DM164 SITI [Silicon Touch Technology Inc.], DM164 Datasheet - Page 22

• Manufacturer Part Number: DM164
• Description: 8x3-CHANNEL CONSTANT CURRENT LED DRIVER
• Manufacturer: SITI [Silicon Touch Technology Inc.]

c) Less Than 16-bit PWM Grayscale Application
c.1 IWAVE=”H” and less than 16-bit PWM application
When the DM164 operates at n-bit PWM grayscale application and IWAVE is set to ”H”
(where n is less than 16). Users must add k-bit dummy data into the 16-bit GD mode data
of each channel (where k = 16-n). The 16-bit GD mode data format of each channel is
showed below:
The k-bit MSB of 16-bit GD mode data of each channel must be filled with all “0” ( k=16-n ).
For example:
When the DM164 operates at 14-bit PWM grayscale application and IWAVE=”H”, the 2-bit
MSB of the 16-bit GD mode data must be filled with “0”. The 16-bit data format is showed
below:
Figure 14 shows the timing diagram when the DM164 operates at n-bit PWM grayscale
application. The frame cycle of n-bit PWM grayscale application can be controlled by GCK
and LTH signals.
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
k-bit Dummy Data
0
Dummy Data
0
‧‧‧
k-bit
2-bit
2-bit
0
0
PWM
Data
MSB
[13]
PWM
[n-1]
Data
MSB
MSB-1
PWM
Data
[12]
16-bit
16-bit
MSB-1
PWM
[n-2]
Data
14-bit PWM Data
n-bit PWM Data
14-bit
‧‧‧
‧‧‧
n-bit
Version:A.002
LSB+1
PWM
Data
[1]
LSB+1
PWM
Data
[1]
PWM
Data
LSB
[0]
PWM
Data
LSB
[0]
DM164
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