MV20556

MOSEL VITELIC INC. Preliminary MV20556 8 - Bit MCU Mouse Controller 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 July 1997 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 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. Pin Configuration RES RXD/P 3.0 TXD/P 3.1 XTA2 XTAL1 #INT0/P 3.2 #INT1/P 3.3 T0/P 3.4 1 2 3 4 5 6 7 8 9 10 20 19 VDD P 1.7 P 1.6 P 1.5 P 1.4 P 1.3 P 1.2 P 1.1 P 1.0 P 3.7 MV20556 20L PDIP 300 mil (Top View) 20L SOP (Top View) 18 17 16 15 14 13 12 11 Ordering Information MV20556ajk - pqrs a: process identifier. { C:=COMS } jk: working clock in MHz. { 16 } pqr: production co...