Description
Atmel TS8xC51Rx2 is a high performance CMOS ROM, OTP, EPROM and ROMless versions of the 80C51 CMOS single chip 8-bit microcontroller.
The TS8xC51Rx2 retains all features of the 80C51 with extended ROM/EPROM capacity (16/32/64 Kbytes), 256 bytes of internal RAM, a 7-source , 4-level interrupt system, an on-chip oscilator and three timer/counters.
In addition, the TS80C51Rx2 has a Programmable Counter Array, an XRAM of 256 or 768 bytes, a Hardware Watchdog Timer, a more versatile serial channel that facilitates multiprocessor communication (EUART) and an X2 speed improvement mechanism.

FEATUREs
• 80C52 Compatible
   – 8051 pin and instruction compatible
   – Four 8-bit I/O ports
   – Three 16-bit timer/counters
   – 256 bytes scratchpad RAM
• High-Speed Architecture
   – 40 MHz @ 5V, 30MHz @ 3V
   – X2 Speed Improvement capability (6 clocks/machine cycle)
   – 30 MHz @ 5V, 20 MHz @ 3V (Equivalent to
   – 60 MHz @ 5V, 40 MHz @ 3V)
• Dual Data Pointer
• On-chip ROM/EPROM (16K-bytes, 32K-bytes, 64K-bytes)
• On-chip eXpanded RAM (XRAM) (256 or 768 bytes)
• Programmable Clock Out and Up/Down Timer/Counter 2
• Programmable Counter Array with
   – High Speed Output,
   – Compare / Capture,
   – Pulse Width Modulator,
   – Watchdog Timer Capabilities
• Hardware Watchdog Timer (One-time enabled with Reset-Out)
• 2 extra 8-bit I/O ports available on RD2 with high pin count packages
• Asynchronous port reset
• Interrupt Structure with
   – 7 Interrupt sources,
   – 4 level priority interrupt system
• Full duplex Enhanced UART
   – Framing error detection
   – Automatic address recognition
• Low EMI (inhibit ALE)
• Power Control modes
   – Idle mode
   – Power-down mode
   – Power-off Flag
• Once mode (On-chip Emulation)
• Power supply: 4.5-5V, 2.7-5.5V
• Temperature ranges: Commercial (0 to 70oC) and Industrial (-40 to 85oC)
• Packages: PDIL40, PLCC44, VQFP44 1.4, PLCC68, VQFP64 1.4