pt6530-lcd driver 驱动ic

the pt6530 are 1/3 duty and 1/4 duty lcd display drivers that can directly drive up to 300 segments and can control up to eight general-purpose output ports. these products also incorporate a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.

features
• key input function for up to 30 keys (a key scan is performed only when a key is pressed.)
• 1/3 duty and 1/4 duty drive schemes can be controlled from serial data.
• 1/2 bias and 1/3 bias drive schemes can be controlled from serial data.
• capable of driving up to 228 segments using 1/3 duty and up to 300 segments using 1/4 duty.
• sleep mode and all segments off functions that are controlled from serial data.
• segment output port/general-purpose output port function switching that is controlled from serial data.
• serial interface for clock, data input, data output, strobe pins.
• direct display of display data without the use of a decoder provides high generality.
• independent vlcd for the lcd driver block (vlcd can be set to in the range vdd – 0.5 to 6.0v)
• provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.
• res pin provided for forcibly initializing the ic internal circuits.
• rc oscillator circuit.