INTRODUCTION

The NT7963 is an LCD controller designed to be used with LCD control driver LSIs and data

display memories. The device has an 8-bit parallel data bus and control lines for reading or

writing through a MPU interface.

It has a 128 words character generator ROM which can control an external display RAM of up

to 64 Kbytes. Allocation of text, graphic and external character generator RAM can be made

easily and the display window can be moved freely within the allocated memory range.

The device supports a very board range of LCD formats be allowing selection of different

combinations via set of programmable inputs. It can be used in text, graphic and combination

text-and-graphic modes, and includes various attribute functions.

FEATURES

•Display format (pin-selectable)

Columns: 32, 40, 64, 80

Lines: 2, 4, 6, 8, 10, 12, 14, 16

The combination of number of columns and number of lines must not cause the frequency to

exceed 10 MHz.

•Character font (pin-selectable)

Horizontal dots: 5, 6, 7, 8

Vertical dots: 8 (fixed)

It is necessary to set a character font in Graphic mode just as in Text mode. The oscillation

frequency does not change with the font selection.

•Display duty: 1 / 16 to 1 / 128

•A 128−word character generator ROM is built in as standard.

•External display memory: 64 KB max

The addresses in display memory of the text area, graphic area and external character

generator area are determined by software.

•Read or Write operations from the CPU do not disturb the display.

•A crystal oscillator circuit is built in. The oscillation frequency is adjusted according to the

display size. If using an external clock, use the XI pin as the clock input. (XO open.)

External capacitors Crystal oscillation: 20 to 30 pF

Ceramic oscillation: 30 to 100 pF

Built in feedback resistor: 1MΩ (typ.)

•NT7086 can be connected to the device.

•External display RAM must be static RAM. The NT7963 cannot refresh D-RAM.

•The attribute functions can only be used in Text mode. They cannot be used in Graphic or

Combination Character mode.