MYSON MTU418 Datasheet
MYSON
TECHNOLOGY
MTU418
4-Bit Micro-Controller with LCD Driver, 1K Word
This datasheet contains new product information. Myson Technology reserves the rights to mo dify the product specification without
notice. No liability is assumed as a result of the use of this product. No rights under any patent accompan y the sale of the product.
MTU418 Revision 2.5 01/15/1997
1/8
FEATURES
•
Very low current dissipation.
•
Wide operati ng vol tage range.
•
Supports both Ag and Li batteries.
•
Powerful instruction set.
•
4-level subroutine nesting (inc luding i nterrupt).
•
4 event dr iven interrupts, 2 exter nal 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 dr iv e up to 60 LCD segments).
•
Mask option to selec t 3 LCD drive modes: static, duplex 1/2 duty 1/2 bias, 1/3 duty 1/2 bi as.
•
Mask option permits LCD dri ver out put 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 c ircuit permi ts any layout on t he LCD panel.
•
Built-i n clock generator (crystal or RC).
•
Built - in voltage doubl er , halver.
GENERAL DESCRIPTION
The MTU418 is a single-chip 4-bit microcontr oller with LCD dr ivers. It can drive up to 3 common ti me
20 segments, i. e. 60 segments LCD driver. This 4-bit microc ontroll er c ontains a 4-bit par allel
processing ALU, 1024 x 15- bit program ROM, 48 x 4-bit data RAM, input ports, alar m driver, timer ,
clock generator, crystal and RC oscillator circuit, LCD driver and 70 powerf ul instructions in a singl e
chip. It uses HALT instruction to stop all internal operations other than the ti mer, clock generator,
crystal/RC oscillator and LCD driver. Very low current dissipat ion can be easily ac hieved by
combini ng 4 types of int errupt functi on and HALT instruction to minimize the operation cycl e.
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
VDD1~2
SEG1~20
COM 1~3
M1~4
ALARM
OSC
IN
OSC
OUT
CUP 1
CUP 2
RESET
INT
MYSON
TECHNOLOGY
MTU418
MTU418 Revision 2.5 01/15/1997
2/8
1.0 PACKAGE & CHIP INFORMATION
Chip Size 1995 x 1590 (µm2)
Pad Pitch min. 140µm
Bounding Diagram
OSCIN
OSCOUT
TESTAM4M3
M2
M1
INTPAD
RESET
ALARM
VDD2
VDD1
GND
COM2
COM3
SEG20
SEG19
SEG18
SEG17
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
VDD
CUP1
CUP2
COM1
SEG1
SEG2
SEG3
SEG4
2.0 PIN/PAD ASSIGNMENT
Unit : um
Coordinate Coordinate
Pad
No.
Name
XY
Pad
No.
Name
XY
1
GND
1909.5 1128.60 21
SEG4
85.50 199.50
2
VDD1
1909.5 1275.60 22
SEG5
234.00 88.50
3
VDD2
1757.40 1500.60 23
SEG6
381.00 88.50
4
ALARM
1610.40 1500.60 24
SEG7
519.00 88.50
5
RESET
1465.80 1500.60 25
SEG8
657.00 88.50
6
INT
1327.80 1500.60 26
SEG9
795.00 88.50
7
M1
1152.00 1500.60 27
SEG10
933.00 88.50
8
M2
1023.00 1500.60 28
SEG11
1071.00 88.50
9
M3
894.00 1500.60 29
SEG12
1209.00 88.50
10
M4
765.00 1500.60 30
SEG13
1347.00 88.50
11
TESTA
636.00 1500.60 31
SEG14
1485.00 88.50
12
OSCOUT
498.00 1500.60 32
SEG15
1623.00 88.50
MYSON
TECHNOLOGY
MTU418
MTU418 Revision 2.5 01/15/1997
3/8
13
OSCIN
155.10 1500.60 33
SEG16
1761.00 88.50
14
VDD
85.50 1132.50 34
SEG17
1909.50 219.60
15
CUP1
85.50 994.50 35
SEG18
1909.50 375.60
16
CUP2
85.50 865.50 36
SEG19
1909.50 527.10
17
COM1
85.50 736.50 37
SEG20
1909.50 678.60
18
SEG1
85.50 607.50 38
COM3
1909.50 830.10
19
SEG2
85.50 478.50 39
COM2
1909.50 981.60
20
SEG3
85.50 349.50
*Note: The substrate must connect t o GND.
3.0 PIN DESCRIPTION
Name Type Description
OSCIN
OSCOUT
I
O
Typical 32.768kHz crystal is connected across OSCIN/O S CO UT for
oscillation, R/C oscillation mode is also available.
M1 - 4 I Input pins with pull-down Tr or "L- level hold" Tr.
INT I External inter r upt request control input pin.
RESET I System reset pin with pull-down resistance.
ALARM O
Output only f or outputting 4kHz/2kHz /1kHz modulati on signal. Also can be
used to output non-m odulation si gnal.
VDD
Power supply pin f or logic unit inside LSI. When using Li version, a
capacitor must be connected ac r oss GND and VDD t o pr event logic unit
from mal functioning.
VDD1 For Ag-B mode positive power supply pi n.
VDD2 For Li-B(EXTV) mode positive power supply pin.
GND Negative power supply pin.
CUP1 - 2 O Pins for c onnec ting voltage step- up ( step- down) capacitor.
Output pi ns for LCD panel common plate.
The following pins are used in eac h c ase.
Static 1/2 duty 1/3 duty
COM1
COM2
COM3
Alternating
frequency
Ο
32Hz*
Ο
Ο
32Hz*
Ο
Ο
Ο
43Hz*
COM1 - 3
O
* Frequency can be doubl ed, quadrupled with P LA .
SEG1 - 20
O
Output pi ns for LCD panel segm ents.
* Also used as output ports with m ask opt ion.
TESTA * Test pin (for inter nal testing only).
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