4-Bit Micro-Controller with LCD Driver, 1K Word
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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: 1024 x 15 bits.
· RAM size: 48 x 4 bits.
· Input ports: 1 port/ 4 pins (M-PORT).
· Control output: ALARM.
· LCD driver outputs (can drive up to 60 LCD segments).
· Mask option to select 3 LCD drive modes: static, duplex 1/2 duty 1/2 bias, 1/3 duty 1/2 bias.
· Mask option permits LCD driver output pins to be used for DC output ports. Up to 20 pins are
available. SEG13-SEG20 can be selected by open-drain output.
· Segment PLA circuit permits any layout on the LCD panel.
· Built-in clock generator (crystal or RC).
· Built-in voltage doubler, halver.
GENERAL DESCRIPTION
TheAPU4006 is a single-chip 4-bit microcontroller with LCD drivers. It can drive up to 3 common time
20 segments, i.e. 60 segments LCD driver. This 4-bit microcontroller contains a 4-bit parallel
processing ALU, 1024 x 15-bit program ROM, 48 x 4-bit data RAM, input ports, alarm driver, timer,
clock generator, crystal and RC oscillator circuit, LCD driver and 70 powerful instructions in a single
chip. It uses HALT instruction to stop all internal operations other than the timer, clock generator,
crystal/RC oscillator and LCD driver. Very low current dissipation can be easily achieved by
combining 4 types of interrupt function and HALT instruction to minimize the operation cycle.
BLOCK DIAGRAM
OUTPUT
PORT
INPUT
PORT
OSCILLATOR
6 BITS PRESET
TIMER
ALU RAM 48 X 4 BITS
LCD DIRVER
SEGMENT PLA
PRE-DIVIDER
CONTROL
CIRCUIT
4 LEVELS STACK
INSTRUCTION
DECODER
10 BITS PROGRAM
COUNTER
PROM
1024 X 15 BITS
4 BITS DATA BUS
VDD1~2SEG1~20COM 1~3M1~4ALARM
OSC
IN
OSC
OUT
CUP 1
CUP 2
RESET INT
APLUS APU4006