LCD Driver for Low Multiplex Rates

Overview

The PCA85232 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 multiplexed LCD containing up to four backplanes and up to 160 segments. It can easily be cascaded for larger LCD applications. The PCA85232 is compatible with most microcontrollers and communicates via the two-line bidirectional I²C-bus. Communication overheads are minimized by a display RAM with auto-incremental addressing, by hardware subaddressing, and by display memory switching (static and duplex drive modes).

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Features

AEC-Q100 compliant for automotive applications
Single-chip LCD controller and driver for up to 640 elements
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
160 segment drives:
- Up to 80 7-segment numeric characters
- Up to 40 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 the range of 117 Hz to 176 Hz; factory calibrated
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: I_DD = 4 μA, I_DD(LCD) = 65 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
No external components
Two sets of backplane outputs for optimal COG configurations of the application

MoreLess

Features

AEC-Q100 compliant for automotive applications
Single-chip LCD controller and driver for up to 640 elements
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
160 segment drives:
- Up to 80 7-segment numeric characters
- Up to 40 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 the range of 117 Hz to 176 Hz; factory calibrated
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: I_DD = 4 μA, I_DD(LCD) = 65 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
No external components
Two sets of backplane outputs for optimal COG configurations of the application

Data Sheets

Application Notes

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PCA85232U: LCD Driver for Low Multiplex Rates

Overview

Features

Features