PCF8545 Description
The PCF8545 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD)1 with low multiplex rates. It generates the drive signals for any multiplexed LCD containing up to eight backplanes, and up to 320 elements. The PCF8545 is patible with most microcontrollers and municates via the two-line bidirectional I2C-bus (PCF8545A) or a three line unidirectional SPI-bus (PCF8545B).
PCF8545 Key Features
- Single-chip 320 elements LCD controller and driver
- Wide range for digital power supply: from 1.8 V to 5.5 V
- LCD supply range from 2.5 V up to 5.5 V
- LCD and logic supplies may be separated
- Low power consumption
- Selectable backplane drive configuration: 4, 6, or 8 backplane multiplexing
- Selectable display bias configuration
- 320-bit RAM for display data storage
- 400 kHz I2C-bus interface (PCF8545A)
- 5 MHz SPI-bus interface (PCF8545B)