ST
Sitronix
ST7528
16 Gray Scale
Dot Matrix LCD Controller/Driver
Ver 1.1
1/92 2003/12/15
INTRODUCTION
The ST7528 is a driver & controller LSI for 16-level gray scale graphic dot-matrix liquid crystal display systems. It contains
2 Mode (160X100,132X128) for Segment and Common driver circuits. This chip is connected directly to a microprocessor,
accepts Serial Peripheral Interface (SPI),IIC or 8-bit parallel display data and stores in an on-chip display data RAM of 160
x 129 x 4 bits. 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.
FEATURES
16-level (White Mode ~ Dark Mode) Gray Scale Display with PWM and FRC Methods
DDRAM data [ 4n : 4n+3 ]
4n
4n + 1
4n + 2
4n+ 3
Gray Scale
0 0 0 0
White
Mode
0
0
0
1
Gray Level 1
0
0
1
0
Gray Level 2
: : : :
:
: : : :
:
1
1
0
1
Gray Level 13
1
1
1
0
Gray Level 14
1 1 1 1
Dark
(Mode0: Accessible column address, n = 0, 1, 2, ......, 129, 130, 131)
(Mode1: Accessible column address, n = 0, 1, 2, ......, 157, 158, 159)
Driver Output Circuits
-Mode 0 : 132 segment outputs / 128+1 common outputs (16-level gray scale)
-Mode 1: 160 segment outputs / 100+1 common outputs (16-level gray scale)
Applicable Duty Ratios
- Various partial display
- Partial window moving & data scrolling
On-chip Display Data RAM
- Capacity: 129 160 4 = 82,560 bits
-16-Gray Level display dot is illuminated by 4 bit data control
ST7528
Ver 1.1
2/92 2003/12/15
Microprocessor Interface
- 8-bit parallel bi-directional interface with 6800-series or 8080-series
- 4-line serial interface (4-line-SIF)
- 3-line serial interface (3-line-SIF)
- IIC serial interface
On-chip Low Power Analog Circuit
- On-chip oscillator circuit
- Voltage converter (x3, x4, x5 or x6)
- Voltage regulator (temperature coefficient: -0.125%/C, or external input)
- On-chip electronic contrast control function (64 steps X 8 )
- Voltage follower (LCD bias: 1/5 to 1/12)
Operating Voltage Range
- Supply voltage (VDD): 1.8 to 3.3V
- LCD driving voltage (VLCD = V0 - VSS): 4.0 to 15.0 V
Package Type
- Application for COG
ST7528
6800 , 8080 ,
4-Line , 3-Line interface
(without IIC interface)
ST7528i IIC
interface
ST7528
Ver 1.1
3/92 2003/12/15
ST7528 Pad Arrangement (COG)
Chip Size: 12,575 um 1,220 um
Bump Pitch:
PAD NO 1 ~ 229, 353 ~ 385: 55 um (COM/SEG), PAD NO 230 ~ 352: 75 um (I/O) [PAD 338~339: 81um],
PAD NO 229 ~ 230: 84 um, PAD NO 352 ~ 353: 913 um
Bump Size:
PAD NO 1 ~ 196, 218 ~ 229, 353 ~ 364 : 35(x) um 96(y) um PAD NO 197 ~ 217, 365 ~ 385 : 96(x) um 35(y) um
PAD NO 230 ~ 352 : 55(x)um 60(y) um
Bump Height: 18 um (Typical)
Chip Thickness: 635 um
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