03805-21-0100 IEE (INDUSTRIAL ELECTRONIC ENGINEERS), 03805-21-0100 Datasheet - Page 6

• Manufacturer Part Number: 03805-21-0100
• Description: 92B7890
• Manufacturer: IEE (INDUSTRIAL ELECTRONIC ENGINEERS)

Specifications of 03805-21-0100

• No. Of Digits / Alpha: 160
• Character Count X Line: 40 X 4
• Character Size: 10.4mm
• Supply Voltage: 5V
• Display Mode: Reflective
• Display Area Width: 248.7mm
• Display Area Height: 51.5mm

2.2
The LCD Controller includes all of the circuitry necessary to take parallel input data and create the necessary
control functions and characters. The block diagram of the controller is shown in Figure 2 below. The
remaining subparagraphs of Section 2 describe the major function blocks.
2.2.1 Instruction Register (IR)
The IR stores instruction codes such as display clear and cursor shift, and address information of the display
data RAM (DD RAM) and character generator RAM (CG RAM). The IR can be written from the MPU, but not
read.
2.2.2 Data Register (DR)
The DR temporarily stores data to be written into or read from the DD RAM or the CG RAM.
2.2.3 Busy Flag
When the Busy Flag is a "1", the module is in an internal operating mode and ignores any additional instructions
(Refer to Read Busy Flag and Address instruction).
DB4–DB7
DB0–DB3
R/W
RS
E
Industrial Electronic Engineers, Inc.
LCD Controller
4
4
Van Nuys, California
8
7
8
Busy
Flag
Figure 2
8
8
Generator
(CG RAM)
Character
512 Bits
RAM
(Parallel Data –Serial Data)
5
Parallel/Serial Data
LCD Controller Block Diagram
Conversion Circuit
7
Scale: NONE
Counter (AC)
SIZE
Address
A
Display Data
Generator
(CG ROM)
(DD RAM)
Character
7200 Bits
80x8 bits
RAM
ROM
CODE IDENT NO.
5
8
Timing Generation
05464
7
Circuit
Rev
C
40–bit Shift Register
3
Sheet 6
S03805–21–0100
16
Com1–Com16
Seg1–Seg40
16
40
CL1
CL2
M
D