特性

• Key input function for up to 30 keys (A key scan is performed only when a key is pressed.)
• 1/4 duty 1/3 bias and 1/3 duty 1/3 bias drive schemes can be controlled from serial data.
• Capable of driving up to 224 segments using 1/4 duty and up to 171 segments using 1/3 duty.
• Switching between key scan output and segment output can be controlled from serial data.
• The key scan operation enabled/disabled state can be controlled from serial data.
• Switching between segment output port and general-purpose output port can be controlled from serial data.
• Switching between general-purpose output port, clock output port, and segment output port can be controlled fromserial data. (Up to 5 general-purpose output ports and up to one clock output port)
• Serial data I/O supports CCB format communication with the system controller. (Support 3.3V and 5V operation)
• Sleep mode and all segments off functions that are controlled from serial data.
• The frame frequency of the common and segment output waveforms can be controlled from serial data.
• Switching between RC oscillator operating mode and external clock operationg mode can be controlled from serial data.
• Direct display of display data without the use of a decoder provides high generality.
• Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.
• RES pin provided for forcibly initializing the IC internal circuits.