CTM8B55E

www.DataSheet4U.com CTM8B54E/55E/56E/57E EPROM-Based 8-Bit CMOS Microcontroller FEATURES Total of 33 single word instructions . The fast execution time may be 200ns for all single cycle instructions under 20MHz operating. Operating voltage range: 2.3V ~ 6.5V 8-bit data bus. 14-bit instruction word. Four-level stacks. On chip EPROM size : 512x14 bits for CTM8B54E/55E, 1Kx14 bits for CTM8B56E, 2Kx14 bits for CTM8B57E. Internal RAM size : 25 bytes for CTM8B54E/56E, 24 bytes for CTM8B55E, 72 bytes for CTM8B57E. Direct and indirect addressing modes for data accessing 8-bit real time clock/counter with 8-bit programmable prescaler. Internal power-on Reset. Device Reset Timer. Code protection. Sleep mode for power saving. On chip Watchdog Timer(WDT) based on internal RC oscillator. Three I/O ports PA, PB nad PC with independent direction control. 4 types of oscillator can be selected by code options: - RC : Low-cost RC oscillator - XTAL : Standard crystal oscillator - HFXTAL : High frequency crystal oscillator - LFXTAL : Low frequency crystal oscillator GENERAL DESCRIPTION CTM8B5X series is an EPROM based 8-bit microcontroller which employs a full CMOS technology enhanced with low-cost, high speed and high noise immunity. Watchdog Timer, RAM, EPROM, tri-state I/O port, power down mode, and real time programmable clock/counter are integrated into this chip. CTM8B5X contains 33 instructions, all are single cycle except for program branches which ...