PC F8 536 PC A8 536 NXP LCD driver PCA8536 and PCF8536 I2C/SPI LCD and PWM LED controller for industrial and automotive applications This advanced, highly integrated LCD controller drives up to eight backplanes, up to 44 segments, and up to 320 elements, and provides an on-chip, 6-channel PWM controller for LED illumination. Compatible with most MCUs, it simplifies design, reduces power, and minimizes communication overhead. Key features `` Single-chip 320 segment LCD controller and driver `` 6-channel PWM generator for backlight LED illumination `` AEC Q100 compliant for automotive applications (PCA8536) `` Selectable display bias configuration `` Wide digital supply voltage range: 1.8 to 5.5 V `` Wide LCD supply voltage range: 2.5 to 9.0 V `` Choice of serial interface: I2C (PCx8536AT) or SPI (PCx8536BT) `` Low power consumption `` Operating temp up to 85 °C (PCF8536) or 95 °C (PCA8536) `` Silicon gate CMOS process Applications `` Industrial version (PCF8536) - White goods - Consumer products `` Automotive version (PCA8536) - Car radio - Climate control - Dashboard display The NXP PCx8536 is a peripheral device, equipped with ` a low-power serial interface (I2C- or SPI-bus), that controls and drives almost any LCD display with multiplex rates up to 1:8. The device is available in two types, one for industrial (PCF8536) and one for automotive applications (PCA8536). ` The automotive type supports an extended operating temperature range up to 95 °C, and is AEC Q100 compliant. Both types are also compatible with most microcontrollers and communicate via standard serial interfaces. The AT versions use the two-line bidirectional I2C-bus (400 kHz), while the BT versions use the three-line unidirectional SPI-bus (5 MHz). Communication overheads are minimized by using a 320-bit display RAM with auto-incremented addressing. An on-chip PWM controller for LED backlight illumination ` is included. The PWM has six outputs with 7-bit resolution ` (128 steps) ideal to drive external transistors. Up to six independent channels can be configured. The 128 levels ` per channel allow to control 2 RGB backlights with a spectrum of more than 2 million colors. Each channel can also be used for static LED drive or as logic output. Hz. The reference oscillator is factory calibrated. The device compensates the DC offset voltage across the LCD in line inversion mode, or in frame inversion mode (selectable). The PCx8536 generates the drive signals for any multiplexed LCD containing up to eight backplanes, up to 44 segments, and up to 320 elements. 4, 6, or 8 backplanes can be driven. The 320 segments can include up to 40 seven-segment digits, up to 20 fourteen-segment alphanumeric characters, or any graphic of up to 320 elements. The frame frequency can be programmed in the range of 60 to 300 Hz in steps of 10 The LCD supply range from 2.5 V, for use with low-threshold LCDs, up to 9.0 V for high-threshold TN LCDs. The digital power supply can be from 1.8 to 5.5 V, and the logic supply can be separated from the LCD supply. Also, to avoid flicker of the display, the PWM and LCD frame frequencies can be set independently. Backplane swapping eases PCB design by making it possible to move the backplane and segment outputs from one side to the other. PCx8536AT (I2C version) block diagram PCx8536BT (SPI version) block diagram Integrated PWM controller for LED backlighting and button lighting Ordering information PCx8536 MCU PWM 1 Version VDD1 Package type Easy color mixing VDD2 Interface type For LED Button Lighting Each of the 6 PWM channels can be controlled independently PCA8536AT/Q900/1 Yes I2C-bus TSSOP56 SOT364-1 PCA8536BT/Q900/1 Yes SPI-bus TSSOP56 SOT364-1 PCF8536AT/1 - I2C-bus TSSOP56 SOT364-1 PCF8536BT/1 - SPI-bus TSSOP56 SOT364-1 Type number For LED Backlighting AEC Q100 Compliant PWM Controller VDD3 Larger current / higher voltage NXP BC847 / BC857 PWM 2 PWM 3 PWM 6 www.nxp.com © 2011 NXP Semiconductors N.V. All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The Date of release: November 2011 information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and Document order number: 9397 750 17189 may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof Printed in the Netherlands does not convey nor imply any license under patent- or other industrial or intellectual property rights.