Overview
The DM1620 is an LCD dot matrix display module that consists of an LCD panel and controller / driver circuits. It is capable of displaying two lines of 16 characters. The DM2023 module incorporates the control circuits, data RAM, and character generator ROM required for display. The DM1620 provides both 8-bit and 4-bit parallel interfaces, and allows the controlling microprocessor to read and write data directly.

General Specifications
1. Drive method : 1 / 16 duty, 1 / 5 bias (1 / 4 bias for the STN version)
2. Display size : 16 characters ✕ 2 lines
3. Character structer structure : 5 ✕ 8 dots
4. Display data RAM : 80 characters (80 ✕ 8 bits)
5. Character generator ROM : 192 characters (See table 1.)
6. Character generator RAM : 8 characters (64 ✕ 8 bits)
7. Instruction function : See table 2.
8. Circuit structure : See the block diagram.