Description
The HD61830/HD61830B is a dot matrix liquid crystal graphic display controller LSI that stores the display data sent from an 8-bit microcontroller in the external RAM to generate dot matrix liquid crystal driving signals.

Features
• Dot matrix liquid crystal graphic display controller
• Display control capacity
    - Graphic mode: 512k dots (216 bytes)
    - Character mode: 4096 characters (212 characters)
• Internal character generator ROM: 7360 bits
    - 160 types of 5 × 7 dot characters
    - 32 types of 5 × 11 dot characters Total 192 characters
    - Can be extended to 256 characters (4 kbytes max.) with external ROM
• Interfaces to 8-bit MPU
• Display duty cycle (can be selected by a program) Static to 1/128 duty cycle
• Various instruction functions
    - Scroll, cursor on/off/blink, character blink, bit manipulation
• Display method: Selectable A or B types
• Internal oscillator (with external resistor and capacitor) HD61830
• Operating frequency
    - 1.1 MHz HD61830
    - 2.4 MHz HD61830B
• Low power dissipation
• Power supply: Single +5 V ±10%
• CMOS process