h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 671

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

18.1
The H8S/2646 Group 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.
• 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-
• 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
• Module stop mode
Duty Cycle
Static
1/2
1/3
1/4
 8 bits × 20 bytes (160 bits)
 Byte or word access to LCD RAM
buffering (parallel connection).
 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
 As the initial setting, LCD operation is halted. Access to registers and LCD RAM is
used
enabled by clearing module stop mode.
Overview
Features
Section 18 LCD Controller/Driver
H8S/2646, H8S/2646R,
H8S/2645
24 SEG
24 SEG
24 SEG
24 SEG
Rev. 5.00 Sep 22, 2005 page 645 of 1136
Internal Driver
Section 18 LCD Controller/Driver
H8S/2648, H8S/2648R,
H8S/2647
40 SEG
40 SEG
40 SEG
40 SEG
REJ09B0257-0500