APU4003

Features:

􀁹􀀃 Very low current dissipation
􀁹􀀃 Wide operating voltage range
􀁹􀀃 Supports both Ag and Li batteries
􀁹􀀃 Powerful instruction set
􀁹􀀃 4-level subroutine nesting (including interrupt)
􀁹􀀃 4 event driven interrupts, 2 external and 2 internal
􀁹􀀃 ROM size: 1024x15 bits
􀁹􀀃 RAM size: 64x4 bits
􀁹􀀃 Input ports: 2 ports/8 pins (S and M)
􀁹􀀃 Output port: 1 port/4 pins (P)
􀁹􀀃 Pseudo serial output port (P)
􀁹􀀃 Input/output ports: 2 ports/8 pins (I/OA and I/OB)  􀁹􀀃 Control outputs: ALARM, LIGHT
􀁹􀀃 LCD driver outputs(can drive up to 75 LCD segments)
􀁹􀀃 Mask option to select 4 LCD drive modes: static,duplex (1/2 duty 1/2 bias, 1/3 duty 1/2 bias or 1/3 duty 1/3 bias)
􀁹􀀃 Mask option permits LCD driver output pins to  be  used for DC output ports; up to 25 pins are available
􀁹􀀃 Segment PLA circuit permits any layout on LCDpanel
􀁹􀀃 Built-in clock generator (crystal or RC)
􀁹􀀃 Built-in voltage doubler, halver, tripler


Pinout




Specifications

Name	Symbol	Rating	Unit
Maximum Supply Voltage	VSS1	-5.5 ~ +0.3	V
	VSS2	-5.5 ~ +0.3	V
	VSS3	-5.5 ~ +0.3	V
Maximum Input Voltage	V1N1	VSS1-0.3 to +0.3	V
Maximum Output Voltage	VOUT1	VSS2-0.3 to +0.3	V
	VOUT2	VSS3-0.3 to +0.3	V
	VOUT3	VSS4-0.3 to +0.3	V
Maximum Operating Temperature	TOPG	0 to +70
Maximum Storage Temperature	TSTG	-25 to +125

Description

The APU4003 is a single chip 4-bit micro-controller with LCD drivers. It can drive up to 3 common times or 25 segments, i.e. a 75-segment LCD driver. This 4-bit micro-controller contains a 4-bit parallel processing ALU, 1024x15-bit program ROM, 64x4-bit data RAM,input/output ports, alarm driver, timer, clock generator,crystal and RC oscillator circuit, LCD driver and 79   powerful instructions in a single chip. The HALT instruction can be used to stop all internal operations other than timer, clock generator, crystal/RC oscillator and LCD driver. Very low current dissipation can be easily achieved by combining 4 kinds of interrupt functions and HALT instruction to minimize the operation cycle.