Introduction

The ST7732 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 396 source line and 162 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial Peripheral Interface (SPI), 8-bits/9-bits/16-bits/18-bits parallel interface. Display data can be stored in the on-chip display data RAM of 132 x 162 x 18 bits. It can perform display data RAM read/write operation with no external operation clock to minimize power consumption. In addition, because of the integrated power supply circuits necessary to drive liquid crystal, it is possible to make a display system with fewer components.

Features

◆ Single chip TFT-LCD controller/driver with display data RAM

◆ Display resolution: 132 (H) x RGB x 162 (V)

◆ Display data RAM (frame memory): 132 x 162 x 18-bits = 384,912 bits

◆ Output:

- 396 ch source outputs (132RGB)

- 162 ch gate outputs

- Common electrode output

◆ Display mode (color mode)

- Full color mode (idle mode off): 262K-colors

- Reduce color mode (idle mode on): 8-colors (1-bit for individual R, G, B color depth)

◆ Display resolution option

- 128 x 160 display with 128 x 18-bits x 160 display RAM

- 120 x 160 display with 120 x 18-bits x 160 display RAM

- 132 x 162 display with 132 x 18-bits x 162 display RAM

◆ Supported LC type option

- Transflective (TR) LC type (When LCM1,LCM0 = “00”)

- Transmissive (TM) LC type (When LCM1,LCM0 = “01”)

- Low voltage (LV) LC type (When LCM1,LCM0 = “10”)

- MVA LC type (When LCM1, LCM0 = “11”)

◆ Supported data format on display host interface

- 12-bits/pixel: RGB= (444) using the 384k-bits frame memory and LUT

- 16-bits/pixel: RGB= (565) using the 384k-bits frame memory and LUT

- 18-bits/pixel: RGB= (666) using the 384k-bits frame memory

◆ Supported MCU Interface

- 3-line serial interface

- 4-line serial interface

- 8-bits, 9-bits, 16-bits, 18-bits interface with 8080-series MCU

- 8-bits, 9-bits, 16-bits, 18-bits interface with 6800-series MCU

- 6-bits, 16-bits, 18-bits RGB interface with graphic controller

◆ Display features

- Area scrolling

- Partial display mode

- Software programmable color depth mode

◆ Build-in circuit

- DC/DC converter

- Adjustable VCOM generation

- Non-volatile (NV) memory to store initial register setting

- Oscillator for display clock generation

- Timing controller

- supporting transflective, transmissive, low voltage, MVA type LC

- Factory default value (module ID, module version, etc) are stored in NV memory

- Line inversion, frame inversion

◆ NV Memory

- 7-bits for ID2

- 8-bits for ID3

- 7-bits for VCOM adjustment

◆ Supply voltage range

- Analog supply voltage range for VDD to AGND: 2.5V to 3.3V

- I/O supply voltage range for VDDI to DGND: 1.6V to 3.3V

◆ Output voltage level

- Source output voltage range (GVDD to AGND): 3.0V to 5.0V

- Power supply range for driver circuit (AVDD to AGND): 4.55V to 6.0V

- Output range of HIGH level of VCOM (VCOMH to AGND): 2.5V to 5.0V

- Output range of LOW level of VCOM (VCOML to AGND): -2.5V to 0.0V

- Output range of HIGH level of gate driver (VGH to AGND): +9.4V to 16.2V

- Output range of LOW level of gate driver (VGL to AGND): -13.5V to –7.0V

◆ Lower power consumption, suitable for battery operated systems

- CMOS compatible inputs

- Optimized layout for COG assembly

- Operate temperature range: -30 to + ℃ 70℃