LM2088RCW

LM2088RCW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Shi

Date: 2010-05-10

Date:

Rev. Descriptions

Release Date

0.1

New release

2009-06-22

0.2

Update Register Table Summary

2010-02-22

0.3

Update Terminal Functions

2010-05-10

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 1 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

Table of Content

1. Basic Specifications .............................................................................................................. 3

1.1

Display Specifications .......................................................................................................... 3

1.2

Mechanical Specifications .................................................................................................... 3

1.3

Block Diagram ...................................................................................................................... 3

1.4

Terminal Functions ............................................................................................................... 4

2. Absolute Maximum Ratings .................................................................................................. 5

3. Electrical Characteristics ...................................................................................................... 5

3.1

DC Characteristics ............................................................................................................... 5

3.2

LED Backlight Circuit Characteristics ................................................................................... 5

3.3

AC Characteristics ................................................................................................................ 6

3.4

Reset Timing ........................................................................................................................ 6

4. Function Specifications ......................................................................................................... 7

4.1

Adjusting the Display Contrast .............................................................................................. 7

4.2

Resetting the LCD module ................................................................................................... 7

4.3

Interfacing Setting ................................................................................................................ 7

4.4

Display Pixel Map ................................................................................................................. 7

4.5

Control Data and Command ................................................................................................. 8

4.6

Register Table Summary ...................................................................................................... 8

4.7

Initialization Setting Example .............................................................................................. 12

5. Design and Handling Precaution ........................................................................................ 13

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 2 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

1. Basic Specifications

1.1 Display Specifications

1) LCD Display Mode

: FSTN, Positive, Transmissive

2) Display Color

: Display Data = “1” : Dark Gray (*1)

: Display Data = “0” : Light Gray (*2)

3) Viewing Angle

: 6H

4) Driving Method

: 1/240 duty, 1/14 bias

5) Backlight

: White LED backlight

Note:

*1. Color tone may slightly change by Temperature and Driving Condition.

*2. The Color is defined as the inactive / background color

1.2 Mechanical Specifications

1) Outline Dimension

: 160.0 x 109.0 x 12.2 MAX.

see attached Outline Drawing for details

1.3 Block Diagram

BLA

BLK

Backlight Circuit

320 x 240 pixels

LCD Panel

VDD

VSS

Booster &

VOUT

Power Circuit

SEGMENT

Driver

/WR,/RD,RS, /CS,/RST

DB0~DB7

RA8806

BUSY

or equivalent

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 3 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

1.4 Terminal Functions

Pin No.

K1&K2

Name

I/O

Descriptions

VSS

Power

0V Power Supply, GND

VDD

Power

Positive Power Supply

Input

LCD Contrast Reference Input

/WR

Input

Write enable input, active LOW

/RD

Input

Read enable input, active LOW

/CS

Input

Chip Select Signal

/CS=LOW: Data IO is enabled

Input

RS=HIGH: write address of register and read status word

RS=LOW: write & read data of register and DDRAM

Reset Signal:

/RST

Input

/RST = L, Reset the LCD Module

/RST = H, Normal Running

DB0

I/O

8-bit bi-directional data bus

DB7

BUSY

Output

Indicate the RA8806 in busy state or not, could been used for

MPU to get busy state by connecting it to IO port

VOUT

Power

Power Booster Output for V0

BLA

Power

Positive Power Supply for LED backlight

BLK

Power

Negative Power Supply for LED backlight

note:

*1. The LCM Fixed to 80 mode by default, could been changed to 68 mode by changing jumpers

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 4 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

2. Absolute Maximum Ratings

Items

Symbol

Min.

Max.

Unit

Condition

Supply Voltage

V DD

+5.5

V SS = 0V

Input Voltage

V IN

V SS -0.3

V DD +0.3

V SS = 0V

Operating Temperature

T OP

-20

+70

 C

No Condensation

Storage Temperature

T ST

-30

+80

 C

No Condensation

Cautions:

Any Stresses exceeding the Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this

device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may

affect device reliability.

3. Electrical Characteristics

3.1 DC Characteristics

V SS =0V, V DD =5.0V, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit Applicable Pin

Operating Voltage

V DD

4.7

5.0

5.3

VDD

DB0~DB7, /WR, /RD, /CS,

Input High Voltage

V IN

0.8xVDD

VDD

RS, /RES

DB0~DB7, /WR, /RD, /CS,

Input Low Voltage

V IN

VSS

0.1xVDD

RS, /RES

LCD Contrast

Reference Voltage

V 0

23.2

Operating Current

I DD

22.3

mA VDD

3.2 LED Backlight Circuit Characteristics

BLK=0V, If BLA =153mA, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Forward Voltage

Vf BLA

5.0

BLA

Forward Current

If BLA

153

180

BLA

Cautions:

Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.

BLA

BLK

No. of LED = 9 pcs

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 5 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

3.3 AC Characteristics

3.3.1 8080 Mode

V SS =0V, V DD =5.0V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

System Cycle Time (*2)

tcyc8

320

Strobe Pulse Width

tcc8

Address Setup Time

tas8

Address Hold Time

tah8

Data Setup Time

tds8

Data Hold Time

tdh8

Data Access Time

tacc8

Output disable Time

toh8

Note: *1. Input signal rise/fall time should be less than 20ns

*2. System clock=6MHz

*3. Bus timing is for one byte transaction only.

For details, please refer to RA8806 datasheet.

Bus Timing Diagram

3.4 Reset Timing

V SS =0V, V DD =5.0V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Reset setup time

trs

1.3

Reset hold time

trh

1.3

Reset active time (*1)

trst

0.2

Note: *1. System clock=6MHz

Reset Timing Diagram

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 6 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

4. Function Specifications

4.1 Adjusting the Display Contrast

A Variable-Resistor must be connected to the

VDD

LCD module for providing a reference to V0.

VOUT

Adjusting the VR will result the change of LCD

display contrast.

The recommended value of VR is 25k to 50k

VSS

4.2 Resetting the LCD module

The LCD module should be initialized by hardware reset, using /RST terminal.

While turning on the VDD and VSS power supply, maintain /RST terminal at LOW level. After the

power supply stabilized, release the reset terminal (/RST=HIGH)

4.3 Interfacing Setting

Jumpers could been used to change bus interfacing family

Jumper

JP6

JP7

JP8

JP9

Function Description

open

8080 mode 8 bit selected <default>

open

6800 mode 8 bit selected

open

6800 mode 4 bit selected

4.4 Display Pixel Map

1,1

2,1

3,1

4,1

5,1

316,1

317,1

318,1

319,1

320,1

(D7)

(D6)

(D5)

(D4)

(D3)

- - -

(D4)

(D3)

(D2)

(D1)

(D0)

1,2

2,2

3,2

4,2

5,2

316,2

317,2

318,2

319,2

320,2

(D7)

(D6)

(D5)

(D4)

(D3)

- - -

(D4)

(D3)

(D2)

(D1)

(D0)

1,3

2,3

3,3

4,3

5,3

316,3

317,3

318,3

319,3

320,3

(D7)

(D6)

(D5)

(D4)

(D3)

- - -

(D4)

(D3)

(D2)

(D1)

(D0)

1,238

2,238

3,238

4,238

5,238

316,238 317,238 318,238 319,238 320,238

(D7)

(D6)

(D5)

(D4)

(D3)

- - -

(D4)

(D3)

(D2)

(D1)

(D0)

1,239

2,239

3,239

4,239

5,239

316,239 317,239 318,239 319,239 320,239

(D7)

(D6)

(D5)

(D4)

(D3)

- - -

(D4)

(D3)

(D2)

(D1)

(D0)

1,240

2,240

3,240

4,240

5,240

316,240 317,240 318,240 319,240 320,240

(D7)

(D6)

(D5)

(D4)

(D3)

- - -

(D4)

(D3)

(D2)

(D1)

(D0)

Pixel mapping (Top View)

Note:

*1.

Based on the top view of the LCD module,

the 1, 1 (x, y) pixel is the upper-left pixel;

the 320, 240 (x, y) pixel is the lower-right pixel.

*2.

For the details of memory mapping please refer to RA8806 datasheet.

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 7 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

4.5 Control Data and Command

The LCD module setting is controlled by the internal Register Values.

The Register Address should be addressed when RS=1 and Register Value should be issued

when RS=0.

A full command sequence should be as follow.

Steps

/RD

/WR

Data (DB0~ DB7)

1 st

2 nd

4.6 Register Table Summary

Reg.

Add

Name R/W

Descriptions

MBUSY: Memory Write Busy Flag

1=Busy when write font or clear RAM; 0=not busy

SBUSY: Scan Busy Flag

1=Busy when driver scan logic is not idle; 0=not busy

SLEEP: Sleep state

1= In Sleep mode; 0=In Normal mode

WAKE_STS: Wakeup Status Bit Same as REG[0FH] Bit2

KS_STS: Key Status Bit

Same as REG[0FH] Bit1

STATUS

TP_STS: Tp Status Bit

Same as REG[0FH] Bit0

00h

WLCR R/W

PWR : Power Mode

1=In Sleep Mode; 0=In Normal Mode

LINER: linear Decode Mode

1=User-defined ROM mapping rule; 0=GIG5/GB ROM mapping

rule

SR : Software Reset

1=reset all register (except DDRAM); 0=normal operation

CG : Display mode selection

1=Character Mode; 0=Graphic Mode

DP : Display on off control

1=normal display; 0=display off

BK : Full screen blinking control

1=blinking (blink time is set by REG 80H); 0=normal;

DV : Full screen inverse control

1=Inverse Full Screen; 0=Normal

01h

MISC

R/W

NO_FLICKER : Eliminating Flicker

1=enable, scan will auto-pending when busy; 0=disable

CKN : Clock Output in pin CLK_OUT

1=The pin indicates SLEEP state of STATUS REG;

0=The pin output internal system clock

BUSY_LEV : Busy Polarity(for “BUSY” pin)

1=Set Active High; 0=Set Active Low

INT_LEV: Interrupt Polarity (for “INT” pin)

1=Set Active High; 0=Set Active Low

XCK_SEL[1:0] : Driver Clock Selection

00=CLK/8; 01=CLK/4(Default); 10=CLK/2; 11=CLK

The CLK means system clock

SDIR:SEG Scan Direction

1=SEG order is 319~0; 0=SEG order is 0~319

CDIR: COM Scan Direction

1=COM order is 239~0; 0=COM order is 0~239

03h

ADSR R/W

SCR_PEND : scroll Function Pending

1=Scroll function pending; 0=Scroll function keep active

BIT_INV : Set driver data output BIT Order

1=inverse order (BIT7 to BIT0, BIT6 to BIT1, and so on;

0=Normal order

SCR_DIR : Scroll Direction

When SCR_HV=1, 1= Bottom -> Top; 0= Top -> Bottom

When SCR_HV=0, 1=Right -> Left; 0=Left -> Right

SCR_HV : Scroll Horizontal/Vertical Selection

1= Common Scrolling(Vertical); 0= Segment Scrolling(Horizontal)

SCR_EN : Scroll Enable

1=Scroll function enable; 0=Scroll function disable

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 8 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

Reg.

Add

Name R/W

Descriptions

0FH

INTR

R/W

WAKI_EN : Wakeup Interrupt Mask

1=enable ; 0=disable

KEYI_EN : Key-Scan Interrupt Mask

1=enable ; 0=disable

TPI_EN : Touch Panel Interrupt Mask

1=Generate interrupt output if TP was detected; 0=disable

TP_ACT : Touch Panel Event (only read)

1=TP is touched;0=TP is not touched

WAK_STS : Wakeup Interrupt Status bit

1=Indicate wake-up event happen from Sleep mode

0=Indicate no wake-up happen

User must write 0 to clear the status bit

KEY_STS : Key-Scan Interrupt Status bit

1=Key-Scan Detect Key input; 0=Key-Scan don’t Delete key input

User must write 0 to clear the status bit

TP_STS : Touch Panel Detect Status bit

1= TP touched; 0=TP untouched

User must write 0 to clear the status bit

10h

WCCR R/W

CUR_INC : Auto-increase Cursor Position in reading/writing

DDRAM operation

1=disable; 0=enable

FILL_OFS: Full-size and Half-size Character Alignment

1=Full-size alignment in Full-size and Half-size mixed mode;

0=disable

BIT_REV : Reversed Data Write mode

1= inversely; 0= directly

BOLD : Set Bold font (char mode only)

1=bold; 0=normal

T90DEG : Font Rotate mode (Font rotated 90 degree)

1=enable; 0=normal

CUR_EN : Cursor display control

1=on; 0=off

CUR_BLK : Cursor blink control

1=blinking; 0=normal (Blink time is determined by REG 80H)

11h

CHWI

R/W

CURH[3:0] : Cursor Height (Vertical direction, horizontal is fix)

0000b : Cursor height 1pixel

0001b : Cursor height 2 pixels

……

1111b : Cursor height 16 pixels

ROWH[3:0] : Char Line Gap

0000b : Char LineGap 1pixel

0001b : Char LineGap 2 pixels

……

1111b : Char LineGap 16 pixels

12h

MAMR R/W

CUR_HV : Cursor Auto Shifting Direction(only Graphic Mode)

1= Vertical then Horizontal; 0= Horizontal then Vertical

DISPMD[2:0] : Display Layer and Display Mode Selection

001=page1 only(default); 010=page2 only;

011=combine two layer; 000=gray scale mode

110=extended mode1, 111=extended mode2

L_MIX[1:0] : two layer mode setting

00=OR; 01=XOR; 10=NOR; 11=AND

MW[1:0] : Layer Read/Write Selection

00=CGRAM(512Byte); 01=page1; 10=page2;

11=page1 & page2 at the same time

20h

AWRR R/W

AWR[5:0]: Active Window Right Position ->Segment-Right

Default Value:27h

21h

DWRR R/W

DWW[5:0] : Display Window Width Position -> Segment-Width

Segment-Width = (Segment Number / 8) – 1

Default Value:27h

30h

AWBR R/W

AWT[7:0] : Active Window Bottom Position->Common-Bottom

Default Value: efh

31h

DWHR R/W

DWH[7:0] : Display Window Bottom Position->Common-Height

Common-Height = LCD Common Number – 1

Default Value: efh

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 9 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

Reg.

Add

Name R/W

Descriptions

40h

AWLR R/W

AWL[5:0] : Active Window Left Position-> Segment-Left

Default Value:00h

50h

AWTR R/W

AWT[7:0] : Active Window Top Position -> Common- Top

Default Value:00h

60h

CURX R/W

CURX[5:0] : Cursor Position of Segment /CGRAM address[4:0]

61h

BGSG R/W

BGSG[5:0] : Segment Start Position of Scrolling Mode

62h

EDSG R/W

EDSG[5:0] : Segment End Position of Scrolling Mode

70h

CURY R/W

RC7~RC0 : Cursor Position of Common /CGRAM address[8:5]

71h

BGCM R/W

BGCM[7:0] : Common Start Position of Scrolling Mode

72h

EDCM R/W

EDCN[7:0] : Common Ending Position of Scrolling Mode

80h

BTMR R/W

BLKT[7:0] : Cursor Blink Time and Scroll Time

Blinking Time = Bit[7:0] x (Frame width)

Frame width = 1 / Frame Rate

90h

ITCR

R/W

ITC[7:0] : Idle Time Setting, In count of system clock

FR_time = COM_NO x （ SEG_NO / 4 + ITC ） / XCK

FR_time = 1 / Frame Rate

A0h

KSCR1 R/W

KSCR1[7] : Key Scan Enable

1=enable, 0=disable

KSCR1[6] : Key Scan Enable

1 : 4x8 Matrix(KOUT[3:0] is used, KOUT[7:4] please keep floating)

0 : 8x8 Matrix(KOUT[7:0] is used)

KSCR1[5:4] : Key Scan Data Sampling Times

00: 4, 01: 8, 10: 16, 11:32

KSCR1[3] : Long Time Key Function

1=enable, 00=disable

KSCR1[2:0] : Key Scan Freq

A1h

KSCR2 R/W

KSCR2[7] : Key Scan Wakeup Function

1=enable, 0=disable

KSCR2[3:2] : Long Key Timing Adjustment

KSCR2[1:0] : Number of Key Hit

A2h

KSDR0

KSDR0[7:0] : Key Strobe Data

A3h

KSDR1

KSDR1[7:0] : Key Strobe Data

A4h

KSDR2

KSDR2[7:0] : Key Strobe Data

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 10 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

B0h

MWCR

MWD[7:0] : The Data is written to memory under the cursor

position

B1h

MRCR

MRD[7:0] : The Data is Read from memory under the cursor

position

C0h

TPCR1 R/W

TPCR1[7] : Touch Panel Enable

1=enable, 0=disable

TPCR1[6:4] : Touch Panel Sample Time adjustment

TPCR1[3] : Touch Panel Wake-Up

1=enable, 0=disable

TPCR1[2:0] : Touch Panel ADC Convert Speed

C1h

TPXR

TPXR[7:0] : Touch Panel X Data Bit[9:2]

C2h

TPYR

TPYR[7:0] : Touch Panel Y Data Bit[9:2]

C3h

TPZR

TPZR[3:2] : Touch Panel Y Data Bit[1:0]

TPZR[1:0] : Touch Panel X Data Bit[1:0]

C4h

TPCR2 R/W

TPCR2[7] : TP Manual Mode

1=manual mode, 0=auto mode

TPCR2[1:0] : TP manual mode Options

E0h

PNTR R/W

PND[7:0] : Data Written to DDRAM when REGF0H Bit3=1

F0h

FNCR R/W

ISO8859_EN : ISO8859 Mode

1=disable; 0=enable

MCLR : Memory Clear function

1=enable fill data of REG E0H to DDRAM under Active Window

area; 0=no action;

ASC : Font ROM range select

1=decode as ASCII; 0=auto treat as ASCII or GB

ASC_SEL[1:0] : ASCII Block Selection

00=map to ASCII block 1; 01=map to ASCII block 2;

10=map to ASCII block 3; 11=map to ASCII block 4

F1h

FVHT

R/W

FH1~FV0 : Font Horizontal Size

00=1x; 01=2x; 10=3x; 11=4x

FV1~FV0 : Font Vertical Size

00=1x; 01=2x; 10=3x; 11=4x

Note:

*1. It is suggested to check the BUSY before sending the Control Data.

*2. For the details, please refer to RA8806 Data sheet.

*3. Key Scan function is for the LCM equipped with Keys Terminal only

*4. Touch Panel Function is for the LCM equipped with Touch Panel only

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 11 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

4.7 Initialization Setting Example

The following setting should be issue to LCD module after hardware reset.

(example could be adjusted, if necessary.)

Value

Add

Name

(binary)

(hex)

Note

00h

WLCR

0000 0100

Power Mode = Normal Mode

Software Reset = Normal Operation

Display mode = Graphical Mode

Display on

Full screen blinking control = normal (no blinking)

Full screen inverse = normal (no inverse)

01h

MISC

0110 1000

Eliminating Flicker = normal

Busy is High active

XCK = CLK/2

SEG/COM order are normal order

03h

ADSR

0000 0000

Scrolling function is disable

0Fh

INTR

0000 0000

Set interrupts are disable

10h

WCCR

0000 0110

Auto-increase Cursor Position

Chinese/English char alignment = disable

Store Current Data to DDRAM = directly

Set Bold font (char mode only) = normal

Font rotate mode = disable

Cursor on

Cursor blink

11h

DWLR

1110 0000

Cursor Height = 15 pixels

Line Distance = 1 pixel

20h

AWRR

0010 0111

Active Window Right Register = 40

21h

DWRR

0010 0111

Display Window Right Register = 40

30h

AWBR

1110 1111

Active Window Bottom Register = 240

31h

DWBR

1110 1111

Display Window Bottom Register = 240

40h

AWLR

0000 0000

Active Window Left Register = 00

50h

AWTR

0000 0000

Active Window Top Register = 00

90h

SCCR

0110 1010

Idle Time set (set to ~66Hz, when system clock=6MHz)

F0h

FNCR

1000 0000

Memory Clear Function = no action

F1h

FVHT

0000 0000

Font is normal

Note:

Others un-mentioned registers are using its hardware reset default value.

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 12 of 13

TOPWAY

LCD Module User Manual

LM2088RCW

5. Design and Handling Precaution

Please refer to "LCD-Module-Design-Handling-Precaution.pdf".

URL: www.topwaydisplay.com

Document Name: LM2088RCW-Manual-Rev0.3

Page: 13 of 13