Section 13 LCD Controller/Driver
13.1
Overview
The H8/3887 Series 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
1. Features
Features of the LCD controller/driver are given below.
•
Display capacity
Duty Cycle
Static
1/2
Internal Driver
40 seg
Segment External Expansion Driver
256 seg
128 seg
64 seg
64 seg
40 seg
1/3
40 seg
1/4
40 seg
•
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.
•
Built-in step-up constant-voltage (5 V) power supply allows LCD display even at low voltages
(H8/3887 Series).
343
ETC [ ETC ]
