MTU418 View Datasheet(PDF) - Myson Century Inc

Part Name

Description

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MTU418

4-Bit Micro-Controller with LCD Driver, 1K Word

Myson Century Inc 

MYSON

TECHNOLOGY

MTU418

4-Bit Micro-Controller with LCD Driver, 1K Word

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

The MTU418 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

ALARM

M1~4

COM 1~3

SEG1~20

VDD1~2

OUTPUT

PORT

INPUT

PORT

LCD DIRVER

SEGMENT PLA

OSC

IN

OSC

OSCILLATOR

OUT

4 BITS DATA BUS

6 BITS PRESET

TIMER

ALU

RAM 48 X 4 BITS

CUP 1

CUP 2

PRE-DIVIDER

CONTROL

CIRCUIT

RESET INT

10 BITS PROGRAM

COUNTER

4 LEVELS STACK

INSTRUCTION

DECODER

PROM

1024 X 15 BITS

This datasheet contains new product information. Myson Technology reserves the rights to modify the product specification without

notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.

MTU418 Revision 2.5 01/15/1997

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