ROHM RCM2122R Datasheet

Liquid Crystal Displays

16 character × 1 line COG module

RCM2122R

RCM2122R is LCD module which controller / driver LSI built in.
For display of 16 character × 1 line type reflective TN type LCD module.

Applications

!

Printer, Copy machine, Facsimile, Telephone, etc

Features

!

(1) Wide viewing angle, high contrast ratio.
(2) The dot construction is 5 × 7 dot plus 1 line.
(3) Can be interfaced with 4bit or 8bit MPU.
(4) Can display 190 different types of JIS character and symbols.
(5) With built-in character generator RAM, any user-design pattern can be displayed.
(6) Display clear, cursor ON / OFF, displayed character blink etc,

various function instruction can be accomplished simply.
(7) Compact light weight type, which can be assembled to a machine easily.
(8) Can drive by a 5V circuit.
(9) Low power consumption.

RCM2122R

External dimensions

!!!!

(Units : mm)

0.3Max.

4.79±0.3

(16.7)7.0±0.3

13.35Max.

16.35Max.

23.7±0.3

Over-coating regin

4.3±0.3

50±1.3

1Max.

3.35Min.

0.35Min.

(P1.0×13)13±0.1

3Max.

14−0.7±0.1

0.5±0.5

0.5±0.5

(6.7) (8.55)

1

(7.8)

15±0.3

60.2±0.3

57.2Min.
(50.62)

(9.8)

1

2

14

φ1.5φ1.2

36.6±1.3

(1.2)

0.5±0.5

0.5±0.5

2.75±0.3

5.2

0.580.08

1.1±0.1 1.1±0.1

0.5±0.5

0.5±0.5

1.5Max.

0.3±0.05

2.62 0.58

0.080.46

0.5±0.5

7.5±0.5

Terminal side

Dot detail

3Max.

6.14±0.3(5.2)

13.7Min.

(9)

(11)

Liquid Crystal Displays

Block diagram

!!!!

RCM2122R

Pin functions

!!!!

Pin No.

DD RAM Address

!!!!

Symbol Pin No. Symbol
1
2
3
4
5
6
7

DB7 8 DB0
DB6 9 E
DB5 10 R / W
DB4 11 R
DB3
DB2 13 V
DB1 14 V

DB0

DB7

R / W

V
V

∼

E

RS

O

V

DD
SS

12

8

S

V

O

DD

SS

IC1

16

40 40

LCD

(1) Addressing mode 1 (A=0)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 (Display position)

001 Line 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E

DD RAM ADDRESS
(16H)

(2) Addressing mode 2 (A=1)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 (Display position)

001Line 01 02 03 04 05 06 07 40 41 42 43 44 45 46

DD RAM ADDRESS
(16H)

Note) The above shows the addresses when the display off is not conducted.

0F

47

Liquid Crystal Displays

Power supply sample connect

!!!!

V

DD

LCD MODULE

O

V

V

SS

VDD−V

RCM2122R

O

V

VR : 10kΩ

DD

(Note)

As operating voltage, (V
Optimum operating voltage changes by viewing angle and temperature.
Contrast can be changed by adjustment of V
at most suitable condition by each operating situation.
When you fix the V

Absolute maximum ratings

!!!!

Parameter
Supply voltage for logics
Supply voltage for driving LCD
Input voltage
Operating temperature rang
Storage temperature rang

Electrical characteristics

!!!!

Parameter
Supply voltage for logics
Operating voltage
Input "H" level voltage (1)
Input "L" level voltage (1)
Input "H" level voltage (2)
Input "L" level voltage (2)
Output "H" level voltage
Output "L" level voltage
Power supply current

Fig.1

DD-VO

)V is charged to LCD.

O

, so please use LCD module

O

, please check using by actual set.

(Ta=25°C)

Symbol

DD-VSS

V

VDD-V

V

IN

Topr
Tstg

Min.

−0.3

O

−0.3

−0.3

−20

(VDD=5.0±5%, Ta=25°C)

Symbol

V

DD

V

DD−VO

V

IH1

V

IL1

V

IH2

V

IL2

V

OH

V

OL

I

DD

0.8V

0

Min.

4.75

3.0

2.3
0

0

2.4

−

−

Max.

6.0

6.0

DD

+0.3

V

50
70

Typ.

5.0

DD

1.4

Unit

V
V

V
˚C
˚C

Max.

5.25

−

−

−

−

−

−

−

V
V

0.8

V

0.2V

0.4

DD

DD

DD

−

3.6

Unit

Conditions
V
V
V

All terminals except E terminal

V
V

DD

mA

V
V
V

E

IOH=−0.205mA
IOL=1.6mA

DD

=5.0V, fosc=270kHz

V

Optical characteristics

!!!!

Parameter
Rise time
Decay time
Contrast ratio

Viewing angle

(Ta=25°C)

Symbol

Min.

t

r

t

d

K

θ

1

θ

2

φ

−

−

1.4

−

40

±30

Typ.

100
150

2.0

−

−

−

Max.

200
250

−

10

−

−

Unit

ms
ms

−

deg
deg
deg

θ=

10˚, φ=0˚

θ=

10˚, φ=0˚

θ=

10˚, φ=0˚

φ

=

0˚, K≥1.4

θ=

20˚, K≥1.4

Conditions