Mono White 320x240 Graphic LCD Module RA8835 Controller for MCU

Description

ERM320240-4 is a 320×240 dot monochrome graphic LCD display module​ (115.17×86.37 mm active area, 122×92 mm visual area, 160×109×11.6 mm outline) built on a COB (Chip-On-Board) package with the RA8835​ controller onboard. It is offered in three LCD chemistries: ERM320240DNS-4​ (FFSTN negative, white glyphs on black), ERM320240SBS-4​ (STN negative blue, white glyphs on blue), and ERM320240FS-4​ (FSTN positive, black glyphs on white) — all with a white LED backlight​ (LED_A 5 V / LED_K 0 V, typ. 150 mA, max 200 mA). The panel uses a 6 o’clock​ preferred viewing direction, 1/64 duty, 1/9 bias.

ERM320240-4 communicates over a classic 8-bit 8080 or 6800 parallel MCU bus, selected by the IM strap, with pins for WR, RD, CS, AO (D/C), RST, DB0–DB7, VDD (4.8–5.2 V typ 5 V, abs max 6.5 V), V0 (LCD drive adjust), and VEE (negative rail). The RA8835 handles the display RAM, cursor, and scroll so the host only writes bytes. Logic supply IDD is ≤80 mA; backlight adds ≤200 mA. No SPI/I²C mode exists on this controller — it targets MCUs with a parallel bus or an 8080/6800 glue-logic shim, not low-pin-count Arduinos.

We provide RA8835 demo code, 8080/6800 timing examples, and wiring references for 8051, STM32 (FSMC), AVR with external memory bus, and generic MCU parallel ports​ on buydisplay.com. The module mounts via a 20-pin 2.54 mm pin header (GND, VDD, V0, WR, RD, CS, AO, RST, DB0–DB7, NC, VEE, LED_A, LED_K) so it drops onto a 0.1″ perf board or a dedicated carrier. No touch layer is offered.

Rated for −20~+70 ℃​ operating and −30~+80 ℃​ storage, ERM320240-4 is an indoor industrial workhorse. The datasheet’s Section 8 (labeled “OLED” by error) applies the usual LCD caution: do not hold a fixed image longer than 2 hours​ to avoid temporary ghosting — reversible by powering an all-black pattern for several hours. Handle the polarizer gently (HB-pencil hardness max, petroleum benzin for cleaning, no water/alcohol on the surface).

That is suitable for a wide range of applications, including industrial control panels, test-equipment readouts, POS auxiliary displays, medical aux screens, vending-machine UIs, and any 5 V MCU project that needs a large, readable 320×240 monochrome graphic screen with a mature RA8835 driver and parallel-bus simplicity.

It's easily controlled by MCU such as 8051,PIC,AVR,ARDUINO,ARM and Raspberry Pi.It can be used in any embedded systems,industrial device,security,medical and hand-held equipment.

Of course, we wouldn't just leave you with a datasheet and a "good luck!".For 8051 microcontroller user,we prepared the detailed tutorial such as interfacing, demo code and Development Kit at the bottom of this page.

Datasheet

Format	Documents Name	Language	Update Date	Size
	ERM320240-4_Series_Datasheet	English	Aug-18-2026	570K
	Controller IC RA8835 Datasheet	English	Aug-15-2006	578K

Datasheet for Touch Panel

Format	Documents Name	Language	Update Date	Size
	5.7 inch 4-Wire Resistive Touch Panel Datasheet	English	Jun-07-2011	205K

Tutorial- 8051 Microcontroller

Format	Documents Name	Language	Update Date	Size
	Parallel Interface Demo Code	English	Jun-18-2009	172K
	8051 Microcontroller Development Board&Kit for ERM320240-1	N/A	N/A	N/A