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RCM2122R
Liquid Crystal Displays
16 character x 1 line COG module
RCM2122R
RCM2122R is LCD module which controller / driver LSI built in. For display of 16 character x 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 x 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.
!External dimensions (Units : mm)
0.3Max. 1Max. 4.790.3 3Max. 60.20.3 57.2Min.
6.140.3
16.35Max. 13.35Max. 3.35Min. 0.35Min.
3Max.
(50.62)
2.750.3 1.10.1 1.10.1
0.50.5
23.70.3 (16.7)
(5.2)
13.7Min.
4.30.3
501.3 7.00.3
Over-coating regin
1 14-0.70.1 (P1.0x13)130.1 150.3 (7.8) (9.8)
14 Terminal side 0.30.05 36.61.3
0.50.5 1
(1.2)
0.50.5 2.62 0.08 0.58
0.58
0.46
2 0.50.5 0.50.5
5.2
0.08
1.5Max.
7.50.5
1.2 (6.7) (8.55)
1.5
(9) (11)
0.50.5
0.50.5
Dot detail
RCM2122R
Liquid Crystal Displays
!Block diagram
DB0 8 16 LCD DB7 IC1 40 40
E R/W RS VO VDD VSS
!Pin functions
Pin No. 1 2 3 4 5 6 7 Symbol DB7 DB6 DB5 DB4 DB3 DB2 DB1 Pin No. 8 9 10 11 12 13 14 Symbol DB0 E R/W RS VO VDD VSS
!DD RAM Address (1) Addressing mode 1 (A=0)
1 Line 1 00 2 01 3 02 4 03 5 04 6 05 7 06 8 07 9 08 10 09 11 0A 12 13 14 15 0B 0C 0D 0E 16 (Display position) 0F
DD RAM ADDRESS (16H)
(2) Addressing mode 2 (A=1)
1Line 1 00 2 01 3 02 4 03 5 04 6 05 7 06 8 07 9 40 10 41 11 42 12 43 13 44 14 45 15 46 16 (Display position) 47
DD RAM ADDRESS (16H)
Note) The above shows the addresses when the display off is not conducted.
RCM2122R
Liquid Crystal Displays
!Power supply sample connect
VDD VDD-VO LCD MODULE VO VR : 10k VDD
VSS
Fig.1
(Note) As operating voltage, (VDD-VO)V is charged to LCD.
Optimum operating voltage changes by viewing angle and temperature. Contrast can be changed by adjustment of VO, so please use LCD module at most suitable condition by each operating situation. When you fix the VO, please check using by actual set.
!Absolute maximum ratings (Ta=25C)
Parameter Supply voltage for logics Supply voltage for driving LCD Input voltage Operating temperature rang Storage temperature rang Symbol VDD-VSS VDD-VO VIN Topr Tstg Min. -0.3 -0.3 -0.3 0 -20 Max. 6.0 6.0 VDD+0.3 50 70 Unit V V V C C
!Electrical characteristics (VDD=5.05%, Ta=25C)
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 Symbol VDD VDD-VO VIH1 VIL1 VIH2 VIL2 VOH VOL IDD Min. 4.75 3.0 2.3 0 0.8VDD 0 2.4 - - Typ. 5.0 - - - - - - - 1.4 Max. 5.25 VDD VDD 0.8 VDD 0.2VDD - 0.4 3.6 Unit V V V V V V V V mA All terminals except E terminal Conditions
E IOH=-0.205mA IOL=1.6mA VDD=5.0V, fosc=270kHz
!Optical characteristics (Ta=25C)
Parameter Rise time Decay time Contrast ratio Symbol tr td K Min. - - 1.4 - 40 30 Typ. 100 150 2.0 - - - Max. 200 250 - 10 - - Unit ms ms - deg deg deg Conditions
=10, =0 =10, =0 =10, =0
=0, K1.4
1
Viewing angle
2
=20, K1.4
RCM2122R
Liquid Crystal Displays
(1) Difinition of and
Z [ =0 ]
(2) Difinition of viewing angle 1 and 2
Viewing direction (12:00)
Y [ =180 ] 2' 1' 1 2
Contrast ratio
1.4
X'
X
1
2 Viewing angle
Fig.2
Y' [ =0 ]
Fig.3
Viewing direction (6:00)
(3) Difinition of contrast ratio K
(4) Difinition of optical response time
Selected 100
Brightness (%)
K=B2 / B1 B2
Non-selected
90% 100%
B1
Selected condition
0
tr
Driving voltage
Rise time
td
Fig.4
Fig.5
!Timing characteristics (1) Writing (VDD=5V5%, VSS=0V, Ta=0+50C)
Parameter Enable cycle time "H" level Enable pulse time "L" level Symbol tCYCE Min. 500 220 280 - 40 10 60 10
VIH1 tAH VIL1
Max. - - - 20 - - - -
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
PWEH PWEL
tEr,tEf tAS tAH tDSW tH
Enable rise time / decay time Set-up time Address hold time Data set-up time Data hold time
RS VIL1
RS, R / W, E
VIH1 tAS
R/W
VIL1 PWEH tAH
VIL1
tEf PWEL E VIL2 tEr DB0DB7 VIH1 VIL1 VIH2 tDSW VIH2 VIL2 tH VIH1 VIL1
tCYCE
VIL2
Valid data
Fig.6
10%
Decay time
RCM2122R
Liquid Crystal Displays
(2) Reading (VDD=5V5%, VSS=0V, Ta=0+50C)
Parameter Enable cycle time "H" leve Enable pulse time "L" level Symbol tCYCE Min. 500 220 280 - 40 10 - 20 Max. - - - 20 - - 240 - 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
PWEH PWEL
tEr,tEf tAS tAH tDDR tDHR
Enable rise time / decay time Set-up time Address hold time Data set-up time Data hold time RS, R / W, E
RS
VIH1 VIL1 tAS VIH1
VIH1 VIL1 tAH
R/W
VIH1 PWEH tAH tEf PWEL VIL2 tDHR VOH1 VOL1 VOH1 VOL1 VIL2
E
VIL2 tEr
VIH2 tDDR
VIH2
DB0DB7
Valid data
tCYCE
Fig.7
!Pin function
Symbol VSS VDD VO Level - - - I/O - - - 0V 5.0V 3.05.0V (VDDVO) Resistor select signal 0 : Instruction resistor (Write) Busy flag address counter (Read) 1 : Data resistor (Read / Write) Read (R) Write (W) Select signal 0 : Write MPU LCD module 1 : Read MPU LCD module Signal to start read or write data Upper level 4 line data bus Also DB7 is enable to use as busy flag Lower level 4 line data bus These pins are not used during 4-bits operation Function Ground electrical potential Power voltage LCD drive voltage set termination VDD VO VSS
RS
H/L
I
R/W E DB4
H/L H, H / L H/L
I I I/O
DB7 DB0 H/L I/O DB3
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.
Code Instruction RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Clear display 0 0 0 0 0 0 0 0 0 1 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 ACG : Address of CGRAM ADD : Address of DDRAM These correspond to cursor address. AC :Address counter used for both DDRAM and CGRAM. Description
Execution time(Max.) (fCP or fosc=270kHz) 2.2ms
Cursor at home
0
0
0
0
0
0
0
0
1
2.2ms
Entry mode
0
0
0
0
0
0
0
1 I/D S
53s
Display ON / OFF control Cursor / Display shift Function set
0
0
0
0
0
0
1
D
C
B
53s
0 0
0 0
0 0
0 0
0 1
1 S/C R/L DL A
80s 53s
CG RAM address set
0
0
0
1
ACG
53s
DD RAM address set
0
0
1
ADD ACDD ACCG Write Data (CG RAM) Read Data (CG RAM)
53s
Busy flag / Address read CG RAM / DD RAM data read CG RAM / DD RAM data read
0 1 1
1 0 1
BF
0s 53s 80s Exchange time changes with change in internal oscillation frequency (fosc)

Write Data (DD RAM)
Read Data (DD RAM)
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 Don't care
RCM2122R
Liquid Crystal Displays
!Character code and pattern table
Upper 4bits (HEX) Lower 4bits (HEX)
0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 CGRAM (1)
XXXX0000
XXXX0001
(2)
XXXX0010
(3)
XXXX0011
(4)
XXXX0100
(1)
XXXX0101
(2)
XXXX0110
(3)
XXXX0111
(4)
XXXX1000
(1)
XXXX1001
(2)
XXXX1010
(3)
XXXX1011
(4)
XXXX1100
(1)
XXXX1101
(2)
XXXX1110
(3)
XXXX1111
(4)
RCM2122R
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 VDD reaches 4.5Volt. The flow of initial / default setting is snow on below diagram.
Display clear 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
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 .
RCM2122R
Liquid Crystal Displays
!Initializing by instruction
Power on Initializing is done No display
Wait for more than 15ms after VCC reach to 4.5V
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Function set
0
0
0
0
1
1
*
*
*
*
Interface is 8bits long Wait for more than 4.1ms
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Function set
0
0
0
0
1
1
*
*
*
*
Interface is 8bits long Wait for more than 100s
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Function set
0
0
0
0
1
1
*
*
*
*
Interface is 8bits long Busy flag check is not possible at previous step, but it is possible at further step.
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Function set
0
0
0
0
1
1
1
*
0
*
0
*
0
Set up 8bits bus mode / addressing mode 2 Dispaly OFF
0 0 0 0 0 0 1
Dispaly clear
0
0
0
0
0
0
0
0
0
1
Entry mode set
0
0
0
0
0
0
0
1
1
0
It is the case that address become +1 and cursor shifts to right during data write to DD RAM / CG RAM. Data write to CG RAM / DD RAM other necesary instruction set
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 280C10C 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.

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