Section 14 Dot Matrix Lcd Controller (H8/3854 Group); Overview; Features - Renesas F-ZTAT H8 Series Hardware Manual

Section 14 Dot Matrix LCD Controller
14.1

Overview

The LCD controller has built-in display RAM, and performs dot matrix LCD display. One bit of
display RAM data corresponds to illumination or non-illumination of one dot on the LCD panel,
making possible displays with an extremely high degree of freedom.
The LCD controller incorporates all the functions required for LCD display, allowing a dot matrix
display of up to 40 × 16 dots.
I/O ports are used for the interface with the CPU, offering excellent software heritability when
using a combination of MPU and LCD driver.
This module operates on the subclock, making it ideal for use in small portable devices.
14.1.1

Features

• Built-in bit-mapped display RAM (640 bits)
Maximum of 640 display bits (selectable from 40 × 16 bits or 40 × 8 bits)
• Choice of 1/8 or 1/16 duty
• Low power consumption enabling extended drive on battery power
Subclock operation
Module standby
• Comprehensive display control functions
Display data read/write, display on/off control, read-modify-write
• CPU interface
I/O port interface
• Built-in LCD power supply bleeder resistance circuit
14. Dot Matrix LCD Controller (H8/3854 Group)
(H8/3854 Group)
Rev.3.00 Jul. 19, 2007 page 375 of 532
REJ09B0397-0300