1/25

MSM6404A/6404VS

¡ Semiconductor

GENERAL DESCRIPTION

The MSM6404A microcontroller is a low-power device implemented in complementary metal-
oxide semiconductor technology. The MSM6404A is optimized for high-speed processing and
complicated-control applications.
The MSM6404VS is a CMOS 4-bit microcontroller that employs an external EPROM using a
piggy-back package in place of the program memory (ROM) internal to the MSM6404A.
The MSM6404VS can be used for program development verification because the programs can
be modified by programming an external EPROM 2732 equivalent or 2764A equivalent.

FEATURES

· Mask ROM (MSM6404A)

: 4000 words ¥ 8 bits

External ROM (MSM6404VS)

: 8196 words ¥ 8 bits

· RAM (including the stack area)

: 256 words ¥ 4 bits

· I/O port

Input-output port

: 8 ports ¥ 4 bits

Input port

: 1 port ¥ 4 bits

4 bits are for input ports having a latch; the other 32 bits are input/output ports that allow
bit manipulation

· Three built-in counters

: 12-bit time-base counter
12-bit programmable timer

8-bit high-speed programmable timer/event
counter

· Built-in 8-bit serial I/O register (with 3-bit counter)
· Five interrupts with five priority levels (4 internal, 1 external)
· 32 stacks (in RAM)
· Power-down features
· Minimum instruction execution time

: 952 ns @ 4.2 MHz clock

· Instruction systems suitable for control
· Fully static operation
· Low power consumption
· Single 5 V supply
· Package options:

MSM6404A

42-pin plastic DIP (DIP42-P-600-2.54)

: (Product name : MSM6404A-¥¥¥RS)

44-pin plastic QFP (QFP44-P-910-0.80-K)

: (Product name : MSM6404A-¥¥¥GS-K)

44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name : MSM6404A-¥¥¥GS-2K)

MSM6404VS

42-pin ceramic piggyback (ADIP42-C-600-2.54) : (Product name : MSM6404VS)

¥¥¥ indicates a code number.

¡ Semiconductor

MSM6404A/6404VS

High speed and High performance 4-Bit Microcontroller

E2E0013-38-93

This version: Sep. 1998

Previous version: Mar. 1996

2/25

MSM6404A/6404VS

¡ Semiconductor

BLOCK DIAGRAM

MSM6404A

3 2 1 0

RAM

16 ¥ 16 ¥ 4 bits

DEC

12-bit Timer

8-bit T/C

8-bit SR

ALU

ACC

INSTR

DEC

ROM

4000 ¥ 8 bits

Timing

Control

Interrupt

Control

PC INTE

PD IRQ

12-bit TBC

OSC

TEST
RESET

GND

INT

CIN

TMO

TCK

SCK, CTO, CLK

3/25

MSM6404A/6404VS

¡ Semiconductor

BLOCK DIAGRAM (continued)

MSM6404VS

3 2 1 0

RAM

16 ¥ 16 ¥ 4 bits

DEC

12-bit Timer

8-bit T/C

8-bit SR

ALU

ACC

INSTR

DEC

Timing

Control

Interrupt

Control

PC INTE

PD IRQ

12-bit TBC

OSC

TEST
RESET

GND

INT

CIN

TMO

TCK

SCK, CTO, CLK

to I

to A

4/25

MSM6404A/6404VS

¡ Semiconductor

PIN CONFIGURATION (TOP VIEW)

P0.3

P4.0

P4.1

P4.2

P4.3

P3.0

P3.1

P3.2

P3.3

OSC

RESET

TEST

P2.0

P2.1

P2.2

P2.3

P0.0

P0.1

P0.2

P1.1

P5.3

P5.2

P5.1

P5.0

P6.3

P6.2

P6.1

P6.0

P7.3

P7.2

P7.1

P7.0

P8.3

P8.2

P8.1

P8.0

P1.3

P1.2

GND

P1.0

42-Pin Plastic DIP

5/25

MSM6404A/6404VS

¡ Semiconductor

PIN CONFIGURATION (TOP VIEW) (continued)

NC: No-connection pin

44-Pin Plastic QFP

P3.1

P3.2

P3.3

OSC

RESET

TEST

P2.0

P2.1

P2.2

P2.3

P6.2

P6.1

P6.0

P7.3

P7.2

P7.1

P7.0

P8.3

P8.2

P8.1

P3.0

P4.3

P4.2

P4.1

P4.0

P5.3

P5.2

P5.1

P5.0

P6.3

P0.0

P0.1

P0.2

P0.3

GND

P1.0

P1.1

P1.2

P1.3

P8.0

6/25

MSM6404A/6404VS

¡ Semiconductor

P4.0

P4.1

P4.2

P4.3

P3.0

P3.1

P3.2

P3.3

OSC

RESET

TEST

P2.0/INT

P2.1

P2.2

P2.3

P0.0

P0.1/SCK

P0.2/SO

P0.3/SI

GND

P5.3

P5.2

P5.1

P5.0

P6.3

P6.2

P6.1

P6.0

P7.3

P7.2

P7.1

P7.0

P8.3

P8.2

P8.1

P8.0

P1.3

P1.2/TCK

P1.1/TMO

P1.0/CIN

wA12

eA7

rA6

tA5

yA4

uA3

iA2

oA1

!0A0

!1I0

!2I1

!3I2

!4GND

PGM/V

A8@5

A9@4

A11@3

OE/GND@2

A10@1

CE/GND@0

I6!8

I5!7

I4!6

I3!5

I7!9

PIN CONFIGURATION (TOP VIEW) (continued)

42-Pin Ceramic Piggyback

7/25

MSM6404A/6404VS

¡ Semiconductor

PIN DESCRIPTIONS

Symbol

Type

Description

During reset

P0.0

I/O

"1"

P0.1/SCK

P0.2/SO

P0.3/SI

P1.0/CIN

I/O

P1.0 is shared with counter input (CIN).

"1"

P1.1/TMO

P1.1 is shared with timer output (TMO).

P1.2/TCK

P1.3

P2.0/INT

P2.0 is shared with external interrupt input (INT).

The latch is

reset.

P2.1

Input port with a latch, built-in pull-up resistor

P2.2

P2.3

P3.0 to 3.3

"0"

P4.0 to 4.3

P5.0 to 5.3

P6.0 to 6.3

P7.0 to 7.3

I/O

"0"

P8.0 to 8.3

OSC

Oscillation

waveform

Crystal connection pins for clock oscillation

TEST

Pulse output

(Test pin for manufacturer)

RESET

Power supply voltage pins

GND

P0.1 is shared with serial clock (SCK) input/output.

P0.2 is shared with serial data (SO) output.

P0.3 is shared with serial data (SI) input.

P1.2 is shared with timer clock input (TCK).

I/O

"1"

"0"

OSC

Input pin for system reset

8-bit output ports (at OPT instruction execution)

I/O

Note: 1. The ports except for pins P2.0 to P2.3 are pseudo bidirectional ports.

2. When each port is used for output, the MSM6404A can drive one TTL (one input) and

the MSM6404VS can drive one LS TTL (one input).

Upper Pins for MSM6404VS

Symbol

Type

Description

A0 to A12

I0 to I7
CE/GND

OE/GND

Data input

Chip enable input

Output enable input

Address output

PGM/V

Program input

Power supply voltage pins

GND

Programed power supply voltage pin

8/25

MSM6404A/6404VS

¡ Semiconductor

ABSOLUTE MAXIMUM RATINGS (MSM6404A)

Parameter

Symbol

Condition

Rating

Unit

Power Supply Voltage

Ta = 25°C

0.3 to +7

Input Voltage

0.3 to V

Output Voltage

0.3 to V

Power Dissipation

200 max.

Ta = 25°C per output

50 max.

Ta = 25°C per package

Storage Temperature

STG

55 to +150

°C

RECOMMENDED OPERATING CONDITIONS (MSM6404A)

Note: Refer to the f

OSC

-V

characteristic in OPERATING CHARACTERISTICS for the

relation-ship between power supply voltage and operating frequency.

Parameter

Symbol

Condition

Range

Unit

Power Supply Voltage

OSC

£ 1 MHz

3 to 6

4.5 to 5.5

OSC

£ 4.2 MHz

Data-Hold Voltage

DDH

2 to 6

OSC

= 0 Hz

Operating Temperature

40 to +85

°C

Fan Out

MOS load

TTL load

9/25

MSM6404A/6404VS

¡ Semiconductor

ELECTRICAL CHARACTERISTICS (MSM6404A)

DC Characteristics

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

"H" Input Voltage*1, *2

2.4

"H" Input Voltage*3, *4

3.6

"L" Input Voltage

0.3

+0.8

"H" Output Voltage*1, *5

= 15 mA

4.2

= 1.6 mA

0.4

= 15 mA

0.4

Input Current*3

= V

/0 V

15/15

Input Current*2, *4

1/30

"H" Output Current*1

= 2.4 V

0.1

= 0.4 V

1.2

Input Capacitance

f = 1 MHz, Ta = 25°C

Output Capacitance

Power Supply Current

(In Stop Mode)

DDS

= 2 V, no load, Ta = 25°C

0.2

No load

100

Power Supply Current

Crystal oscillation

f = 4.194304 MHz, no load

"L" Output Voltage*1

"L" Output Voltage*5

"H" Output Current*1

= V

/0 V

= 5 V ±10%, Ta = 40 to +85°C)

*1 Applied to P0, P1, P3, P4, P5, P6, P7 and P8.
*2 Applied to P2.
*3 Applied to OSC

*4 Applied to RESET.
*5 Applied to OSC

10/25

MSM6404A/6404VS

¡ Semiconductor

AC Characteristics (MSM6404A)

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Clock (OSC

) Pulse Width

119

Cycle Time

952

Input Data Setup Time

120

Input Data Hold Time

120

SR/TM Clock Pulse Width

120

CT Clock Pulse Width

P2 Input Data Clock Pulse Width

120

= 5 V ±10%, Ta = 40 to +85°C)

SR Data Setup Time

120

SR Data Hold Time

120

Data Delay Time

= 15 pF

+ 300

Data Delay Time at Mode

Switching

DCR

= 15 pF

7/8 t

+ 300

DI1

= 15 pF

6/8 t

+ 300

2/8 t

+ 120

Data Delay Time at OPT

Instruction

CT/TM Data Delay Time Using

TBC Clock

SR/TM Data Delay Time Using

PORT Clock

CT Data Delay Time Using

PORT Clock

CT Data Delay Time Using

External Clock

SR/TM Data Delay Time Using

External Clock

SR Clock Invalid Time

INT Invalid Time

DI2

= 15 pF

7/8 t

+ 300

= 15 pF

2/8 t

+ 360

= 15 pF

+ 480

= 15 pF

10/8 t

+ 480

= 15 pF

2/8 t

+ 360

= 15 pF

360

SINH

2/8 t

IINH

1/8 t

Data Delay Time at OPT

Instruction

11/25

MSM6404A/6404VS

¡ Semiconductor

Timing Diagrams (MSM6404A)

Output Conditions

1MC

DCR

DI1

DI2

OSC

0, 1, 3
4, 5, 6

7 or 8

PA =

P0, P1, P3
P4, P5, P6
P7, P8

PA = 9 or A

P0.1
P0.2
P0.3

OPT INST.

TBC clock

P0.1
P1.1

CT
TM

P0.2 P0.1 clock* SR
P1.1 P1.2 clock* TM

P0.1 P1.0 clock* CT

P0.1 EXT clock

P1.0 P1.2 EXT clock

P0.1 CT

P0.2 SR
P1.1 TM

Output data to port is clock for SR, TM or CT.

12/25

MSM6404A/6404VS

¡ Semiconductor

Input Conditions

SINH

1MC

IINH

INPUT

DATA

INPUT

DATA

1MC

OSC

P0, P1, P2
P3, P4, P5
P6, P7, P8

P0.1 SR clock
P1.2 TM clock
P2

P1.0 CT clock

P0.1 SR clock

P0.3 SI

OSC

SINH

P0.1 (SR clock) INH period during LMSR INST.
(Note : P0.1 is used for clock of SR.)

IINH

P2.0 (interrupt) INH period during RPB and RPBD INST.

13/25

MSM6404A/6404VS

¡ Semiconductor

9 10

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

(mA)

(V)

9 10

(mA)

(V)

9 10

OSC

(MHz)

(V)

40 20 0 20 40 60 80 100120

OSC

(MHz)

Ta (°C)

9 10

(V)

100 n

1 m

10 m

100 m

1 m

10 m

(A)

2 MHz

OSC

= 4 MHz

0 Hz

= 5 V

6 V

4 V

3 V

= 6 V

5 V

4 V

3 V

100 kHz

Ta = 25°C

CL = 15 pF

Ta = 25°C, CL =1 5 pF

Ta = 25°C, no load

500 kHz

1 MHz

Operating Characteristics (MSM6404A)

Current (I

) vs Voltage (V

) for High State

Output

Current (I

) vs Voltage (V

) for Low State

Output

Maximum Clock Frequency (f

OSC

) vs

Temperature (Ta)

Supply Current (I

) vs Supply Voltage

)

Maximum Clock Frequency (f

OSC

) vs Supply

Voltage (V

)

14/25

MSM6404A/6404VS

¡ Semiconductor

ABSOLUTE MAXIMUM RATINGS (MSM6404VS)

RECOMMENDED OPERATING CONDITIONS (MSM6404VS)

Parameter

Symbol

Condition

Rating

Unit

Power Supply Voltage

Ta = 25°C

0.3 to +7

Input Voltage

0.3 to V

Output Voltage

0.3 to V

Power Dissipation

200 max.

Ta = 25°C per output

50 max.

Ta = 25°C per package

Storage Temperature

STG

55 to +150

°C

Parameter

Symbol

Condition

Range

Unit

Power Supply Voltage

OSC

£ 1 MHz

3 to 6

4.75 to 5.25

OSC

£ 4.2 MHz

Data-Hold Voltage

DDH

2 to 6

OSC

= 0 Hz

Operating Temperature

0 to +40

°C

Fan Out

MOS load

LSTTL load

15/25

MSM6404A/6404VS

¡ Semiconductor

ELECTRICAL CHARACTERISTICS (MSM6404VS)

DC Characteristics

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

"H" Input Voltage*1, *2

3.6

"H" Input Voltage*3, *4

3.6

"L" Input Voltage

0.3

+0.8

"H" Output Voltage*1, *5

= 15 mA

4.2

= 0.4 mA

0.4

= 15 mA

0.4

Input Current*3

= V

/0 V

15/15

Input Current*2, *4

1/30

"H" Output Current*1

= 2.4 V

0.1

= 0.4 V

1.2

Input Capacitance

f = 1 MHz, Ta = 25°C

Output Capacitance

Power Supply Current*6

(In Stop Mode)

DDS

= 2 V, no load, Ta = 25°C

No load

100

Power Supply Current*6

Crystal oscillation

f = 4.2 MHz, no load

"L" Output Voltage*1

"L" Output Voltage*5

"H" Output Current*1

= V

/0 V

= 5 V ±5%, Ta = 0 to +40°C)

*1 Applied to P0, P1, P3, P4, P5, P6, P7 and P8.
*2 Applied to P2.
*3 Applied to OSC

*4 Applied to RESET.
*5 Applied to OSC

*6 The EPROM current is not included.

16/25

MSM6404A/6404VS

¡ Semiconductor

AC Characteristics (MSM6404VS)

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Clock (OSC

) Pulse Width

119

Cycle Time

952

Input Data Setup Time

120

Input Data Hold Time

120

SR/TM Clock Pulse Width

120

CT Clock Pulse Width

P2 Input Data Clock Pulse Width

120

= 5 V ±5%, Ta = 0 to +40°C)

SR Data Setup Time

120

SR Data Hold Time

120

Data Delay Time

= 15 pF

+ 300

Data Delay Time at Mode

Switching

DCR

= 15 pF

7/8 t

+ 300

DI1

= 15 pF

6/8 t

+ 300

2/8 t

+ 120

Data Delay Time at OPT

Instruction

CT/TM Data Delay Time Using

TBC Clock

SR/TM Data Delay Time Using

PORT Clock

CT Data Delay Time Using

PORT Clock

CT Data Delay Time Using

External Clock

SR/TM Data Delay Time Using

External Clock

SR Clock Invalid Time

INT Invalid Time

DI2

= 15 pF

7/8 t

+ 300

= 15 pF

2/8 t

+ 360

= 15 pF

+ 480

= 15 pF

10/8 t

+ 480

= 15 pF

2/8 t

+ 360

= 15 pF

360

SINH

2/8 t

IINH

1/8 t

Data Delay Time at OPT

Instruction

17/25

MSM6404A/6404VS

¡ Semiconductor

Timing Diagrams (MSM6404VS)

Output Conditions

DCR

DI1

DI2

OSC

P0, P1, P3
P4, P5, P6
P7, P8

P0.1
P0.2
P1.1

OPT INST.

TBC clock

P0.1/CTO
P1.1/TMO

P0.2/SO
P1.1/TMO

P0.1/CTO P1.0

clock

P0.1

EXT clock

P1.0, P1.2

EXT clock

P0.1 clock
P1.2 clock

P0.1/CTO

P0.2/SO
P1.1/TMO

1MC

IINH

OSC

SINH

P0.1/SCK inhibit period during LMSR INST.

IINH

P2.0/INT inhibit period during RPB and RPBD INST.

19/25

MSM6404A/6404VS

¡ Semiconductor

Operating Characteristics (MSM6404VS)

Current (I

) vs Voltage (V

) for High State

Output

Current (I

) vs Voltage (V

) for Low State

Output

9 10

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

(mA)

(V)

9 10

(mA)

(V)

9 10

(V)

100 n

1 m

10 m

100 m

1 m

10 m

(A)

2 MHz

OSC

= 4 MHz

0 Hz

= 6 V

5 V

4 V

3 V

= 6 V

5 V

4 V

3 V

1 MHz

500 kHz

100 kHz

Ta = 25°C, excluding pins A

-A

Ta = 25°C

9 10

OSC

(MHz)

(V)

Ta = 25°C, C

= 15 pF

Ta = 25°C, no load,

excluding EPROM current

40 20 0 20 40 60 80 100120

OSC

(MHz)

Ta (°C)

= 5 V, C

= 15 pF

500 n

5 m

50 m

500 m

5 m

Maximum Clock Frequency (f

OSC

) vs Supply

Voltage (V

)

Supply Current (I

) vs Supply Voltage

)

Maximum Clock Frequency (f

OSC

) vs

Temperature (Ta)

20/25

MSM6404A/6404VS

¡ Semiconductor

FUNCTIONAL DESCRIPTION

MSM6404VS Interface to EPROM

EPROM insertion method

2732

2764A

2732 EPROM

2764A EPROM

EPROM read timing

ACC

Read Data

Address

1MC

0 to

OSC

CE, OE

Use EPROM with t

ACC

of less than 357 ns.

Read data is read into the instruction register in the first half of the T1 state.

21/25

MSM6404A/6404VS

¡ Semiconductor

Differences between MSM6404A and MSM6404VS (PIGGYBACK)

Item

MSM6404A

MSM6404VS (Piggyback)

Ports P0, 1, 3 are set to "1" and ports P2, 4,

5, 6, 7, 8 are reset to "0" directly by the reset

input signal.

Ports P0, 1, 3 are set to "1" and ports P2, 4,

5, 6, 7, 8 are initialized during reset cycle.

After being reset, the timer continues to stop

until data is set in it.

It is undefined whether the timer starts or

not after being reset. Therefore, the timer

should be initialized by software.

Serial out F/F (SOF/F) is set to "0" after being

reset.

It is undefined whether serial out F/F

(SOF/F) is "0" or "1" after being reset.

Therefore the serial out F/F should be

initialized by software.

Port

initialization

during reset

2. Timer

operation

3. Shift register

Internal clock

Port

input/output

timing

Input

Data are input

at this time.

Input

Data are input

at this time.

Internal clock

Synchronized
with falling edge

Data are output
at this time.

Output

TTL FO = "1"

= 1.6 mA @ 0.4 V)

LSTTL FO = "1"

= 0.4 mA @ 0.4 V)

Port

input/output

characteristics

P2.0-3

TTL compatible input

CMOS input

P0.0-P8.3

(Except P2.0-3)

Up to 4 Kbytes

Up to 8 Kbytes accessible

Available ROM

capacity

Not available

Available

LJP a

, LCAL a

instruction

Internal clock

Output

23/25

MSM6404A/6404VS

¡ Semiconductor

(Unit : mm)

Notes for Mounting the Surface Mount Type Package

The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which
are very susceptible to heat in reflow mounting and humidity absorbed in storage.
Therefore, before you perform reflow mounting, contact Oki's responsible sales person for the
product name, package name, pin number, package code and desired mounting conditions
(reflow method, temperature and times).

QFP44-P-910-0.80-K

Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)

Epoxy resin
42 alloy
Solder plating
5 mm or more
0.35 TYP.

Mirror finish

24/25

MSM6404A/6404VS

¡ Semiconductor

(Unit : mm)

Notes for Mounting the Surface Mount Type Package

Package material
Lead frame material
Pin treatment
Solder plate thickness

Package weight (g)

Epoxy resin
42 alloy
Solder plating
5 mm or more

0.41 TYP.

QFP44-P-910-0.80-2K

Mirror finish

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MSM6404A

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MSM6404A