特性

• Key input function for up to 35 keys (A key scan is performed only when a key is pressed.)
• Controls and drives a 5x7 or 5x8 dot matrix LCD.
• Supports accessory display segment drive (up to 65 segments)
• Display technique: 1/8 duty 1/4 bias drive (5x7 dots)1/9 duty 1/4 bias drive (5x8 dots)
• Display digits: 13 digits1 line (5x7 dots), 12 digits1 line (5x8 dots)
• Display control memoryCGROM: 240 characters (5x7 or 5x8 dots)CGRAM: 16 characters (5x7 or 5x8 dots)ADRAM: 13x5 bitsDCRAM: 52x8 bits
• Instruction function
• Sleep mode can be used to reduce current drain.
• Built-in display contrast adjustment circuit
• Switching between key scan output and general-purpose output ports can be controlled with instructions.
• PWM output for adjusting the LED backlight brightness
• The frame frequency of the common and segment output waveforms can be controlled by instructions.
• Serial data control of switching between the RC oscillator operating mode and external clock operating mode.
• Independent LCD driver block power supply VLCD
• A voltage detection type reset circuit is provided to initialize the IC and prevent incorrect display.
• The INH pin is provided. This pin turns off the display, disables key scanning, and forces the general-purposeoutput ports to the low level.
• RC oscillator circuit