Mitsubishi M66004SP, M66004FP Datasheet

MITSUBISHI 〈DIGITAL ASSP〉

MITSUBISHI 〈DIGITAL ASSP〉

DESCRIPTION

The M66004 is a 16-digit 5×7-segment vacuum fluorescent
display (VFD) controller using the silicon gate CMOS tech­nology.
It contains 160 ROM characters and 16 user-defined RAM
characters and receives display character codes and various
commands from MCU to control VFD.

FEATURES

• Built in 5×7-dot segment character ROM
(160 characters based on JIS-C-6220. Customization is
possible.)

• Built in character RAM for user definition (16 characters)

• Display digit length can be changed. (from 9 to 16 digits)

• One-digit display cycle setting can be changed. (2 cycles)

• Dimmer is adjustable. (8 grades)

• Cursor display ON or OFF is selectable. (SEG

35 output)

• Built in automatic display digit increment function

• Auto increment of display digit

• Built in simultaneous all-digit display ON/OFF command

• Connection to MCU by three signal lines, CS, SCK and
SDATA

• Instruction execution with one byte*

• 2 general purpose output ports

• Positive supply voltage V

• Pull-down voltage V

V

CC=5V ± 10%
P=VCC-40V typ.
CC-45V max. (peak)

*: Except for character RAM setting

APPLICATION

AV equipments, vacuum fluorescent display controller for
POS system, etc.

FUNCTION

The M66004 is a 16-digit 5×7-segment VFD (Vacuum Fluo­rescent Display) controller and contains 160 ROM characters
based on JIS-C-6220 which can be customized and 16 RAM
characters that user can define freely.
Character display codes and various commands are re­ceived as 8-bit serial data from MCU.
Main functions of this IC are display digit length setting, one­digit display cycle setting and dimmer adjustment.
It has 36 segment output pins from SEG
uses 35 pins from SEG

35 output, which is independent of other segment, is

SEG

00 to SEG34 for character display.

00 to SEG35 and

used for cursor display by inputting either cursor ON or OFF
command.
Once display data is fixed, display continues automatically
until new data is input. Therefore, MCU can execute other
jobs and is lightened of its load.
Additionally , the IC can control other I/O elements because it
contains two static operation output ports.

16-DIGIT 5X7-SEGMENT VFD CONTROLLER

16-DIGIT 5×7-SEGMENT VFD CONTROLLER



DIG11 DIG12



DIG10




DIG




DIG




DIG




Digit outputs

Reset input
Chip select input
Shift clock input
Serial data input

Output ports

Clock output
Clock input

Segment outputs

DIG



DIG




DIG




DIG




DIG




DIG01 ←11



DIG00 ←12



RESET →13

SDATA →16





SEG35 ←23




SEG34 ←24




SEG33 ←25




SEG32 ←26



SEG31 ←27




SEG30 ←28




SEG29 ←29




SEG28 ←30



SEG27 ←31



M66004SP/FP

1

←

2

←

09

3

←

08

4

←

07

5

←

06

6

←

05

7

←

04

8

←

03

9

←

02

10

CS →14

CSK →15

P1 ←17
P0 ←18

VCC1

19

XOUT ←20

XIN →21

VSS

22

VP

32

M66004SP/FP

→←

64

→
→
→

→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→

DIG
DIG
DIG

VCC2
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG

13
14
15

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

63
62
61
60
59
58
57
56
55
54
53

M66004SP/FP

52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33

Outline 64P4B

64P2G-A





Digit output





























Segment outputs




























1

BLOCK DIAGRAM

MITSUBISHI 〈DIGITAL ASSP〉

M66004SP/FP

16-DIGIT 5×7-SEGMENT VFD CONTROLLER

Chip
select input

Shift
clock input

Serial
data input

Reset
input

Clock
input

Clock
output

CS

RESET

OUT

Display code register

(8-bit × 16)

code

write
14

15SCK

16SDATA

13

21X

IN

20X

Serial

receive circuit

Clock

generator

Code /

command

control circuit

Display control

register

RAM
write

code select

Display controller

(35-bit × 160)

DecoderDecoder

(35-bit × 16)

CGROM

CGRAM

Segment

output circuit

Output port

(2 bits)

Digit

output circuit

59 SEG

33 SEG

SEG

31

23

SEG

P

0

18

P

1

17

DIG

12

DIG

1

64

DIG

61

DIG

00

26

27

35

00

11

12

15

Segment
outputs

Output
ports

Digit
outputs

OPERATION FLOW

The serial receive circuit receives 8-bit serial data, latches
the data by an internal latch signal, and then masks inputs
from the MCU.
When the code/command circuit receives a command, it sets
the display control register to the fixed state, and when it re­ceives a character code, it writes the code to one of 16 dis­play code registers which corresponds to the digit to display.
The display controller outputs digit ON/OFF timing pulse to
the digit output circuit and selects one character code to dis­play among display code registers. The selected character
code is input to either CGROM decoder or CGRAM decoder
and then converted into a 35-bit character pattern to input the
segment output circuit.

2

PIN DESCRIPTIONS

Symbol

Pin name

MITSUBISHI 〈DIGITAL ASSP〉

M66004SP/FP

16-DIGIT 5X7-SEGMENT VFD CONTROLLER

Function

RESET

CS

SCK

SDATA

XIN,
XOUT

DIG00~
DIG15

SEG00~
SEG35

P0, P1

VCC1

VCC2

VSS

VP

Reset input

Chip select
input

Shift clock
input

Serial data
input

Clock input
Clock output

Digit output

Segment
output

This pin is used to initialize the internal state of the M66004.

In “L” state, communication with the MCU is possible.
In “H” state, any instruction from the MCU is neglected.

At the rising edge from “L” to “H”, input data is shifted.

Character code or command data to display is input from MSB.

This pin is used to connect a resistor and a capacitor externally to set oscillation frequency. (maximum
oscillation frequency fosc(max)=1MHz) An external clock can be also connected. In this case, an external
clock is connected to pin XIN, and pin XOUT is set to be in open state.

These pins are used to connect to digit pins of VFD. Pins from DIG00 to DIG15 correspond to digits of VFD
from the first digit to the 16th digit.

These pins are used to connect to segment pins of VFD. Pins from SEG00 to SEG35 correspond to segment
pins of VFD as shown in the table below.

Output port (static operation)

Positive power supply for internal logic

Positive power supply for high-pressure-resistant output port

GND

Negative power supply for VFD drive

(Connection of segment output pins)

Each in the table shows one-dot segment and each figure
in shows the output segment pin number (from 00 to 35) to
connect.

00 01 02 03 04

05 06 07 08 09

10 11 12 13 14

15 16 17 18 19

20 21 22 23 24

25 26 27 28 29

30 31 32 33 34

35

3

MITSUBISHI 〈DIGITAL ASSP〉

M66004SP/FP

16-DIGIT 5×7-SEGMENT VFD CONTROLLER

DATA TRANSMISSION FORMAT

The MCU transmits 8-bit serial data (MSB-first) to the
M66004. In either case of command data or character code
data, the M66004 operates by transmitting only one-byte
data.

(Transmission timing)

Standard timing

CS

SCK

SDATA D7 D6

(MSB)

However, in case of character RAM data setting, it is neces­sary to send 7-byte data continuously.

D5 D4 D1

D0

(LSB)

Continuous data transmission timing (In the following example, command data is transmitted and then character
codes are transmitted continuously.)

CS

SCK

t

SDATA Command data

BUSY

: Internal processing time

t

BUSY

Character code Character code

t

BUSY

4

COMMAND LIST

MITSUBISHI 〈DIGITAL ASSP〉

M66004SP/FP

16-DIGIT 5X7-SEGMENT VFD CONTROLLER

Function

Display digit length setting

Dimmer value setting

One-digit display frequency
setting

Display digit setting

Auto increment setting

Cursor ON

Cursor OFF

All digit display ON/OFF

D7

Command code

D0

D1

D2

D3

D4

D5

D6

The number of digits to display is fixed. Eight

0

0

1

1

1

0

1

1

0

0

0

0

1

1

1

1

1

1

0

0

0

0

1

1

0

0

1

0

0

1

*

0

0

1

*

1

*

0

0

1

*

*

*

*

1

1

*

*

0

1

*

*

*

*

*

0

types of setting (from 9 digits to 16 digits) are

*

possible.

Eight types of setting (from 1/16 to 14/16) are

*

possible for dimmer value.

Either 128/fOSC or 256/fOSC is selected as one-

*

digit display frequency.

The first character code received after

*

executing this command is displayed as
designated by this command.

This command is executed to set or cancel the

*

automatic display digit increment function.

This command is executed to make SEG35 ON.

*

This command is executed to make SEG35

*

OFF.

This command is executed to make all-digit

*

display OFF or all-digit/segment display ON.

Contents

Write to user RAM

Output port state setting

×: Optional
*: Refer to the description of command.

1

1

DESCRIPTION OF COMMAND

1. Display digit length setting

D7 D6 D5 D4 D3 D2 D1 D0

00000

Display digit length (See table 1.)

1

*

0

1

1

1

1

definition.

Output ports P0 and P1 are set or reset.

*

Character data is written into RAM for user

×

×

1

1

1

1

Table 1 Display digit length

D2

D1

D0

0

0

0

0

0

1

0

1

0

0

1

1

1

0

0

1

0

1

1

1

0

1

1

1

Display digit length

9
10
11
12
13
14
15
16

5