The PCF8532 is a peripheral device which interfaces to almost any Liquid Crystal Display(LCD) with low multiplex rates. It generates the drive signals for any static or multiplexedLCD containing up to four backplanes and up to 160 segments. It can easily be cascadedfor larger LCD applications. The PCF8532 is compatible with most microcontrollers andcommunicates via the two-line bidirectional I²C-bus. Communication overheads areminimized by a display RAM with auto-incremental addressing, by hardwaresubaddressing, and by display memory switching (static and duplex drive modes).
Not to be used for new designs. Replacement part is PCF85132U/2DA/1 for industrial andPCA85132U/2DA/Q1 for automotive applications.
Feature
- Single-chip LCD controller and driver for up to 640 elements
- Selectable backplane drive configuration: static or 2, 3 or 4 backplane multiplexing
- 160 segment drives:
- Up to 80 7-segment numeric characters
- Up to 42 14-segment alphanumeric characters
- Any graphics of up to 640 elements
- May be cascaded for large LCD applications (up to 5120 elements possible)
- 160 × 4-bit RAM for display data storage
- Software programmable frame frequency in steps of 5 Hz in the range of 60 Hz to 90 Hz
- Wide LCD supply range: from 1.8 V for low threshold LCDs and up to 8.0 V for guest-host LCDs and high threshold (automobile) twisted nematic LCDs
- Internal LCD bias generation with voltage-follower buffers
- Selectable display bias configuration: static, 1/2 or 1/3
- Wide power supply range: from 1.8 V to 5.5 V
- LCD and logic supplies may be separated
- Low power consumption, typical: IDD = 4 μA, IDD(LCD) = 30 μA
- 400 kHz I²C-bus interface
- Auto-incremental display data loading across device subaddress boundaries
- Versatile blinking modes
- Compatible with Chip-On-Glass (COG) technology
- Two sets of backplane outputs for optimal COG configurations of the application
- Display memory bank switching in static and duplex drive modes
- No external components required
- Manufactured in silicon gate CMOS process
