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Section 18 LCD Controller/Driver
18.1
Overview
The H8S/2646 Series has an on-chip segment type LCD control circuit, LCD driver, and power
supply circuit, enabling it to directly drive an LCD panel.
18.1.1
Features
Features of the LCD controller/driver are given below.
•
Display capacity
Internal Driver
Duty Cycle
H8S/2646, H8S/2646R,
H8S/2645
H8S/2648, H8S/2648R,
H8S/2647
Static
24 SEG
40 SEG
1/2
24 SEG
40 SEG
1/3
24 SEG
40 SEG
1/4
24 SEG
40 SEG
•
LCD RAM capacity
8 bits
×
20 bytes (160 bits)
Byte or word access to LCD RAM
•
The segment output pins can be used as ports in groups of four.
•
Common output pins not used because of the duty cycle can be used for common double-
buffering (parallel connection).
With 1/2 duty, parallel connection of COM1 to COM2, and of COM3 to COM4, can be
used
In static mode, parallel connection of COM1 to COM2, COM3, and COM4 can be used
•
Choice of 11 frame frequencies
•
A or B waveform selectable by software
•
Built-in power supply split-resistance
•
Display possible in operating modes other than standby mode and module stop mode
Summary of Contents for H8S/2645
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