HX8302A
396 channel, 65536 color TFT
source driver with internal RAM
April 2003, Version 1.0
1. General Description
HX8302A is a 396-channel source driver LSI with internal RAM for maximum 132RGB-by-176-dot
graphics on TFT displays in 65536 colors. It is for driving TFT color LCD displays in combination with
the gate driver/power IC (HX8609A). With internal bit-operation functions, 16-bit high-speed bus
interface, and high-speed RAM-write functions enable efficient data transfer and high-speed rewriting of
data to the graphics RAM.
HX8302A has various functions for reducing the power consumption of an LCD system and has a
low-voltage operation (1.8V min.) with an internal RAM to display a maximum of 132RGB-by-176-dot
color. Since HX8302A incorporates a circuit that interfaces with the HX8609A, it can set instructions to
HX8609A. In addition, moderate power control can be achieved by combining these hardware functions
with software functions, such as a partial display, 8-color display mode, sleep and standby modes. This
LSI is suitable for any medium-sized or small portable battery-driven product requiring long-term driving
capabilities, such as digital cellular phones, bi-directional pagers, and small PDAs.
2. Features
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132RGB x 176-dot graphics display LCD controller/driver for 65536 TFT colors (when used with
HX8609A gate driver LSI).
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16-/8-bit high-speed bus interface and serial data transfer interface.
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High-speed burst-RAM write function.
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Writing to a window-RAM address area by using a window-address function
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Bit-operation functions for graphics processing:
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Write-data mask function in bit units
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Logical operation in pixel unit and conditional write function
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Various color-display control functions:
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65536 possible colors can be displayed at the same time (gamma adjust function included).
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Vertical scroll display function in line units.
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Low-power consumption architecture supports:
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Vcc = 1.8 to 3.3 V (corresponding low-voltage operation)
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VDH = 4.5 to 5.5 V (low liquid crystal drive voltage)
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Power-save functions such as the standby mode and sleep mode.
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Partial LCD drive of two display windows in any position
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Maximum 6-times step-up circuit for liquid crystal drive voltage (HX8609A)
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Built-in circuit for interfacing with the corresponding gate driver / power IC (HX8609A).
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Maximum 132RGB-by-176-dot display in combination with the gate driver / power supply IC.
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Internal RAM capacity: 46,464 bytes.
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396-channel liquid crystal display driver embedded.
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n-line inversion AC liquid-crystal drive .
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Scan direction change of source driver.
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Internal oscillation and hardware reset.
Version 1.0
Himax
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Technologies, Inc.
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