Datasheet

Section 13 LCD Controller/Driver
Rev. 6.00 Aug 04, 2006 page 431 of 680
REJ09B0145-0600
Section 13 LCD Controller/Driver
13.1 Overview
This LSI has an on-chip segment type LCD control circuit, LCD driver, and power supply circuit,
enabling it to directly drive an LCD panel.
13.1.1 Features
Features of the LCD controller/driver are given below.
• Display capacity
Duty Cycle Internal Driver Segment External Expansion Driver*
Static 40 seg 256 seg
1/2 40 seg 128 seg
1/3 40 seg 64 seg
1/4 40 seg 64 seg
Note: * The external expansion function for LCD segments is not implemented in the H8/38347
Group and H8/38447 Group.
• LCD RAM capacity
8 bits × 32 bytes (256 bits)
• Word access to LCD RAM
• All eight segment output pins can be used individually as port pins.
• Common output pins not used because of the duty cycle can be used for common double-
buffering (parallel connection).
• Display possible in operating modes other than standby mode
• Choice of 11 frame frequencies
• Built-in power supply split-resistance, supplying LCD drive power
• Use of module standby mode enables this module to be placed in standby mode independently
when not used.
• A or B waveform selectable by software