General Description
The NT7605 is a dot matrix LCD controller and driver LSI that can operate with either a 4-bit or an 8-bit microprocessor (MPU). NT7605 receives control character codes from the MPU, stores them in an internal RAM (up to 80 characters), transforms each character code into a 5 X 7, 5 X 8, or 5 X 10 dot matrix character pattern, and then displays the codes on the LCD panel. The built-in Character Generator ROM consists of 256 different character patterns.
FEATUREs
■ Internal LCD drivers
16 common signal drivers
100 segment signal drivers
■ Maximum display dimensions
20 characters * 2 lines or
40 characters * 1 line
■ Interfaces with 4-bit or 8-bit MPU
■ Versatile display functions provided on chip:
Display Clear, Cursor Home, Display ON/OFF,
Cursor ON/OFF, Character Blinking, Cursor
Shift, and Display Shift
■ Three duty factors, selected by PROGRAM:
1/8, 1/11, and 1/16
■ Displays Data RAM (DD RAM): 80 X 8 bits
(Displays up to 80 characters)
■ Character Generator RAM (CG RAM):
64 X 8 bits for general data,
8 5 X 8 programmable dot patterns, or
4 5 X 10 programmable dot patterns
■ Low voltage reset
■ ITO option for A-type and B-type LCD waveform
■ 2 kinds of LCD pads sequence
■ Character Generator ROM (CG ROM):
2 kinds of CG ROM sizes:
192 characters:
160 5 X 8 dot patterns
32 5 X 10 dot patterns
240 characters:
192 5 X 8 dot patterns
48 5 X 10 dot patterns
Custom CG ROM is also available
■ Built-in power-on reset function
■ Logic power supply: 2.8V ~ 5.5V
■ LCD driver power supply: V1 ~ V5 divided by Built-in LCD power division resister.
■ Two oscillator operations (Freq. = 500KHz - 540KHz):
• Built-in RC oscillation
• External clock
■ CMOS Process
■ Available in COG FORM