ssd1908 Solomon Systech Limited:, ssd1908 Datasheet - Page 127

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

Note
There are some restriction on the PCLK configuration for Analog TFT. SSD1908 can be operated under the
conditions in the Table 11-4 : PCLK condition for Analog TFT. Other than those conditions, the LCD interface of
SSD1908 may not be operated.
x = don’t care
There is a relationship between the frequency of MCLK and PCLK that must be maintained, see Table 11-5 :
Relationship between MCLK and PCLK.
PCLK source
SSD1908
AUXCLK
MCLK
MCLK
MCLK
MCLK
MCLK
MCLK
MCLK
BCLK
BCLK
BCLK
CLKI
BCLK selection
Rev 1.0
CLKI
CLKI
CLKI
CLKI
CLKI
CLKI
CLKI
CLKI
CLKI
CLKI
x
x
Source Clock Options
÷ 2
÷ 2
÷ 4
÷ 4
÷ 4
÷ 2
÷ 4
P 117/117
Table 11-5 : Relationship between MCLK and PCLK
AUXCLK ÷ 2
AUXCLK ÷ 3
AUXCLK ÷ 4
AUXCLK ÷ 8
Color Depth (bpp)
MCLK ÷ 2
MCLK ÷ 3
MCLK ÷ 4
MCLK ÷ 8
BCLK ÷ 2
BCLK ÷ 3
BCLK ÷ 4
BCLK ÷ 8
CLKI ÷ 2
CLKI ÷ 3
CLKI ÷ 4
CLKI ÷ 8
AUXCLK
MCLK
BCLK
CLKI
Table 11-4 : PCLK condition for Analog TFT
BCLK
BCLK
Oct 2003
16
8
4
2
1
MCLK selection
Table 11-3 : PCLK Clock Selection
BCLK
BCLK
BCLK
÷ 2 or
BCLK
or
BCLK
x
x
x
x
x
BCLK
BCLK
÷ 4
÷ 2
÷ 4
÷ 2
÷ 4
PCLK Selection (REG[05h])
MCLK to PCLK Relationship
f
f
f
f
f
MCLK
MCLK
MCLK
MCLK
MCLK
BCLK or BCLK
AUXCLK
MCLK or MCLK ÷ 2 or MCLK ÷ 4 or MCLK ÷ 8
MCLK or MCLK ÷ 2 or MCLK ÷ 4 or MCLK ÷ 8
≥ f
≥ f
≥ f
≥ f
≥ f
PCLK
PCLK
PCLK
PCLK
PCLK
BCLK
MCLK ÷ 2 or MCLK ÷ 4 or MCLK ÷ 8
MCLK ÷ 2 or MCLK ÷ 4 or MCLK ÷ 8
CLKI
BCLK
00h
10h
20h
30h
40h
01h
11h
21h
31h
41h
02h
12h
22h
32h
42h
03h
13h
23h
33h
43h
MCLK or MCLK ÷ 2 or MCLK ÷ 8
MCLK or MCLK ÷ 2 or MCLK ÷ 4
MCLK or MCLK ÷ 2 or MCLK ÷ 8
x 2
÷ 2
÷ 4
÷ 8
÷ 2 or
÷ 2 or
÷ 2 or
or
PCLK condition
÷ 2 or
BCLK
AUXCLK
BCLK
CLKI
BCLK
÷ 2 or
÷ 4 or
÷ 4 or
÷ 4 or
÷ 4 or
Solomon Systech
BCLK
CLKI
BCLK
AUXCLK
BCLK
÷ 4
÷ 8
÷ 8
÷ 8
÷ 8