Datasheet RCM2122R Datasheet (ROHM)

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

(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

2.75±0.3

5.2

0.580.08

1.1±0.1 1.1±0.1

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

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

−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

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

−

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

Liquid Crystal Displays

RCM2122R

(1) Difinition of θ and φ

Viewing direction (12:00)

Y [ φ=180° ]

θ

Fig.2

(3) Difinition of contrast ratio K

Selected

100

Brightness (%)

0

Driving voltage

Fig.4

Z [ θ=0˚ ]

2'

θ

1'

θ

B

(2) Difinition of viewing angle θ1 and θ2

θ

2

1

XX'

Y' [ θ=0˚ ]

Viewing direction (6:00)

1.4

Contrast ratio

θ

1

Viewing angle

θ

2

Fig.3

(4) Difinition of optical response time

K=B

2

/ B

1

B

2

Non-selected

1

90%

t

r

100%

Rise time

Selected condition

Fig.5

10%

t

d

Decay time

Timing characteristics

!!!!

(1) Writing (V

DD

=5V±5%, VSS=0V, Ta=0∼+50°C)

Parameter

Enable cycle time

Enable pulse time

Enable rise time / decay time Set-up time Address hold time Data set-up time Data hold time

"H" level "L" level

RS, R / W, E

RS

R / W

E

DB0∼DB7

V

IL1

V

Symbol

t

PW

tEr,t

t

V

IL1

V

t

Er

CYCE

t

AS

t

AH

DSW

t

H

IH1

t

AS

IL2

Min.

500

EH

EL

Ef

220 280

−

40 10 60 10

PW

EH

V

IH2

V

IH1

V

IL1

t

DSW

Valid data

V

IH2

V

t

CYCE

Max.

−

20

−

V

IH1

V

IL1

t

AH

V

IL1

t

AH

t

Ef

PW

EL

IL2

t

H

V V

V

IL2

IH1 IL1

Unit

ns ns ns ns ns ns ns ns

Fig.6 Fig.6 Fig.6 Fig.6 Fig.6 Fig.6 Fig.6 Fig.6

Fig.6

Liquid Crystal Displays

(2) Reading (VDD=5V±5%, VSS=0V, Ta=0∼+50°C)

RCM2122R

Parameter

Enable cycle time

Enable pulse time

"H" leve

"L" level Enable rise time / decay time Set-up time

RS, R / W, E Address hold time Data set-up time Data hold time

RS

R / W

E

DB0∼DB7

Symbol

t

CYCE

PW

EH

PW

EL

tEr,t

Ef

t

AS

t

AH

t

DDR

t

DHR

V

IH1

V

IL1

t

AS

V

IH1

V

IH2

V

IL2

t

DDR

t

Er

V

OH1

V

OL1

PW

EH

Valid data

Min.

500 220 280

V

IH2

40 10

20

t

−

CYCE

Max.

−

20

−

240

−

V

IH1

V

IL1

t

AH

V

IH1

t

AH

t

Ef

PW

EL

V

IL2

t

DHR

V V

V

IL2

OH1 OL1

Unit

ns ns ns ns ns ns ns ns

Fig.7 Fig.7 Fig.7 Fig.7 Fig.7 Fig.7 Fig.7 Fig.7

Pin function

!!!!

Symbol Level

SS

V V

DD

O

V

I / O

−

− 0V

−

5.0V

3.0∼5.0V

DD∼VO

(V

Resistor select signal

R

S

H / L I

0 : Instruction resistor (Write) Busy flag address counter (Read) 1 : Data resistor (Read / Write)

Read (R) Write (W) Select signal

H / L IR / W

0 : Write MPU → LCD module 1 : Read MPU ← LCD module

E H, H / L I Signal to start read or write data

DB4 DB7

DB0 DB3

∼

H / L I / O

Upper level 4 line data bus

I / OH / L

Also DB7 is enable to use as busy flag Lower level 4 line data bus

These pins are not used during 4-bits operation

Fig.7

Function

Ground electrical potential

Power voltage

LCD drive voltage set termination

)

DD

≥

V

O

≥

V

SS

RCM2122R

Liquid Crystal Displays

Instruction

!!!!

There are two resistors of instruction resistor and data resistor inside the driver IC. And perform the internal operation at recorded the control information temporary here for enabling interface the various CPU or control IC which have different speed than internal operation. Internal operation is controlled by resistor select signal, read and write signal, and data bus signal. List of instruction and operation time are mentioned below.

Instruction

Clear display 0RS0

Cursor at home 000000001

Entry mode 00000001I / DS 53µs

Display ON / OFF control

Cursor / Display shift 000001S / CR / L

Function set 00001DLA

CG RAM address set 0001 A

DD RAM address set 0 0 1 A

Busy flag / Address read

CG RAM / DD RAM data read

I / D=1 : Increment I / D=0 : Decrement S=1 : With display shift S / C=1 : With display shift S / C=0 : Cursor movement R / L=1 : Shift to the right R / L=0 : Shift to the left DL=1 : 8bits DL=0 : 4bits A=0 : Addressing mode 1 A=1 : Addressing mode 2 BF=1 : Internal operation is being performed BF=0 : Instruction acceptable

R/W0DB70DB60DB50DB40DB30DB20DB11DB0

0000001DCB 53µs

01BF

10

∗

1

∗∗∗

∗ Don't care

Code

∗

DD

AC

DD

∗∗

Write Data (DD RAM)

Write Data (CG RAM)

∗∗

Read Data (DD RAM)

Read Data (CG RAM)

∗∗

∗∗∗

CG

AC

CG

Cursor is returned to home position (address o) after entire display clear.

Cursor is returned to home position (address o). Shifted display is also returned

∗

to the original position. Contens of DDRAM are not changed.

Cursor advance direction and display shift are set. These operation are performed during data write and read modes.

Entire display ON / OFF (D), cursor ON / OFF (C), and character blink (B) at cursor position are set.

Cursor and dispaly are shifted without changing the contents of DDRAM.

Interface data length (DL), Addressing mode of DDRAM (A) are set.

CGRAM address is set. After this what is transmitted and received is the data of CGRAM.

DDRAM address is set. After this what is transmitted and received is the data of DDRAM.

Busy flag (BF) showing internal operation and contents of address counter are read.

Data are written in DDRAM or CGRAM

Data are read out of DDRAM or CGRAM

DD RAM : Display data RAM CG RAM : Character generator RAM

CG

: Address of CGRAM

A

DD

: Address of DDRAM

A These correspond to cursor address. AC :Address counter used for both DDRAM and CGRAM.

Description

Execution time(Max.)

(f

CP

or fosc=270kHz)

2.2ms

80µs

53µs

80µs

Exchange time changes with change in internal oscillation frequency (fosc)

0µs

Liquid Crystal Displays

Character code and pattern table

!!!!

Upper 4bits

(HEX)

Lower 4bits (HEX)

XXXX0000

0000

CGRAM

(1)

0010 00110001 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111

RCM2122R

XXXX0001

XXXX0010

XXXX0011

XXXX0100

XXXX0101

XXXX0110

XXXX0111

XXXX1000

XXXX1001

(2)

(3)

(4)

(1)

(2)

(3)

(4)

(1)

(2)

XXXX1010

XXXX1011

XXXX1100

XXXX1101

XXXX1110

XXXX1111

(3)

(4)

(1)

(2)

(3)

(4)

Liquid Crystal Displays

Reset function

!!!!

When the power is supplied, the setting are automatically reset to the initial / default values. The following is concluded during the initial / default setting. Until the initial / default settings are completed, the busy flag remains busy condition. The tivace length when busy flag is a busy condition is 10ms after V The flow of initial / default setting is snow on below diagram.

Display clear

DD

reaches 4.5Volt.

RCM2122R

Function set

Dispaly ON / OFF control

Entry mode

(Note) In case the condition mentioned and by Power supply condition when built in reset circuitb is used can not be satisfied, please make Initializing by CPU based on Initializing by instruction .

DL=1 : 8bits interface data A=0 : Addressing mode 1

D=0 : Dispaly OFF C=0 : Cursor OFF B=0 : Blink OFF

I / D=1 : +1 (Increment) S=0 : No shift

Liquid Crystal Displays

Initializing by instruction

!!!!

Power on

Wait for more than 15ms after V

CC

reach to 4.5V

Function set

Wait for more than 4.1ms

Initializing is done No display

RS R/W DB7DB

6

DB5DB4DB3DB

000011

Interface is 8bits long

2

DB1DB

0

****

RCM2122R

Function set

Wait for more than 100µ

s

Function set

Dispaly OFF

Dispaly clear

Entry mode set

Data write to CG RAM / DD RAM other necesary instruction set

RS R/W DB7DB

000011

6

DB5DB4DB3DB

****

2

DB1DB

0

Interface is 8bits long

RS R/W DB7DB

000011

6

DB5DB4DB3DB

****

2

DB1DB

0

Interface is 8bits long Busy flag check is not possible at previous step, but it is possible at further step.

RS R/W DB7DB

0000111

6

DB5DB4DB3DB

2

DB1DB

0

***

Set up 8bits bus mode / addressing mode 2

0000

0010

0000

0001

00

01

10

It is the case that address become +1 and cursor shifts to right during data write to DD RAM / CG RAM.

RCM2122R

Liquid Crystal Displays

Operation note

!!!!

(1) Handling precautions

• Protect LCDs from strong shocks as these can cause damage of defective operation.

• The polarization plate on the surface of the LCD is soft and can be easily scratched. Wipe away dirt dust lightly with a soft cloth soaked in an alcohol-based cleanser.

• If the liquid crystal panel is damaged and the liquid crystal contacts your hands or clothing wash with soap and copious quantities of water immediately.

• If the unit is to be use for long periods under direct sunlight, use a filter to cut ultraviolet.

•Do not store in areas of high temperature or high humidity. Do not store the unit where it will be exposed to strong sunlight or fluorescent light.

•Using under high temperature or high humidity may cause damages on the polarization plate. (2) Operating precautions

• Do not connect or disconnect the module while the module is in a powered up state.

• Send the input signal only after the module has been powered up. Removing or connecting the LCD driver power supply, when the unit is in the ON state, can cause damage to the LCD. (3) Work precautions

• Use an grounded soldering iron.

• Complete soldering within 3 sec per 1 pin with 280°C±10°C soldering heat.

• Do not apply any physical stress on leads.

• Protect the polarization plate and the side of grass from flux or melted solders in soldering work.

• Do not apply more than 100g weight on the surface and at the corners of LCD. (4)Installation precautions

• Placing protection covers on the panel surface is strongly recommended for protection of the polarization plate.

• Do not apply strong shocks on over-coating resin over the IC when installed to the set. (5)Precautions for COG module

• Do not let light in the IC. The light many cause malfunction. The light protection film attached on LCD can not prevent malfunction perfectly. Light shielding is also necessary on your application.

• A protective film is pasted over the front and back of the module to protect the panel surfaces during shipping and installation. When this film is peeled off, if may hold static electricity. Peel the film off very slowly using an iron blower or other deionizing tool.

• Special protections from static electricity are not applied to the module. Protect static electricity by your application.