HD44795

The HD44795 is the CMOS 4-bit single chip microcomputer which contains ROM,RAM,I/O,Timer/Event counter and control circuit,direct drive circuit for LCD on single chip.The HD44795 is designed to drive LCD directy and perform efficient controller function as well as arithmetic function for both binary and BCD data.

Features of the HD44795 are:(1)4-bit architecture; (2)2,048 words of program ROM(10 bit/word);128 words of pattern ROM(10 bits /word); (3)160 digits of data RAM and display data RAM(4 bits/digit); (4)control circuit and direct drive circuit for LCD:4 commons ;32 segments.; (5)32I/O lines and 2 external interrupt lines; (6)timer/event counter; (7)all instructions except one instruction;single word and single cycle; (8)BCD arthmetic instructions; (9)pattern generation instruction:table look up capability.

The absolute maximum ratings of the HD44795 can be summarized as:(1)supply voltage:-0.3~7.0V; (2)pin voltage:-0.3~Vcc+0.3V; (3)pin voltage:0.3~10.0V; (4)maximum total output current:45mA; (5)operating temperature:-40~85; (6)storage temperature:-55~125.If you want to know more information such as the electrical characteristics of HD44795, please download the datasheet in www.seekic.com or www.chinaicmart.com.