Page 10
Epson Research and Development
Vancouver Design Center
S1D13504
Programming Notes and Examples
X19A-G-002-07
Issue Date: 01/02/01
2.2.2 Initialization Example
This section presents an example of how to initialize the S1D13504 registers.
Example 1: Initialize the registers for a 16 color 640x480 dual passive LCD using a 16 bit
data interface; assume 2M byte of display buffer.
Program the S1D13504 registers in the following order with the data supplied. Note that for this
example, it is assumed that the arrays “unsigned char RED[16], GREEN[16], BLUE[16]” are
defined and initialized for the required colors. For example, RED[2], GREEN[2], and BLUE[2] refer
to the color components of pixel value 2.
In addition, it is assumed that there is no external RAMDAC since only the LCD is being
programmed. Consequently, the RAMDAC registers are not programmed.
For code examples, see Section 9, “Sample Code” on page 54.
Table 2-1: Initializing the S1D13504 Registers
Operation
Description
REG[1Bh] = 0x00
Enable Host Interface
REG[23h] = 0x80
Disable the Display FIFO
REG[01h] = 0x30
Set Memory Type
REG[22h] = 0x24
Set Performance Register
REG[02h] = 0x26
Set Dual/Single Panel
REG[03h] = 0x00
MOD Rate
REG[04h] = 0x4F
Horizontal Display Width
REG[05h] = 0x1F
Horizontal Non-Display Period
REG[06h] = 0x00
HSYNC Start Position
REG[07h] = 0x00
HSYNC Pulse Width
REG[08h] = 0xEF
REG[09h] = 0x00
Vertical Display Height
REG[0Ah] = 0x01
Vertical Non-Display Period
REG[0Bh] = 0x00
VSYNC Start Position
REG[0Ch] = 0x00
VSYNC Pulse Width
REG[0Eh] = 0xFF
REG[0Fh] = 0x03
Screen 1 Line Compare
REG[10h] = 0x00
REG[11h] = 0x00
REG[12h] = 0x00
Screen 1 Display Start Address
REG[13h] = 0x00
REG[14h] = 0x00
REG[15h] = 0x00
Screen 2 Display Start Address
REG[16h] = 0xA0
REG[17h] = 0x00
Memory Address Offset
REG[18h] = 0x00
Pixel Panning
REG[19h] = 0x01
Clock Configuration
REG[1Ah] = 0x00
Power Save Configuration
REG[1Eh] = 0x00
REG[1Fh] = 0x00
General I/O Configuration