Liquid crystal displays

20 characters

2 lines COG module

RCM2072R

The RCM2072R is a reflective TN type liquid crystal module with a built-in controller / driver LSI and a display capacity
of 20 characters

2 lines.

Applications

Printers, copiers, facsimiles, etc.

Features

1) Wide viewing angle and high contrast.
2) 5

7 dot character matrix with cursor.

3) Interfaces with 4-bit or 8-bit MPUs.
4) Displays up to 237 characters and special symbols
5) Custom character patterns are displayed with the

character RAM.

6) Abundant instruction set including clear display, cur-

sor on / off, and character blinking.

7) Compact and lightweight for easy assembly to the

host instrument.

8) Operable on single 5V power supply.
9) Low power consumption.

External dimensions (Units: mm)

Liquid crystal displays

RCM2072R

Absolute maximum ratings (Ta = 25

Electrical characteristics (V

= 5.0

�

5%, Ta = 25

Optical characteristics (Ta = 25

When viewing from below

Liquid crystal displays

RCM2072R

Pin functions

Note: In order to be able to interface with 4-bit or 8-bit MPUs, the module supports data transfer with two

transmissions of 4 bits at a time or one transmission of 8 bits at once.

(1) When the interface data length is 4 bits, data is transferred between the MPU along DB4 through DB7

buses and DB0 through DB3 buses are not used. Data transferral is completed after two transfers of 4 bit

data. First the upper nibble (contents of DB4 through DB7 during 8-bit interfacing) is transferred and then

the lower nibble (contents of DB0 through DB3 during 8-bit interfacing) is transferred. Check for busy

flag occurs after the second 4-bit data (one instruction) is transferred. At that time, the busy flag and

address counter data is also output in two 4-bit increments.

(2) When the interface data length is 8 bits, the data DB0 through DB7 is transferred along the eight data

buses.