Description
The MVI MV20556 is an 8 - bit single chip microcontroller. It provides hardware features and powerful instruction set that are necessary to make it a versatile and cost effective controller for mouse applications which needs up to 4K byte internal memory either for program or for data and mixed.
A serial input / output port is provided for I/O expansion, Inter - processor communications, full duplex UART.

Features
■ General 8051 instruction family compatible
■ Operate at voltage 5.0V.
■ No External Memory is supported
■ 8 bit bus I/O ports
■ 4 K byte ROM
■ 128 byte RAM
■ 128 byte depth stack
■ Two 16 bit Timers (Event Counters)
■ 15 programmable I/O pins
■ Five interrupt sources
■ Programmable serial UART channel
■ Direct LED drive output
■ Bit operation instructions
■ Page free jumps
■ 8 - bit Unsigned Division
■ 8 - bit Unsigned Multiply
■ BCD arithmatic
■ Direct Addressing
■ Indirect Addressing
■ Nested Interrupt
■ Two priority level interrupt
■ A full duplex serial I/O port
■ Working at 16/25/40 MHz Clock
■ Full static operation: 3 MHz through 16 MHz