APU429

4-Bit Micro-controller With LCD Driver Features y Low power and low voltage operation y Powerful instruction set (150 instructions) y Memory capacity Ϋʳ Instruction ROM capacity 4096 x 16 bits Ϋʳ Index ROM capacity 256 x 8 bits Ϋʳ Internal RAM capacity 384 or 256 x 4 bits y Input/Output ports of up to 20 pins y 8-level subroutine nesting y Built-in LCD driver, 8 x 42 = 336 segments y Built-in EL driver, frequency or melody generator y Built-in Resistance-to-Frequency Converter y Built-in 2-channel 6/8-bit PWM output y Built-in key strobe function (Shared with segment pin) y Built-in voltage doubler, halver, tripler quadrupler charge pump circuit y Two 6-bit programmable timers with programmable clock source y Watchdog timer y 4 external & 3 internal interrupt resources Ϋʳ External: INT, RFC, IOA/IOC/S port, keystrobe Ϋʳ Internal: TM1, TM2, Predivider y Dual clock operation y HALT and STOP function General Description The APU429 is an embedded high performance 4-bit micro-computer with an on-chip LCD driver. It contains all the necessary functions in a single chip: 4-bit parallel processing ALU, ROM, RAM, I/O ports, timer, clock generator, dual clock, RFC, EL-light, LCD driver, look-up table, watchdog timer and keyboard scanning. The instruction set includes not only 4-bit operation and manipulation instructions but also various conditional branch instructions and LCD driver data transfer instructions which are powerful and easy to use. The HALT function stops...