ssd1908 Solomon Systech Limited:, ssd1908 Datasheet - Page 139

• Manufacturer Part Number: ssd1908
• Description: Lcd Drivers,lcd Controllers
• Manufacturer: Solomon Systech Limited:

17.1.1 16 Bpp Color Depth
17.1.2 1/2/4/8 Bpp Color Depth
SSD1908
System
Memory
Address
* High byte lane (D[15:8]) data (e.g. 11) is associated with even address.
* Low byte lane (D[7:0]) data (e.g. 22) is associated with odd address.
For 16 bpp color depth, the Display Data Byte Swap bit (REG[71h] bit 6) must be set to 1
For 16 bpp color depth, the MSB of the 16-bit pixel data is stored at the even system memory address
location and the LSB of the 16-bit pixel data is stored at the odd system memory address location. Bus
data byte swapping (automatic when the SSD1908 is configured for Big-Endian) causes the 16-bit pixel
data to be stored byte-swapped in the SSD1908 display buffer. During display refresh this stored data
must be byte-swapped again before it is sent to the display.
For 1/2/4/8 bpp color depth, byte swapping must be performed on the bus data but not the display data.
For 1/2/4/8 bpp color depth, the Display Data Byte Swap bit (REG[71h] bit 6) must be set to 0.
15
0
11
Rev 1.0
22
0
System
Memory
(Big-Endian)
P 129/129
D[15:8]
D[7:0]
Figure 17-2 :
Oct 2003
CPU Data
Byte Swap
Display
Buffer
(Little-Endian)
Byte-swapping for 1/2/4/8 Bpp
15
22
11
0
0
11
Display
Buffer
Address
22
Solomon Systech