8Bit CMOS Microcontroller
• Full upward compatibility with standard 8051 microcontroller
• Up to 16 MHz external operating frequency
– 750 ns instruction cycle at 16 MHz operation
• On-chip program memory
– C513AO-2R: 16 Kbytes ROM with optional ROM protection
– C513AO-2E: 16 Kbytes OTP
– : version without on-chip program memory ROMless
• Up to 64K byte external data memory
•256 ×8 RAM
•256 ×8 XRAM
• Four 8-bit digital I/O ports
• Three 16-bit timers/counters Timer 2 with Up/Down and 16-bit auto-reload features
• Full duplex serial interface USART
• Synchronous Serial Channel SSC
• Seven interrupt sources with two priority levels
• On-chip emulation support logic Enhanced Hooks Emulation Technology™