Advance Information
256KB Embedded Display SRAM LCD Graphic Controller




The SSD1906 is a graphic controller with built-in 256Kbyte SRAM display buffer, supporting color and mono LCD.  The SSD1906 can support a wide range of active and passive panels and interface with various CPUs. The advanced design, together with integrated memory and timing circuits produces a low cost, low power, single chip solution for handheld devices or appliances, including Pocket/Palm-size PCs and mobile communication devices.

The SSD1906 supports most of the common resolutions for portable applications and features hardware display rotation, covering various form factor requirements. The controller also features Virtual Display, Floating Window (variable size Overlay Window) and two Cursors to reduce the software manipulation. The 32-bit internal data path provides high bandwidth display memory for fast screen updates and the SSD1906 also provides the advantage of a single power supply.

The SSD1906 features low-latency CPU access, supporting microprocessors without RDY#/WAIT# handshaking signals. This impartiality to CPU type or operating system makes the controller an ideal display solution for a wide variety of applications.

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  • Integrated Display Buffer

– Embedded 256K byte SRAM display buffer


  • CPU Interface

Directly interfaces to:

– Generic #1 bus interface with WAIT# signal

– Generic #2 bus interface with WAIT# signal

– Intel StronARM / XScale

– Motorola MX1 Dragonall

– Motorola MC68K

– Motorola DragonBall MC68EZ328/MC68VZ328

– Hitachi SH-3

– Hitachi SH-4

  • 8-bit processor support with “glue logic”
  • “Fixed” and low-latency CPU access times
  • Registers are memory-mapped which dedicated M/R# input, which selects between memory and register address space
  • The contiguous 256K byte display buffer is directly accessible through the 18-bit address bus


  • Display Support

– 4/8-bit monochrome STN interface

– 4/8-bit color STN interface

– 9/12/18-bit Active Matrix TFT interface

– Direct support for 18-bit Sharp HR-TFT interface (160×160, 320×240)


  • Display Modes

– 1/2/4/8/16 bit-per-pixel (bpp) color depths

– Up to 64 gray shades using Frame Rate Control (FRC) and dithering on monochrome passive LCD panels

– Up to 262k colors on passive STN panels

– Up to 262k colors on active matrix LCD panels


Resolution examples:

320×240 at a color depth of 16 bpp

160×160 at a color depth of 16 bpp

160×240 at a color depth of 16 bpp


  • Display Features

– Display Rotate Mode : 90°, 180°, 270° counter-clockwise hardware rotation of display image

– Virtual display support : displays image larger than the panel size using panning and scrolling

Floating Window Mode : displays a variable size window overlaid on the background image

2 Hardware Cursors (for 4/8/16 bpp) : simultaneously displays two cursors overlaid on the background image

– Double Buffering/Multi-pages: provides smooth animation and instantaneous screen updates


  • Clock Source

– Two clock inputs: CLKI and AUXCLK, but possible to use one clock input only

– Bus clock (BCLK) is derived from the CLKI and can be internally divided by 2, 3, or 4

– Memory clock (MCLK) is derived from the BCLK and can be internally divided by 2, 3, or 4

– Pixel clock (PCLK) can be derived from CLKI, AUXCLK, BCLK, or MCLK and can be internally divided by 2, 3, 4, or 8


  • Miscellaneous

– Harware/Software Color Invert

– Software Power Saving mode

– General Purpose Input / Output pins available

– Single Supply Operation: 3.0V – 3.6V


Ordering Information

Ordering Part No. SSD1906
Package TQFP-100
Remarks N/A
Ordering Part No. Package Remarks
SSD1906 TQFP-100 N/A