HD6432646 Hitachi, HD6432646 Datasheet - Page 665

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

18.1
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 of the LCD controller/driver are given below.
Duty Cycle
Static
1/2
1/3
1/4
Display capacity
LCD RAM capacity
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).
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
8 bits 20 bytes (160 bits)
Byte or word access to LCD RAM
With 1/2 duty, parallel connection of COM1 to COM2, and of COM3 to COM4, can be
In static mode, parallel connection of COM1 to COM2, COM3, and COM4 can be used
used
Overview
Features
Section 18 LCD Controller/Driver
H8S/2646, H8S/2646R,
H8S/2645
24 SEG
24 SEG
24 SEG
24 SEG
Internal Driver
H8S/2648, H8S/2648R,
H8S/2647
40 SEG
40 SEG
40 SEG
40 SEG
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