TOPWAY

LCD Module User Manual

LM2068R-4

www.topwaysz.com

Document Name: LM2068R-4-Manual-Rev0.2

Page: 4 of 12

1.4

Terminal Functions

Pin

No.

Pin

Name

I/O

Descriptions

1

VSS

Power

0V Power Supply, GND

2

VDD

Power

Positive Power Supply

3

V0

Input

LCD Contrast Reference Input

4

/WR

Input

Write enable input, active LOW

5

/RD

Input

Read enable input, active LOW

6

/CS

Input

Chip Select Signal

/CS=LOW: Data IO is enabled

7

RS

Input

Register Select

RS=HIGH: data on DB0 to DB7 is display data

RS=LOW: data on DB0 to DB7 is control data

8

/RST

Input

Reset Signal:

/RST = L, Reset the LCD Module

/RST = H, Normal Running

9

DB0

:

:

16

DB7

I/O

8-bit bi-directional data bus

17

BUSY

OUTPUT Controller busy signal,

MCU should poll this signal before accessing the LCD module

18

VOUT

Power

Power Booster Output for V0

19

BLA

Power

Positive Power Supply for LED backlight

20

BLK

Power

Negative Power Supply for LED backlight

Note: For enable BUSY output, the REG[A0] D0, D1, D2 or D3 should be set to hi.