LM2088SCW

LM2088SCW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Yang Lin

Date: 2009-06-15

Date:

Rev. Descriptions

Release Date

0.1

New release

2008-08-27

0.2

Typing correction on 3.1 DC Characteristics , Update backlight circuit on

2008-09-20

3.2 LED Backlight Circuit Characteristics

0.3

Update DC Characteristics

2009-06-15

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Document Name: LM2088SCW-Manual-Rev0.3

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LCD Module User Manual

LM2088SCW

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 ....................................................................................................................... 7

4. Function Specifications ......................................................................................................... 8

4.1

Adjusting the Display Contrast ......................................................................................... 8

4.2

Resetting the LCD module ................................................................................................. 8

4.3

Interfacing Setting .............................................................................................................. 8

4.4

Display Pixel Map ............................................................................................................... 8

4.5

Command Summary........................................................................................................... 9

4.6

Initialization Setting Example .......................................................................................... 10

5. Design and Handling Precaution ........................................................................................ 11

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LCD Module User Manual

LM2088SCW

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 11.2 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,A0, /CS,/RES

DB0~DB7

RA8835

SEL1

or equivalent

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1.4 Terminal Functions

Pin No.

K1&K4

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

Data Type Select

A0=H: command write, display data or cursor add read

A0=L: status flag read, display data or parameter write

/RES

Input

Reset Signal:

/RES = L, Reset the LCD Module

/RES = H, Normal Running

DB0

I/O

8-bit bi-directional data bus

DB7

No connection, Leave open

VOUT

Power Power Booster Output for V0

BLA

Power Positive Power Supply for LED backlight

BLK

Power Negative Power Supply for LED backlight

SEL1

Input

80 mode or 68 mode selection(*1)

No connection, Leave open

note:

*1.

SEL1 fixed to low (80 mode) by internal Jumper JP4

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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

-10

+60

 C

No Condensation

Storage Temperature

T ST

-20

+70

 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

A0, /RES

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

Input Low Voltage

V IN

VSS

0.1xVDD

A0, /RES

LCD Contrast

Reference Voltage

V 0

23.2

Operating Current

I DD

33.0

mA VDD

3.2 LED Backlight Circuit Characteristics

BLK=0V, If BLA = 153 mA, 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 = 9pcs

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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

Address Hold Time

tah8

Address Setup Time

taw8

System Cycle Time

tcyc8

(*2)

Strobe Pulse Width

tcc8

150

Data Setup Time

tds8

150

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. For memory control and system control commands: tcyc8=2tc+tcc8+tcea+75>tacv+245

For all other command: tcyc8=4tc+tcc8+30

*3. Please see the RA8835 data sheet for details

Bus Timing Diagram

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3.3.2 6800 Mode

V SS =0V, V DD =5.0V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

System Cycle Time

tcyc6

(*2)

Address Setup Time

taw6

Address Hold Time

tah6

Data Setup Time

tds6

125

Data Hold Time

tdh6

Output disable Time

toh6

Data Access Time

tacc6

110

Enable Pulse Width

tew6

150

Note:

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

*2. For memory control and system control commands: tcyc8=2tc+tew6+tcea+75>tacv+245

*3. For all other command: tcyc8=4tc+tcc+30

*4. Please see the RA8835 data sheet for details

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 Plus

tres

1.0

Reset Timing Diagram

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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 /RES terminal.

4.3 Interfacing Setting

Either Jumpers or Signal “SEL1” (K5)could been used to change bus interfacing family

Jumper

JP4

JP3

SEL1

Function Discription

open

8080 mode selected <default>

open

6800 mode 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 RA8835 datasheet.

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4.5 Command Summary

Para-

Command meter

HEX Descriptions

SYSTEM

1 1 0 0

40 Init device and display (with 8 parameters)

SET

0 1 0 0

1 W/S M2 M1 M0

M0=0: internal CG ROM

M0=1: external CG ROM

M1=0: no D6 correction

M1=1: D6 correction

M2=0: 8-pixel char height

M2=1: 16-pixel char height

W/S=0: single panel drive

W/S=1: dual panel drive

IV=0: Screen top-line correction

IV=1: No screen top-line correction

0 1 0 WF 0

FX: define the horizontal char size

WF=0: 16-line AC drive

WF=1: two frame AC drive

0 1 0 0

FY: Vertical Char Size

0 1 0

C/R

C/R: display line address range

0 1 0

TC/R

TC/R: Line length selection

0 1 0

L/F

L/F: Frame Height selection

0 1 0

APL

APL: Horizontal address range (low byte)

0 1 0

APH

APH: Horizontal address range (high byte)

SLEEP IN

1 1 0 0

53 Enter standby mode

DISP

1 1 0 0

D 58 / 59 Enable and disable display and display flashing (with 1 parameter)

ON/OFF

0 1 0 FP5 FP4 FP3 FP2 FP1 FP0 FC1 FC0

Each pair of bit in FP sets the attributes of one screen block

SCROLL

1 1 0 0

44 Set display start address and display regions (with 8 or 10 parameters)

0 1 0 A7 A6 A5 A4 A3 A2 A1 A0

SAD 1L

0 1 0 A15 A14 A13 A12 A11 A10 A9 A8

SAD 1H

0 1 0 L7 L6 L5 L4 L3 L2 L1

SL1

0 1 0 A7 A6 A5 A4 A3 A2 A1 A0

SAD 2L

0 1 0 A15 A14 A13 A12 A11 A10 A9 A8

SAD 2H

0 1 0 L7 L6 L5 L4 L3 L2 L1

SL2

0 1 0 A7 A6 A5 A4 A3 A2 A1 A0

SAD3L

0 1 0 A15 A14 A13 A12 A11 A10 A9 A8

SAD3H

0 1 0 A7 A6 A5 A4 A3 A2 A1 A0

SAD4L (for both two-screen drive and two layer config are select)

P10 0 1 0 A15 A14 A13 A12 A11 A10 A9 A8

SAD4H (for both two-screen drive and two layer config are select)

CSRFORM

1 1 0 0

5D Set cursor type (with 2 parameters)

0 1 0 0

CRX

0 1 0 CM 0

CRY

CM=0: underscore cursor; CM=1: block cursor

CGRAM

1 1 0 0

5C Set Start address of char generator RAM (with 2 parameters)

ADR

0 1 0 A7 A6 A5 A4 A3 A2 A1 A0

SAGL

0 1 0 A15 A14 A13 A12 A11 A10 A9 A8

SAGH

CSRDIR

1 1 0 0

1 CD1 CD0 4C~4F Set Direction of Cursor movement

HDOT SCR

1 1 0 0

5A Set horizontal scroll position (with 1 parameters)

0 1 0 0

0 D2 D1 D0

OVLAY

1 1 0 0

5B Set display overlay format (with 1 parameters)

0 1 0 0

0 OV DM2 DM1 MX1 MX0

CSRW

1 1 0 0

46 Set cursor address (with 2 parameters)

0 1 0 A7 A6 A5 A4 A3 A2 A1 A0

CSRL

0 1 0 A15 A14 A13 A12 A11 A10 A9 A8

CSRH

CSRR

1 1 0 0

47 Read Cursor Address (with 2 parameters)

1 0 1 A7 A6 A5 A4 A3 A2 A1 A0

CSRL

1 0 1 A15 A14 A13 A12 A11 A10 A9 A8

CSRH

MWRITE

1 1 0 0

42 Write to display memory (with n parameters)

0 1 0

Memory Data

Display memory data

: : :

0 1 0

Memory Data

MREAD

1 1 0 0

43 Read from display memory (with n parameters)

1 0 1

Memory Data

Display memory data

: : :

1 0 1

Memory Data

Note:

For details please refer to RA8835 datasheet.

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4.6 Initialization Setting Example

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

(It is an example only; it could be adjusted if necessary.)

Value

Command Parameter

(binary)

HEX Descriptions

SYSTEM

0100 0000

Init device and display,

SET

(with 8 parameters)

0011 0000

M0=0: internal CG ROM

M0=1: external CG ROM

M1=0: no D6 correction

M1=1: D6 correction

M2=0: 8-pixel char height

M2=1: 16-pixel char height

W/S=0: single panel drive

W/S=1: dual panel drive

IV=0: Screen top-line correction

IV=1: No screen top-line correction

1000 0111

FX: define the horizontal char size

WF=0: 16-line AC drive

WF=1: two frame AC drive

0000 0000

FY: Vertical Char Size

0010 1000

C/R: display line address range

0100 0101

TC/R: Line length selection

1110 1111

L/F: Frame Height selection

0010 1000

APL: Horizontal address range (low byte)

0000 0000

APH: Horizontal address range (high byte)

DISP

0101 1001

Enable

ON/OFF

0000 0100

SCROLL

0100 0100

Set cursor type (with 10 parameters)

0000 0000

SAD 1L

0000 0000

SAD 1H

1110 1111

SL1

0000 0000

SAD 2L

0000 0000

SAD 2H

1110 1111

SL2

0000 0000

SAD3L

0000 0000

SAD3H

CSRDIR

0100 1100

Set Direction of Cursor movement

HDOT SCR

0101 1010

Set horizontal scroll position (with 1 parameters)

0000 0000

OVLAY

0101 1011

Set display overlay format (with 1 parameters)

0000 1101

CSRW

0100 0110

Set cursor address (with 2 parameters)

0000 0000

CSRL

0000 0000

CSRH

MWRITE

0100 0010

Write to display memory (with n parameters)

Memory Data

Display memory data

Memory Data

Note:

For details please refer to RA8835 datasheet.

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5. Design and Handling Precaution

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

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