APU429

Features:

􀁹􀀃 Low power and low voltage operation
􀁹􀀃 Powerful instruction set (150 instructions)
􀁹􀀃 Memory capacity Instruction ROM capacity 4096 x 16 bits Index ROM capacity 256 x 8 bits Internal RAM capacity 384 or 256 x 4 bits
􀁹􀀃 Input/Output ports of up to 20 pins
􀁹􀀃 8-level subroutine nesting
􀁹􀀃 Built-in LCD driver, 8 x 42 = 336 segments
􀁹􀀃 Built-in EL driver, frequency or melody generator
􀁹􀀃 Built-in Resistance-to-Frequency Converter
􀁹􀀃 Built-in 2-channel 6/8-bit PWM output  􀁹􀀃 Built-in key strobe function(Shared with segment pin)
􀁹􀀃 Built-in voltage doubler, halver, tripler quadrupler charge pump circuit
􀁹􀀃 Two 6-bit programmable timers with programmable clock source
􀁹􀀃 Watchdog timer
􀁹􀀃 4 external & 3 internal interrupt resources External: INT, RFC, IOA/IOC/S port,keystrobe Internal: TM1, TM2, Predivider
􀁹􀀃 Dual clock operation
􀁹􀀃 HALT and STOP function


Pinout




Specifications

Name	Symbol	Rating	Unit
Maximum Supply Voltage	VDD1	-0.3~+5.5	V
	VDD2	-0.3~+5.5	V
	VDD3	-0.3~+8.5	V
	VDD4	-0.3~+8.5	V
Maximum Input Voltage	V1N1	-0.3 to VDD1/2+0.3	V
Maximum Output Voltage	VOUT1	-0.3 to VDD1/2+0.3	V
	VOUT2	-0.3 to VDD3+0.3	V
Maximum Operating Temperature	TOPG	0 to +70
Maximum Storage Temperature	TSTG	-25 to +125

Description

The APU429 is an embedded high performance4-bit micro-computer with an on-chip LCD driver. APU429 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 any internal operations other than the oscillator, divider and LCD driver in order to minimize the power dissipation.The STOP function stops all the clocks in the chip.