction set as the 80C51.

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