32 Gray Scale Dot Matrix LCD Controller/Driver 1. INTRODUCTION The ST7529 is a driver & controller LSI for 32 gray scale graphic dot-matrix liquid crystal display systems. It generates 255 Segment and 160 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI), 8-bit/16-bit parallel or IIC display data and stores in an on-chip display data RAM. It performs display data RAM read/write operation with no external operating clock to minimize power consumption. In addition, because it contains power supply circuits necessary to drive liquid crystal, it is possible to make a display system with the fewest components. 2. FEATURES Driver Output Circuits On-chip Low Power Analog Circuit −255 segment outputs / 160 common outputs − On-chip oscillator circuit Applicable Duty Ratios − Various partial display − Partial window moving & data scrolling Microprocessor Interface Operating Voltage Range − 8/16-bit parallel bi-directional interface with 6800-series −4-line serial interface (write only) − LCD driving voltage (VLCD = V0 - VSS): 3.76 to 18.0V −9 bit 3-line serial interface (write only) Temperature Gradient Coefficient On-chip Display Data RAM LCD driving voltage (EEPROM) − To store contrast adjustment value for better display Package Type − Application for COG and TCP

ST7529 3. Pad Arrangement Chip Size : 16.550mm x 1.525mm Pad pitch : Com, Seg pad pitch: 43µm IO pad pitch: 110µm Test pin pad pitch: 75µm Pad size : Com, Seg pad size: Pad No1~362 : 25µm (X) x 96µm (Y) Pad No363~390 : 96µm (X) x 25µm (Y) Pad No544~571 : 96µm (X) x 25µm (Y) IO pad pad size: 90µm (X) x 40µm (Y) Test pin pad size: 55µm (X) x 40µm (Y) Bump Height: 17µm Chip Thickness: 635µm

SEGMENT DRIVERS COMMON DRIVERS DATA LATCHES COMMON OUTPUT CONTROLLER CIRCUIT V/F Circuit FRC/PWM FUNCTION CIRCUIT DISPLAY ADDRESS COUNTER ADDRESS COUNTER DATA REGISTER INSTRUCTION REGISTER VLCDin VLCDout INSTRUCTION DECODER TIMING GENERATOR DISPLAY DATA RAM (DDRAM) [160X255X5]

I/O Supply Power supply for logic circuit Supply Power supply for OSC circuit Supply Power supply for Booster Circuit Supply Power supply for LCD Supply Ground. Ground system should be connected together. If the internal voltage generator is used, the VLCDIN & VLCDOUT must be connected together. If an external supply is used, this pin must be left open. An external LCD supply voltage can be supplied using the VLCDIN pad. In this case, VLCDOUT has to be Supply left open, and the internal voltage generator has to be programmed to zero. (SET register VB=0) LCD driver supply voltages V0In & V0out...

ST7529 6.3 SYSTEM CONTROL Name TCAP T[0]~T[10] Description Test pin. Leave it open. Test pin. Leave it open.

ST7529 6.4 MICROPROCESSOR INTERFACE Name Reset input pin When RST is “L”, initialization is executed. Chip select input pins Data/instruction I/O is enabled only when XCS is "L". When chip select is non-active, DB0 to DB15 may be high impedance. Parallel / Serial data input select input IF1 IF2 IF3 MPU interface type H H H L L L Description M0,M1 must be fixed to VSS. This pin is reserved for internal setting. Read / Write control input pin RW = “H” : read RW = “L” : write Write enable clock input pin The data on DB0 to DB15 are latched at the rising edge of the /WR signal. Read / Write execution...

ST7529 6.5 LCD DRIVER OUTPUTS Name Description LCD segment driver outputs The display data and the M signal control the output voltage of segment driver. Segment driver output voltage Display data M (Internal) Normal display Reverse display H H L L Power save mode LCD common driver outputs The internal scanning data and M signal control the output voltage of common driver. Scan data M (Internal) Common driver output voltage O H L H L Power save mode

ST7529 7. FUNCTIONAL DESCRIPTION 7.1 MICROPROCESSOR INTERFACE Chip Select Input The XCS pin is for chip selection. The ST7529 can function with an MPU when XCS is "L". In case of serial interface, the internal shift register and the counter are reset. 7.1.1 Selecting Parallel / Serial Interface ST7529 has seven types of interface with an MPU, which are four parallel and three serial interfaces. This parallel or serial interface is determined by IF pin as shown in table 7.1.1. Table 7.1.1 Parallel / Serial Interface Mode IF1 IF2 IF3 Interface type H H H 80 serial 16-bit parallel H H L 80 serial...

A single pixel of data is read after the second write operation as shown, and it is written in the display RAM. “X” are dummy bits, which are ignored for display. 7.1.3 8-bit (4 line) and 9-bit (3 line) Serial Interface The 8-bit serial interface uses four pins XCS, SI, SCL, and A0 to enter commands and data. Meanwhile, the 9-bit serial interface uses three pins XCS, SI and SCL for the same purpose. Data read is not available in the serial interface. The entered data must be 8 bits. Refer to the following chart for entering commands, parameters or gray-scale data. The relation between gray-scale...

ST7529 (1) 8-bit serial interface (4 line) th When entering data (parameters): A0= HIGH at the rising edge of the 8 SCL. When entering command: A0= LOW at the rising edge of the 8 SCL (2) 9-bit serial interface (3 line) st When entering data (parameters): SI= HIGH at the rising edge of the 1 SCL. When entering command: SI= LOW at the rising edge of the 1 SCL.

ST7529 If XCS is set to HIGH while the 8 bits from D7 to D0 are entered, the data concerned is invalid. Before entering succeeding sets of data, you must correctly input the data concerned again. In order to avoid data transfer error due to incoming noise, it is recommended to set XCS at HIGH on byte basis to initialize the serial-to-parallel conversion counter and the register. th When executing the command RAMWR, set XCS to HIGH after writing the last address (after starting the 9 pulse in th case of 9-bit serial input or after starting the 8 pulse in case of 8-bit serial input).