GENERAL DESCRIPTION
The MX10EXA is a member of Philips’ 80C51 XA (eXtended Architecture) family of high performance 16-bit single-chip microcontrollers.
The MX10EXA contains 64k bytes of Flash program memory, and provides three general purpose timers/counters, a watchdog timer, dual UARTs, and four general purpose I/O ports with programmable output configurations.

FEATURE
• 4.5V to 5.5V
• 64K bytes of on-chip Flash program memory with In System Programming capability
• Five Flash blocks = two 8k byte blocks and three 16k byte blocks
• Single supply voltage In-System Programming of the Flash memory, (VPP=VDD or VPP=12V if desired)
• Boot ROM contains low level Flash programming routines for In-Application Programming and a default serial loader using the UART
• 2048 bytes of on-chip data RAM
• Supports off-chip program and data addressing up to 1 megabyte (20 address lines)
• Three standard counter/timers with enhanced features All timers have a toggle output capability
• Watchdog timer
• Two enhanced UARTs with independent baud rates
• Seven software interrupts
• Four 8-bit I/O ports, with 4 programmable output configurations for each pin
• 30 MHz operating frequency at 5V
• Power saving operating modes: Idle and PowerDown.Wake-Up from power-down via an external interrupt is supported.
• 44-pin PLCC (MX10EXAQC) Commercial grade
• 44-pin LQFP (MX10EXAUC) Commercial grade
• 44-pin PLCC (MX10EXAQI) Industrial grade
• 44-pin LQFP (MX10EXAUI) Industrial grade