ST7533
33C x 96S Dot Matrix LCD Controller/Driver
Product Description
The ST7533 is a single-chip dot matrix LCD drivers that can be connected directly to a microprocessor bus. 8-bit parallel or serial display data sent from the microprocessor is stored in the internal display data RAM and the chip generates a LCD drive signal independent of the microprocessor. Because the chips in the ST7533 contain 33x96 bits of display data RAM and there is a 1-to-1 correspondence between the LCD panel pixels and the internal RAM bits, these chips enable displays with a high degree of freedom.
The ST7533 chips contain 33 common output circuits and 96 segment output circuits, so that a single chip can drive a 33x96 dot display (capable of displaying 8 columnsx4 rows of a 16x16 dot kanji font).
Moreover, the capacity of the display can be extended through the use of master/slave structures between chips. The chips are able to minimize power consumption because no external operating clock is necessary for the display data RAM read/write operation.
Furthermore, because each chip is equipped internally with a low-power LCD driver power supply, resistors for LCD driver power voltage adjustment and a display clock CR oscillator circuit, the ST7533 can be used to create the lowest power display system with the fewest components for high-performance portable devices.
Features - Direct display of RAM data through the display data RAM.
- RAM capacity : 33 x 96 = 3168 bits
- Display duty selectable by select pin
- 1/33 duty : 33 common x 96 segment
- 1/17 duty : 17 common x 96 segment
- High-speed 8-bit MPU interface (The chip can be connected directly to the both the 80x86 series MPUs and the 68000 series MPUs) /Serial interfaces are supported.
- Abundant command functions Display data Read/Write, display ON/OFF, Normal/ Reverse display mode, page address set, display start line set, column address set, status read, display all points ON/OFF, LCD bias set, electronic volume, read/modify/write, segment driver direction select, power saver, static indicator, common output status select, V5 voltage regulation internal resistor ratio set.
- Static drive circuit equipped internally for indicators. (1 system, with variable flashing speed.)
- Low-power liquid crystal display power supply circuit equipped internally.
Booster circuit (with Boost ratios of 2X/3X/4X , where the step-up voltage reference power supply can be input externally). High-accuracy voltage adjustment circuit (Thermal gradient -0.15%/¢XC ) V5 voltage regulator resistors equipped internally, V1 to V4 voltage divider resistors equipped internally, electronic volume function equipped internally, voltage follower.
- CR oscillator circuit equipped internally (external clock can also be input)
- Extremely low power consumption Operating power when the built-in power supply is used (an example)
70uA (VDD - VSS = VDD - VSS2 =3.0 V, Quad voltage, V5 - VDD = - 11.0 V). Conditions: When displays pattern OFF and the normal mode is selected.
- Power supply operate on the low 1.8 voltage Logic power supply VDD - VSS = 1.8V to 3.3V (+10% Range)
Boost reference voltage: VDD - VSS2 = 1.8V to 3.3V Booster maximum voltage limited
VOUT= -13V (+10% Range)
Liquid crystal drive power supply:
VDD - V5 = 4.0V to 13.0 V
- Wide range of operating temperatures: -40 to 85¢XC
- CMOS process
- These chips not designed for resistance to light or resistance to radiation.
Gold bumped chip available
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