RA8873M

Specifications

RA8873M Brief Description:

RA8873M is a low-cost color controller developed for small and medium-size TFT LCDs. It has built-in buffer RAM and supports 8080/6800 8/16-bit asynchronous parallel interfaces as well as SPI and IIC serial interfaces.

RA8873M also provides many built-in functions that reduce the host system’s display load while delivering a high-performance display solution. These include Multiple Display Buffers, Picture-in-Picture (PIP), opacity/transparency control, a Geometric Drawing Engine, built-in/external text display, DMA for external image loading, Block Transfer Engine (BTE), and display rotation/mirroring.

RA8873M Hardware Architecture:

RA8873M Main Features:

(1) Host Interface

• Supports 8080/6800 8/16-bit asynchronous parallel interface (MIPI DBI Type A)
• Provides Xnwait signal for extended MPU cycles for handshaking
• Supports serial host interface, e.g., IIC, 3/4-wire SPI
• Supports mirror and rotation functions for image data writing

(2) Input Display Data Format

• 1bpp: Monochrome (1-bit/pixel)
• 8bpp: RGB 3:3:2 (1-byte/pixel)
• 16bpp: RGB 5:6:5 (2-byte/pixel)
• 24bpp: RGB 8:8:8 (3-byte/pixel or 4-byte/pixel)
       Index 2:6 (64 indexed colors/pixel with transparency attribute)
       αRGB 4:4:4:4 (4096 indexed colors/pixel with transparency attribute)

(3) Display Mode

• User can set 24/18/16-bit TFT display output mode
• Supports screen resolution 800x480, 480x800, 16bpp
• Supports screen resolution 640x480, 480x640, 24bpp

(4) Graphics Processing Functions

• Picture-in-picture (PIP): Supports two PIP windows
• Flip display: Horizontal/vertical flip display function only applies to display, does not affect read/write of other functional blocks
• Geometric drawing: Supports drawing points, lines, curves, circles, ellipses, triangles, rectangles, rounded rectangles
• Block Transfer (BTE): Copy data with raster operations and color expansion, blend transparency, solid color extraction, graphic blend transparency, pixel blend transparency

(5) Text Functions

• Built-in ISO/IEC 8859-1/2/4/5. 8x16, 12x24, 16x32
• Supports Jietong serial font ROM
• Supports vertical and horizontal font magnification 2~4 times
• Supports text rotation by 90 degrees

(6) DMA Function

• Supports copying data from external serial flash to frame buffer

(7) Key Interface

• Supports 5x5 keyboard (multiplexed with GPIO pins)
• Scan cycle programmable
• Supports long press and repeat keys
• Supports pressing two or three keys simultaneously
• Supports keyboard wake-up function

(8) PWM and Timer

• Built-in two 16-bit counters
• One 8-bit prescaler and one 4-bit frequency divider
• Output waveform duty cycle is programmable
• Auto-reload mode or one-shot mode
• Dead-zone protection

(9) Power Saving Modes

• Supports 3 power saving modes
• Standby, Suspend, and Sleep modes
• Can be woken up by host, key press, or external event
• Wake-up display: If wake-up display effect is enabled, it can quickly display display data pre-stored in SDRAM upon wake-up

(10) Clock

• Built-in programmable PLL
• Single crystal oscillator 10~15MHz
• Internal core maximum system frequency 80MHz
• SDRAM maximum frequency: 80MHz
• LCD maximum scan frequency: 40MHz

(11) Power Supply: 3.3V

(12) Operating Temperature: -40℃~85℃

(13) Package: LQFP-128