ssd1908 Solomon Systech Limited:, ssd1908 Datasheet - Page 128

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

11.1.4 PWMCLK
PWMCLK is the internal clock used by the Pulse Width Modulator for output to the panel.
The source clock options for PWMCLK may be selected as in the following table.
For further information on controlling PWMCLK, see Section 7.2.10 “Pulse Width Modulation (PWM) Clock and
Contrast Voltage (CV) Pulse Configuration Registers”.
Note
The SSD1908 provides Pulse Width Modulation output on the pin LPWMOUT.
LPWMOUT can be used to control LCD panels which support PWM control of the back-light inverter.
11.2 Clocks versus Functions
Table 11-7 : SSD1908 Internal Clock Requirements, lists the internal clocks required for the following SSD1908
functions.
Solomon Systech
Function
Register Read/Write
Memory Read/Write
Look-Up Table Register
Read/Write
Software Power Saving
LCD Output
PWM / CV Output
Source Clock Options
Table 11-7 : SSD1908 Internal Clock Requirements
AUXCLK
Bus Clock
(BCLK)
Required
Required
Required
Required
Required
Required
CLKI
Table 11-6 :
PWMCLK Clock Selection
PWMCLK Selection REG[B1h] bit 0
Memory Clock
(MCLK)
Not Required
Required
Not Required
Not Required
Required
Required
Oct 2003
0
1
P 118/118 Rev 1.0
Pixel Clock
(PCLK)
Not Required
Not Required
Not Required
Not Required
Required
Required
PWM Clock
(PWMCLK)
Not Required
Not Required
Not Required
Not Required
Not Required
Required
SSD1908