80 X 128 Pixels Matrix LCD Driver
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The PCF8811 is a low-power CMOS LCD controller and driver. It is designed to drive a graphic display of 80 rows and 128 columns or of 79 rows, 128 columns, and an icon row of 128 symbols. All necessary functions for the display are provided in a single chip, including on-chip generation of the LCD supply and bias voltages. Therefore only a minimum of external components are required and power consumption is low. The PCF8811 can interface microcontrollers via a parallel bus, serial bus, or I²C-bus interface.
製品詳細
Features
Key Features
- Single-chip LCD controller and driver
- 80 row and 128 column outputs
- Display data RAM 80 × 128 bit
- 128 icons (in extended command set row 79 can be configured for displaying icons)
- Low power consumption; suitable for battery operated systems
- Configurable voltage multiplier generating LCD supply voltage VLCD; an external VLCD is also possible
- Programmable bottom row pins mirroring; for compatibility with both Tape Carrier Packages (TCP) and Chip-On-Glass (COG) applications (extended command set)
- Status read, which allows for chip recognition and content checking of some registers
- Start address line which allows, for instance, the scrolling of the displayed image
- Programmable display RAM pointers for variable display sizes
- Slim chip layout, suited for COG applications
- Temperature range: Tamb = ‑40 °C to +85 °C
- CMOS compatible inputs
Interfaces
- 8-bit parallel
- 3- or 4-line serial peripheral interface (SPI)
- High-speed I²C-bus
- Generation of intermediate LCD bias voltage
- Oscillator requires no external components
- OTP calibration for VLCD and accurate frame frequency
- External reset input pin
- External clock input possible
Linear Temperature Compensation of VLCD
- 8 programmable temperature coefficients (extended command set)
- one fixed temperature coefficient which can be set as default by OTP programming (basic command set)
Multiplex Rate 1:16 to 1:80 Selectable
- In steps of 8 when icon row is not used
- In steps of 16 when the icon row is used
Logic Supply Voltage Range VDD1 to VSS
- 1.7 V to 3.3 V
High-Voltage Multiplier Supply Voltage Range VDD2, VDD3 to VSS
- 1.8 V to 3.3 V
Display Supply Voltage Range VLCD to VSS
- 3 V to 9 V