Datasheet MTU420 Datasheet (MYSON)

MYSON
TECHNOLOGY

MTU420

4-Bit Micro-Controller with LCD Driver, 2K Word

FEATURES

Wide operati ng vol tage range:

•

Supply Vol tage Cycle Time Clock Usage Remark

4.5V to 5.5V
4V to 5V

2.4V to 3.3V

1.2V to 1.65V

118 instruction sets:

•

122µs,280ns
122µs,280ns

122µs,2.2us

122µs

- Binary addition, subtr ac tion, BCD adjustment, logical operati on in direct addr essing mode and index
addressing mode.

- Single- bit m anipulation (set, reset, dec ision for br anc h) .

- 4-bit input/output.

- Various conditional br anc hes.

- 16 working registers and manipulation.

- LCD driver data t r ansfer.

- Look-up table.

- Programmable opt ion.

- System clock selection.

8-level subroutine nesting.

•

Interrupt function:

•

- Exter nal fac tor: 2 (INT pin or ports S, M ) .

- Internal factor: 2 (timer, divider).

ROM/RAM capac ity:

•

- ROM capaci ty . . . . . 2048 x 16 bits.

- RAM capacity . . . . . 128 x 4 bits.

Watchdog timer.

•

Input/Output ports:

•

- Input ports . . . . . 2 por ts/8pins (S, M).

- Output port . . . . . 1 port/4pins (P).

- Pseudo serial output por t . . . . . Also used for output port.

- Input/Output ports . . . . . 2 ports/8pins (I/OA, I/OB).

2 control outputs . . . . . light, alarm.

•

LCD driver output:

•

- 26 LCD driver output s (up t o 156 LCD segments are drivable) .

- Mask option i s used to select static ½ duty, ½ bias ½ dut y , ½ bias 1/3 duty, ½ bias ¼ duty, 1/3 bias
1/3 duty, ½ bias ¼ duty and 1/3 bi as 1/6 duty drive modes of the LCD panel .

- Mask option permits LCD driver output pins to be used for output port s.

- Segment P LA c ircuit permi ts any layout on t he LCD panel.

Built - in doubler, halv er , tripler.

•

One 6-bit tim er with programmable option clock.

•

128-byte look- up table for LCD display pat tern or 256-nibble look-up t able for gener al purpose.

•

Halt function.

•

Stop func tion.

•

Dual clock oper ation.

•

dual clock Max. 3. 58M Hz
dual clock Max. 3. 58M Hz
dual clock Max. 455KHz

slow clock only 32.768KHz

This datasheet contains new product information. Myson Technology reserves the rights to mo dify the product specification without notice.
No liability is a ssumed as a result of the use o f this product. No rights under any patent accompany the sale of the product.

1/11 MTU420 Revision 2.9 02/17/19981/11

MYSON
TECHNOLOGY

MTU420

GENERAL DESCRIPTION

The MTU420 is an LCD driv er with an embedded high- per formance 4-bit micr oc omputer. It contains all the
necessary functions in a single chip: dual clock, 4-bit parallel processing ALU, ROM, RAM, input/ output
ports, timer, clock generator, LCD driver, look-up tabl e and watchdog timer . The set of 118 instructi ons
includes not only 4-bit oper ation and manipulation instruct ion but also various conditional branch
instructions, and LCD driver data t r ansfer instruc tions that are powerful and easy to follow. T he halt function
stops internal operations other than the oscillator, divider and LCD driver in order to minimize power
dissipation. The stop function stops all c locks in the c hip.

BLOCK DIAGRAM

I/O

A1~4

DIRECTION

I/O

B1~4

BI-

I/O PORT

P1~4

OUTPUT

PORT

S1~4 M1~4 COM1~6

LIGHT

ALARM

INPUT

PORT

26 SEGMENTS

VDD1 VDD2 VDD3

LCD DRIVE

SEGMENT PLA

XTOUT

CFOUT

CUP1
CUP2

XTIN

CFIN

OSC

CKT

WAIT CNT

T1

SCG

PREDIVIDER

WATCHDOG

TIMER

T2
T3
T4

AC

DAA

ALU

6-BIT

PRESET

TIMER

CONTROL

CIRCUIT

RES INT

LOOK-UP

TABLE

128x8

11-BIT PC

STACK 8

LEVELS

INDEX

BUFFER

RAM

(128x4)

INSTRUCTION

DECODE

ROM (2048x16)

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MTU420 Revision 2.9 02/17/1998

MYSON
TECHNOLOGY

1.0 CONNECTION DIAGRAM

30

40 6050

2.0 PIN ASSIGNMENT

MTU420

1020

Pad No. 1

69

Pin
No.

10 IOA2 3599.5 2770.5 34 CFIN 154.5 980.5 58 SEG20
11 IOA3 3439.5 2770.5 35 CFOUT 154.5 1140.5 59 SEG21 3312.5 125.5
12 IAO4 3279.5 2770.5 36 COM1 133 730.5 60 SEG22 3472.5 125.5
13 IOB1 3119.5 2770.5 37 COM2 133 570.5 61 SEG23 3632.5 125.5
14 IOB2 2959.5 2770.5 38 COM3 133 410.5 62 SEG24 3792.5 125.5
15 IOB3 2799.5 2770.5 39 SEG1 112.5 125.5 63 SEG25 3952.5 125.5
16 IOB4 2639.5 2770.5 40 SEG2 272.5 125.5 64 SEG26 4112.5 225.5
17 RES 2479.5 2770.5 41 SEG3 432.5 125.5 65 COM4 4092 461
18 INT 1862.5 2770.5 42 SEG4 592.5 125.5 66 COM5 4092 621
19 P1 1702.5 2770.5 43 SEG5 752.5 125.5 67 COM6 4092 781
20 P2 1542.5 2770.5 44 SEG6 912.5 125.5 68 VDD3 4127 981
21 P3 1382.5 2770.5 45 SEG7
22 P4 1222.5 2770.5 46 SEG8 1232.5 125.5
23 M1
24 M2 902.5 2770.5 48 SEG10 1552.5 125.5

*Note: The substrate of die must connect to GND.

Pin

NameX(um)Y(um)

1 VDD 4127 1311 25 M3 742.5 2770.5 49 SEG11 1712.5 125.5
2 VDD1 4110.5 1471 26 M4 582.5 2770.5 50 SEG12 1872.5 125.5
3 VDDO 4110.5 1631 27 TESTA 422.5 2770.5 51 SEG13 2032.5 125.5
4 VDD2 4078 1791 28 CUP1 109 2757 52 SEG14 2192.5 125.5
5 ALM 4127 2142.5 29 CUP2 109 2190 53 SEG15 2352.5 125.5
6 LIGHT 4127 2440.5 30 S2 154.5 1891 54 SEG16 2512.5 125.5
7 S4 4079.5 2700.5 31 S1 154.5
8 S3 3919.5 2770.5 32 XTIN 154.5 1460.5 56 SEG18 2832.5 125.5
9 IOA1 3759.5 2770.5 33 XTOUT 154.5 1300.5 57 SEG19 2992.5 125.5

1062.5

2770.5 47 SEG9 1392.5 125.5

Pin
No.

Pin

NameX(um)Y(um)

1072.5

Pin
No.

1725.5

125.5 69 GND 4127 1151

55 SEG17 2672.5 125.5

Pin

NameX(um)Y(um)

3152.5

125.5

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MTU420 Revision 2.9 02/17/1998

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TECHNOLOGY

3.0 PIN DESCRIPTIONS

Name Type Description

XTIN

XTOUT

CFIN I - System clock oscillation.

CFOUT O - Connected with ceramic resonator or crystal oscillator.

S1 - 4 I - Input port.

M1 - 4 I - Input port.

IOA1-4 I/O - Input/ Output port.

IOB1-4 I/O - Input/ Output port.

P1 - 4 O - Output port.

INT I - Input port.

VDD - Positive supply voltage.

LIGHT O - Output port.

ALM O - Out put port.

RES I - Input pin from LSI r eset r equest si gnal.

GND - Negative supply voltage.
VDD3
VDD2
VDD1

I

- Time-based counter frequency (cl oc k specified, LCD alter nating frequency,

O

alarm signal frequency) or system cl ock oscillation.

- 32KHz crystal oscillator.

- Oscillation stops at the execution of stop instruction.

- Connected with RC oscillation circuit.

- Oscillation stops at the execution of stop or SLOW instruction.

- Input pins for data storage into RAM area (wit h c hattering pr evention).

- Internal c hattering pr evention circ uit (32m s, 8ms, 2ms selectable by
applicat ion program ) .

- Internal pull-down resistor (sel ec table by applicati on pr ogr am).

- Internal " L"-level logic holds Tr ( sel ec table by mask option).

Note: The chat tering prevention circuit param eters, 32ms, 8ms and 2ms, apply

to the 32.768KHz fundam ental f r equenc y input m ode.

- Input pins for data storage into RAM area.

- Internal c hattering pr evention circ uit (32m s, 8ms, 2ms selectable by
applicat ion program ) .

- Internal pull-down resistor (sel ec table by applicati on pr ogr am).

- Internal " L"-level logic holds Tr ( sel ec table by mask option).

Note: The chat tering prevention circuit param eters, 32ms, 8ms and 2ms, apply

to the 32.768KHz fundam ental f r equenc y input m ode.

- Input pins for data storage into the RAM area.

- Output pin for data reading from t he RA M ar ea.

- Input pins for data storage into the RAM area.

- Output pin for data reading from t he RA M ar ea.

- Output pin for data output from t he RA M ar ea.

- Input pin for external request si gnal.

- Interrupt detection si gnal edge selecti on by mask option: falling edge and
rising edge.

- Internal pull-down and pull-up resistor (selectable by mask option).

Note: When using Li version, a capacit or must be connected acr oss GND and

VDD to prevent the logic unit from malfunctioning.

- Output alarm signal: modulated signal s with a frequency of 4kHz, 2k Hz or
1kHz. In this case, these modul ated frequencies are generated and then
outputted i f the fundament al fr equenc y is 32.768kHz.

- Internal pull-down resistor.

- LCD drive voltage.

MTU420

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MTU420 Revision 2.9 02/17/1998

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TECHNOLOGY

Name Type Description

VDDO - Positive supply vol tage.

* For Ag version, apply positive supply vol tage to VDD1. F or other than Ag

versi on, apply posit iv e suppl y voltage to VDD2.

CUP1 - 2 O - S witching pins for supplyi ng the LCD driving voltage to the VDD1 and

VDD2 pins.

- Connect the CUP1 and CUP2 pins with the nonpolar ized elect r olyti c c apac itor
if 1/2 or 1/3 bias mode has been selected.

- In the static mode, these pins should be lef t open.

COM1 - 6 O - Output pins f or suppl y ing voltage to dr ive the common pins of the LCD panel.

- Frequency can be doubled or quadrupled wit h P LA .

SEG1 - 26 O - Output pins for LCD panel segm ents.

* Also used as output ports with m ask opt ion.

TESTA * - Test signal input pin.

MTU420

4.0 ABS OLUTE MAXIMUM RATINGS

at GND = 0V

Name Symbol Condition Range Unit

VDD1 -0.3 to 5.5 V

Maximum S upply Volt age

Maximum Input Volt age Vin1 -0.3 to VDDO+0.3 V
Maximum Output Voltage
Maximum Operating

Temperature
Maximum Storage
Temperature

VDD2 -0.3 to 5.5 V
VDD3 -0.3 to 8.5 V

VDDO -0.3 to 5.5 V

Vout1 out put port -0.3 to VDDO+0.3 V
Vout2 LCD segm ent driver -0.3 to VDD3+ 0.3 V

Topg 0 to +70

Tstg -25 to +125

o
o

C
C

5.0 ALLOWABLE OPERATING CONDITIONS

at Ta = 0 to 70oC, GND = 0V

Name Symb. Condition Min. Max. Unit

VDD1 1.5 5.25 V

Supply Vol tage

Oscillator Start-Up
Voltage
Oscillator Sustain
Voltage
Supply Vol tage VDD1 Ag Mode 1.2 1.65 V
Supply Vol tage VDD2 EXT-V, Li 2.4 5.25 V
Input "H" Voltage Vih1 VDD1-0.7 VDD1+0.7 V
Input "L" Voltage Vil1
Input "H" Voltage Vih2 Li Battery M ode V DD2- 0.7 VDD2+0.7 V

VDD2 3.5 5.25 V
VDD3 3.5 8.0 V

VDDO

VDD1 1.2 5.25 V
VDD2 2.4 5.25 VSupply Vol tage
VDD3

VDD Crystal Mode 1.3 V
VDD Crystal Mode 1.2 V

External RC Mode

1.5 5.25 V

Crystal Mode

2.4 8.0 V

Ag Battery Mode

-0.7 0.7 V

MTU420 Revision 2.9 02/17/1998

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TECHNOLOGY

Input "L" Voltage Vil2 -0.7 +0.7 V
Input "H" Voltage Vih3 0.8 x VDD1 VDD1 V
Input "L" Voltage Vil3
Input "H" Voltage Vih4 0.8 x VDD2 VDD2 V
Input "L" Voltage Vil4
Input "H" Voltage Vih5 0.8 x VDD2 VDD2 V
Input "L" Voltage Vil5
Input "H" Voltage Vih6 0.8 x VDDO VDDO V
Input "L" Voltage Vil6

Fopg1 Crystal M ode 32 3580 KHz
Fopg2 External RC Mode 32 1000 KHzOperating Freq.
Fopg3 CF Mode 1000 3580 KHz

OSCIN & Ag Battery
Mode

OSCIN & Li B attery
Mode

CFIN at Li Battery or
EXT-V Mode

RC Mode

0 0.2 x VDD1 V
0 0.2 x VDD2 V
0 0.2 x VDD2 V
0 0.2 x VDDO V

MTU420

6.0 ELECTRICAL CHARACTERISTICS

6.1 Input Resistance

at #1: VDD1 = 1.2V (Ag); #2: VDD2 = 2.4V (Li); #3: VDD2 = 4V (ExtV).

Name Symb. Condition Min. Typ. Max. Unit

Rllh1 Vi = 0.2VDD1, #1 10 50 200 Kohm
Rllh2 Vi = 0.2VDD2, #2 10 40 100 Kohm"L"-Level Hold Tr

Rllh3 Vi = 0.2VDD2, #3 5 20 50 Kohm
Rmsd1 Vi = VDD1, #1 200 700 2000 Kohm
Rmsd2 Vi = VDD2, #2 200 500 1000 KohmM/S Pull-Down Tr
Rmsd3 Vi = VDD2, #3 100 250 500 Kohm

Rintu1 Vi = VDD1, #1 200 700 2000 Kohm
Rintu2 Vi = VDD2, #2 200 500 1000 KohmINT Pull-Up Tr
Rintu3 Vi = VDD2, #3 100 250 500 K ohm
Rintd1 Vi = GND, #1 200 700 2000 Kohm
Rintd2 Vi = GND, #2 200 500 1000 KohmINT Pull-Down Tr
Rintd3 Vi = GND, #3 100 250 500 Kohm

Rres1 Vi = GND or VDD1, #1 5 20 50 Kohm
Rres2 Vi = GND or VDD2, #2 5 20 50 KohmRES Pull-Down R
Rres3 Vi = GND or VDD2, #3 5 20 50 Kohm

6.2 DC Outp ut Characterist ics

at #1: VDD1 = 1.2V (Ag); #2: VDD2 = 2.4V ( Li); #3: V DD2 = 4V (Ex tV).

Name Symb. Condition Port Min. T yp. Max. Unit

Voh1a Ioh = -200uA, #1 -0.5 -0.3 -0.1 V
Voh2a Ioh = -1m A , #2 -1 -0.6 -0.3 VOutput "H" V oltage
Voh3a Ioh = -3m A , #3 -1.5 -1.0 -0.5 V

Vol1a Iol = 400uA, #1 -1.1 -0.9 -0.7 V
Vol2a I ol = 2mA, #2 -2.1 -1.8 -1.4 VOutput "L" Voltage

Vol3a Iol = 6mA, #3
Voh1b Ioh = -100uA, #1 -0.5 -0.3 -0.1 V
Voh2b Ioh = -500uA, #2 -1 -0.6 -0.3 VOutput "H" V oltage
Voh3b Ioh = -1.5mA, #3 -1.5 -1.0 -0.5 V

Vol1b Iol = 200uA, #1 -1.1 -0.9 -0.7 V

Vol2b I ol = 1mA, #2 -2.1 -1.8 -1.4 VOutput "L" Voltage

Vol3b Iol = 3mA, #3

6/11

Alarm

Light

-3.5 -3.0 -2.5 V

P-port
IOA-n
IOB-n

-3.5 -3.0 -2.5 V

MTU420 Revision 2.9 02/17/1998

MYSON
TECHNOLOGY

6.3 Segment Driver Outp ut Characteristics

at #1: VDD1 = 1.2V (Ag); #2: VDD2 = 2.4V ( Li); #3: V DD2 = 4V (Ex tV).

Name Symb. Condition for Min. T yp. Max. Unit

CMOS Output Mode

Output "H" V oltage

Output "L" V oltage

Output "H" V oltage

Output "L" V oltage

Output "H" V oltage

Output "L" V oltage

Output "H" V oltage

Output "L" V oltage

Output "H" V oltage

Output "M" Voltage

Output "L" V oltage

Output "H" V oltage

Output"M1" Voltage

Output"M2" Voltage

Output "L" V oltage

Output "H" V oltage

Output"M1" Voltage

Output"M2" Voltage

Output "L" V oltage

Voh1c
Voh2c
Voh3c

Vol1c
Vol2c
Vol3c

Voh1d
Voh2d
Voh3d

Vol1d
Vol2d

Vol3d
Voh1e
Voh2e
Voh3e

Vol1e

Vol2e

Vol3e

Voh12f

Voh3f

Vol12f

Vol3f

Voh12g

Voh3g

Vom12g

Vom3g
Vol12g

Vol3g

Voh12j

Voh3j

Vom12j
Vom13j
Vom22j
Vom23j

Vol2j

Vol3j
Voh2k
Voh3k

Vom12k
Vom13k
Vom22k
Vom23k

Vol2k

Ioh = -10uA, #1
Ioh = -50uA, #2
Ioh = -200uA, #3
Iol = 20uA , #1
Iol = 100uA , #2
Iol = 400uA , #3

Static Disp lay Mode

Ioh = -1uA, #1
Ioh = -1uA, #2
Ioh = -1uA, #3
Iol = 1uA , #1
Iol = 1uA , #2
Iol = 1uA , #3
Ioh = -10uA, #1
Ioh = -10uA, #2
Ioh = -10uA, #3
Iol = 10uA , #1
Iol = 10uA , #2
Iol = 10uA , #3

1/2 Bias Display Mode

Ioh = -1uA, #1, #2
Ioh = -1uA, #3
Iol = 1uA , #1, #2
Iol = 1uA , #3
Ioh = -10uA, #1, #2
Ioh = -10uA, #3
Iol/h= +/-10uA, #1, #2
Iol/h= +/-10uA, #3
Iol = 10uA , #1
Iol = 10uA , #3

1/3 Bias Display Mode

Ioh = -1uA, #1, #2
Ioh = -1uA, #3
Iol/h= +/-10uA, #1, #2
Iol/h= +/-10uA, #3
Iol/h= +/-10uA, #1, #2
Iol/h= +/-10uA, #3
Iol = 1uA , #1,#2
Iol = 1uA , #3
Ioh = -10uA, #1,#2
Ioh = -10uA, #3
Iol/h= +/-10uA, #1, #2
Iol/h= +/-10uA, #3
Iol/h= +/-10uA, #1, #2
Iol/h= +/-10uA, #3
Iol = 10uA , #1,#2

SEG-n

SEG-n

COM-n

SEG-n

COM-n

SEGn

COMn

-0.5 -0.3 -0.1 V

-1 -0.6 -0.3 V

-1.5 -1.0 -0.5 V

-1.1 -0.9 -0.7 V

-2.1 -1.8 -1.4 V

-3.5 -3.0 -2.5 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-0.2 V

-1.4 -1.0 V

-2.2 -1.8 V

-0.2 V

-0.2 V

-1.4 -1.0 V

-2.2 -1.8 V

-2.6 -2.2 V

-4.2 -3.8 V

-0.2 V

-0.2 V

-1.4 -1.0 V

-2.2 -1.8 V

-2.6 -2.2 V

-4.2 -3.8 V

MTU420

-1.0 V

-2.2 V

-3.8 V

-1.0 V

-2.2 V

-3.8 V

-2.2 V

-3.8 V

-2.2 V

-3.8 V

-3.4 V

-5.8 V

-3.4 V

MTU420 Revision 2.9 02/17/1998

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MYSON
TECHNOLOGY

Vol3k

Iol = 10uA , #3

MTU420

-5.8 V

7.0 INSTRUCTION TABLE

Instruction Machine Code Function Flag/Remark

NOP
LCT Ly,Ry
LCB Ly,Ry
LCP Ly,Ry
OPA Rx
OPB Rx
MVH Rx
MRA Rx
MVL Rx
OPP Rx
OPPS Rx,D
INC* Rx
INC* @HL
DEC* Rx
DEC* @HL
ADC Rx
ADC @HL
ADC* Rx
ADC* @HL
SBC Rx
SBC @HL
SBC* Rx
SBC* @HL
ADD Rx
ADD @HL
ADD* Rx
ADD* @HL
SUB Rx
SUB @HL
SUB* Rx
SUB* @HL
ADN Rx
ADN @HL
ADN* Rx
ADN* @HL
AND Rx
AND @HL
AND* Rx
AND* @HL
EOR Rx

0000 0000 0000 0000
0000 000L LLLL YYYY
0000 001L LLLL YYYY
0000 010L LLLL YYYY
0000 1100 0XXX XXXX
0000 1110 0XXX XXXX
0001 1010 0XXX XXXX
0001 1010 1XXX XXXX
0001 1011 0XXX XXXX
0001 1100 0XXX XXXX
0001 1101 DXXX XXXX
0001 1110 0XXX XXXX
0001 1110 1000 0000
0001 1111 0XXX XXXX
0001 1111 1000 0000
0010 0000 0XXX XXXX
0010 0000 1000 0000
0010 0001 0XXX XXXX
0010 0001 1000 0000
0010 0010 0XXX XXXX
0010 0010 1000 0000
0010 0011 0XXX XXXX
0010 0011 1000 0000
0010 0100 0XXX XXXX
0010 0100 1000 0000
0010 0101 0XXX XXXX
0010 0101 1000 0000
0010 0110 0XXX XXXX
0010 0110 1000 0000
0010 0111 0XXX XXXX
0010 0111 1000 0000
0010 1000 0XXX XXXX
0010 1000 1000 0000
0010 1001 0XXX XXXX
0010 1001 1000 0000
0010 1010 0XXX XXXX
0010 1010 1000 0000
0010 1011 0XXX XXXX
0010 1011 1000 0000
0010 1100 0XXX XXXX

No Operation
(Ly) • (( Ry ) => decoder)
(Ly) • (( Ry ) => decoder)
(Ly) • (Rx),(AC)

Ly=0000X No Use
Ly=0000X No Use
Ly=0000X No Use

Port(IOA) • (Rx) IOA • O/P
Port(IOB) • (Rx) IOB • O/P
(@H) • (Rx)
CF • (Rx3) CF
(@L) • (Rx)
Port(P) • (Rx)
P1,2,3,4 • (Rx0)(Rx1),D,Pulse
(AC),(Rx) • (Rx)+1 CF
(AC),(@HL) • (@HL)+1 CF
(AC),(Rx) • (Rx)-1 CF
(AC),(@HL) • (@HL)-1 CF
(AC) • (Rx)+(AC)+(CF) CF
(AC) • (@ HL)+(AC)+(CF) CF
(AC),(Rx) • (Rx)+(AC)+(CF) CF
(AC),(@HL) • (@HL)+(AC)+(CF) CF
(AC) • (Rx)+(AC)B+(CF) CF
(AC) • (@ HL)+(AC)B+(CF) CF
(AC),(Rx) • (Rx)+(AC)B+(CF) CF
(AC),(@HL) • (@HL)+(AC)B+(CF) CF
(AC) • (Rx)+(AC) CF
(AC) • (@ HL)+(AC) CF
(AC),(Rx) • (Rx)+(AC) CF
(AC),(@HL) • (@HL)+(AC) CF
(AC) • (Rx)+(AC)B+1 CF
(AC) • (@ HL)+(AC)B+1 CF
(AC),(Rx) • (Rx)+(AC)B+1 CF
(AC),(@HL) • (@HL)+(AC)B+1 CF
(AC) • (Rx)+(AC)
(AC) • (@ HL)+(AC)
(AC),(Rx) • (Rx)+(AC)
(AC),(@HL) • (@HL)+(AC)
(AC) • (Rx) AND (AC)
(AC) • (@ HL) AND (AC)
(AC),(Rx) • (Rx) AND (AC)
(AC),(@HL) • (@HL) AND (AC)
(AC) • (Rx) EOR (AC)

8/11

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MTU420

Instruction Machine Code Function Flag/Remark

EOR @HL
EOR* Rx
EOR* @HL
OR Rx
OR @HL
OR* Rx
OR* @HL
ADCI Ry,D
ADCI* Ry,D
SBCI Ry,D
SBCI* Ry,D
ADDI Ry,D
ADDI* Ry,D
SUBI Ry,D
SUBI* Ry,D
ADNI Ry,D
ADNI* Ry,D
ANDI Ry,D
ANDI* Ry,D
EORI Ry,D
EORI* Ry,D
ORI Ry,D
ORI* Ry,D
IPS Rx
MSD Rx
IPM Rx
IPA Rx
IPA* Rx
IPB Rx
IPB* Rx
MSB Rx

0010 1100 1000 0000
0010 1101 0XXX XXXX
0010 1101 1000 0000
0010 1110 0XXX XXXX
0010 1110 1000 0000
0010 1111 0XXX XXXX
0010 1111 1000 0000
0011 0000 DDDD YYYY
0011 0001 DDDD YYYY
0011 0010 DDDD YYYY
0011 0011 DDDD YYYY
0011 0100 DDDD YYYY
0011 0101 DDDD YYYY
0011 0110 DDDD YYYY
0011 0111 DDDD YYYY
0011 1000 DDDD YYYY
0011 1001 DDDD YYYY
0011 1010 DDDD YYYY
0011 1011 DDDD YYYY
0011 1100 DDDD YYYY
0011 1101 DDDD YYYY
0011 1110 DDDD YYYY
0011 1111 DDDD YYYY
0100 0000 0XXX XXXX
0100 0000 1XXX XXXX
0100 0001 0XXX XXXX
0100 0010 0XXX XXXX
0100 0010 1XXX XXXX
0100 0011 0XXX XXXX
0100 0011 1XXX XXXX
0100 0100 0XXX XXXX

(AC) • (@ HL) EOR (AC)
(AC),(Rx) • (Rx) EOR (AC)
(AC),(@HL) • (@HL) EOR (AC)
(AC) • (Rx) OR (AC)
(AC) • (@ HL) OR (AC)
(AC),(Rx) • (Rx) OR (AC)
(AC),(@HL) • (@HL) OR (AC)
(AC) • (Ry)+ D+(CF) CF
(AC),(Ry) • (Ry)+D+(CF) CF
(AC) • (Ry)+ (D)B+(CF) CF
(AC),(Ry) • (Ry)+(D)B+(CF) CF
(AC) • (Ry)+ D CF
(AC),(Ry) • (Ry)+D CF
(AC) • (Ry)+ (D)B+1 CF
(AC),(Ry) • (Ry)+(D)B+1 CF
(AC) • (Ry)+ D
(AC),(Ry) • (Ry)+D
(AC) • (Ry) AND D
(AC),(Ry) • (Ry) AND D
(AC) • (Ry) EOR D
(AC),(Ry) • (Ry) EOR D
(AC) • (Ry) OR D
(AC),(Ry) • (Ry) OR D
(AC),(Rx) • Port(S)
(AC),(Rx) • WDF, CSF
(AC),(Rx) • Port(M)
(AC),(Rx) • Port(IOA)
(AC),(Rx) • Port(IOA) IOA • I/P
(AC),(Rx) • Port(IOB)
(AC),(Rx) • Port(IOB) IOB • I/P
(AC),(Rx) • STS2 B0: BCF

B1: SCF1(MPT)
B2: SCF2(HRF)

B3: SCF3(SPT)
STA Rx
STA @HL
SR0 Rx

SR1 Rx
SL0 Rx
SL1 Rx
LDS Rx,D

LDH

Rx,@HL

DAA

0100 0101 0XXX XXXX
0100 0101 1000 0000
0100 0110 0XXX XXXX

0100 0110 1XXX XXXX

0100 0111 0XXX XXXX

0100 0111 1XXX XXXX

0100 1DDD DXXX XXXX
0101 0000 0XXX XXXX
0101 0100 0000 0000

(Rx) • (AC)
(@HL) • (AC)
ACn, Rxn
AC3, Rx3
ACn, Rxn
AC3, Rx3
ACn, Rxn
AC0, Rx0
ACn, Rxn
AC0, Rx0

• Rx(n+1)

• 0

• Rx(n+1)

• 1

• Rx(n-1)

• 0

• Rx(n-1)

• 1
(AC),(Rx) • D
(Rx) • H(T@HL)
(AC) • BCD(AC) CF

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MTU420 Revision 2.9 02/17/1998

MYSON
TECHNOLOGY

MTU420

Instruction Machine Code Function Flag/Remark

DAA* Rx
DAA* @HL
LDL

Rx,@HL

DAS
DAS* Rx
DAS* @HL
MSC Rx

0101 0110 0XXX XXXX
0101 0111 0000 0000
0101 1000 0XXX XXXX
0101 1100 0000 0000
0101 1110 0XXX XXXX
0101 1111 0000 0000
0110 0000 0XXX XXXX

(AC),(Rx) • BCD(AC) CF
(AC),(@HL) • BCD(AC) CF
(Ry) • L(T@HL)
(AC) • BCD(AC) CF
(AC),(Rx) • BCD(AC) CF
(AC),(@HL) • BCD(AC) CF
(AC),(Rx) • STS3 B0: SCF4(INT)

B1: SCF5(TMR)
B2: PH15
B3: SCF7(PDV)

MAF Rx

0110 0010 0XXX XXXX

(AC),(Rx) • STS1 TF2: AC=0

TF3: CF
LDA Rx
LDA @HL
MRW Ry,Rx
MWR Rx,Ry
JB0 X
JB1 X
JB2 X
JB3 X
JNZ X
JNC X
JZ X
JC X
JMP X
CALL X

RTS

0110 1110 1XXX XXXX
0110 1111 1000 0000
0111 0YYY YXXX XXXX
0111 1YYY YXXX XXXX
1000 0XXX XXXX XXXX
1000 1XXX XXXX XXXX
1001 0XXX XXXX XXXX
1001 1XXX XXXX XXXX
1010 0XXX XXXX XXXX
1010 1XXX XXXX XXXX
1011 0XXX XXXX XXXX
1011 1XXX XXXX XXXX
1100 0XXX XXXX XXXX
1100 1XXX XXXX XXXX

1101 0000 0000 0000

(AC) • (Rx)
(AC) • (HL)
(AC),(Ry) • (Rx)
(AC),(Rx) • (Ry)
(PC) • X if (AC0) = 1
(PC) • X if (AC1) = 1
(PC) • X if (AC2) = 1
(PC) • X if (AC3) = 1
(PC) • X

if (AC) ≠ 0

(PC) • X if (CF) = 0
(PC) • X if (AC) = 0
(PC) • X if (CF) = 1
(PC) • X
(STACK)
(PC)

• (PC)+1

• X
(PC) • (ST ACK) CALL Return
(PC)
(AC)
CF

• (STACK)

• (ACR)

• CFR

INT Return
CF

S10

SCC S,X

1101 0010 0000 SXXX

Port select S port M port

X2,X1,X0 1 0 0 0 1 0 0 0 1

Port(M)-CK PH6 PH8 PH10
LCD
SMS X

FAST
SLOW

Ly,@HL

1101 100L LLLL 0000
1110 0000 000X XXXX

1110 0010 0000 0000
1110 0011 0000 0000

Ly • ((T@HL) = > decoder) Ly=000- No Use
SEF4
SEF0-3

• X4

• X0-3

M1-4 Enable

S1-4 Enable
SCLK --> HIGH SPEED CLOCK
SCLK --> LOW SPEED CLOCK
TIMER • X0-5

1110 010C CCXX XXXX

C2,C1,C0 1 0 0 0 1 0 0 0 1TMS C,X
Timer-CK PH15 PH9 PH3

10/11

MTU420 Revision 2.9 02/17/1998

MYSON
TECHNOLOGY

Instruction Machine Code Function Flag/Remark

SF X

RF X

ALM X

SIE X
SIE* X

PLC X

SRE X

HALT
STOP

1110 1000 0XXX XXXX

1110 1100 0XXX XXXX

1110 111X XXXX XXXX

1111 0000 XXXX XXXX

1111 0100 0000 XXXX
1111 100X XXXX XXXX

1111 0110 000X XXXX

1111 1100 0000 0000
1111 1111 1111 1111

X6
X5
X4
X3
X2
X1
X0
X6
X5
X4
X2
X1
X0

X8,X7,X6 1 0 0 X 1 0 X 1 1 X 1 1 0 0 0

Signal DC 1 1K 2K 4K DC 0
Xn = 1X5X4X3X2X1X0
Signal 1 Hz 2 Hz 4Hz 8Hz 16Hz 32Hz

X5-7
X0-3
X0-3 : IEF 0- 3 is Enabled
X0-3
X8

X0
X1
X2
X3
X4

: M-PORT Pull-Low
: S-PORT Pull-Low
: WDOG Set
: HALT After Li ght
: LIGHT ON
: BCF Set
: CF Set
: M-PORT Low-L-H
: S-PORT Low-L-H
: WDOG Reset
: LIGHT OFF
: BCF Reset
: CF Reset

: HEF1-3 i s Enabled
: IEF0-3 is Enabled

: Reset HRF0-3
: Reset PH11-15

: SEF1 i s Enabled
: SEF2 i s Enabled
: SEF3 i s Enabled
: SEF4 i s Enabled
: SEF5 i s Enabled

MTU420

WDOG

BCF
CF

WDOG
BCF

CF

Symbol Description

AC : Accumulator PC : Program Counter
ACn : Accumulator Bi t N X : Address
Rx : Memory of Address X CF : Carry Flag
Rxn : Memory Bit N of Address X BCF : Backup Fl ag
Ry : Memory of Wor k ing Register Y IEFn : Interrupt Enabl e Flag
HL : Index Register HEFn : HALT Release Enable Flag
@HL : Memory of Index Addr ess HRFn : HA LT Release Flag
Tx : Data of Look-up Table SEFn : Switch Enable F lag
D : Imm ediate Data SCFn : Start Condition F lag
Lx : LCD Latc h SREn : Stop Release Enable Flag
() : Cont ent of Register ()B : Complement Dat a of Register

@HL

H(T
WDF : Watchdog Enable Flag CSF : Clock Sour c e Flag

): High Ni bble of Table ROM L(T

@HL

): Low Nibble of Table ROM

11/11

MTU420 Revision 2.9 02/17/1998