emWin: LCD13700 driver

Supported hardware

Controllers

This driver has been tested with the following LCD controllers

Epson S1D13700 controller

Bits per pixel

Currently supported color depth is 2 bpp.

Interfaces

8-bit parallel (simple bus) bus interface is supported, which is labeled "Generic Bus Indirect" in the Epson documentation.

Display data RAM organization

The picture above shows the relation between the display memory and the SEG and COM lines of the display.

Additional RAM requirements of the driver

This driver can be used with or without a display data cache. The data cache contains a complete copy of the contents of the display data RAM. If a cache is not used, there are no additional RAM requirements. It is recommended to use this driver with a data cache for faster display RAM access. Not using a cache degrades the performance of this driver. The amount of memory used by the cache can be calculated as follows: Size of RAM (in bytes) = ((LCD_XSIZE * LCD_BITSPERPIXEL + 7) / 8) * LCD_YSIZE

Additional driver functions

None.

Hardware configuration

This driver accesses the hardware with a simple bus interface. The following table lists the macros which must be defined for hardware access:

Macro	Explanation
LCD_INIT_CONTROLLER	Initialization sequence for the LCD controller.
LLCD_READ_A1	Read a word from display controller with A-line high.
LCD_WRITE_A0	Write a word to display controller with A-line low.
LCD_WRITE_A1	Write a word to display controller with A-line high.
LCD_WRITEM_A1	Write multiple words to display controller with A-line high.

Additional configuration switches

The following table shows optional configuration switches available for this driver:

Macro	Explanation
LCD_CACHE	When set to 0, no display data cache is sed, which slows down the speed of the driver. Default is 1 (cache activated).

Special requirements

None.