DM164 SITI [Silicon Touch Technology Inc.], DM164 Datasheet - Page 23

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

c.2 IWAVE=”L” and 11~15-bit PWM application
When the DM164 operates at n-bit PWM grayscale application and IWAVE is set to ”L”
(where n is between 11~15). 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 LSB of 16-bit GD mode data of each channel must be filled with all “0” ( k=16-n &
k < 6).
For example:
When the DM164 operates at 14-bit PWM grayscale application and IWAVE=”L”, the 2-bit
LSB of the 16-bit GD mode data must be filled with “0”. The 16-bit data format is showed
below:
(DCKPH=L)
(DCKPH=H)
MSEL
GCK
DCK
DCK
LTH
DIN
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
192
192
mode
Figure 14. Operating at n-bit PWM Grayscale Application Timing Diagram
D&G
D&G[0]
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PWM
[n-1]
Data
MSB
GD[383]a
PWM
Data
MSB
[13]
1
1
MSB-1
PWM
[n-2]
Data
GD[382]a
MSB-1
PWM
Data
[12]
2
2
n-bit PWM Data
GD mode
14-bit PWM Data
. . .
‧‧‧
n-bit
14-bit
‧‧‧
384
384
16-bit
16-bit
LSB+1
PWM
Data
[1]
LSB+1
GD[0]a
PWM
Data
[1]
10 GCK Latencies
PWM
Data
LSB
[0]
PWM
Data
LSB
[0]
2 GCK cycles
Version:A.002
k-bit Dummy Data
0
n
Dummy Data
GD[383]b
0
‧‧‧
k-bit
2-bit
2-bit
1
1
GD[382]b
0
2
2
0
. . .
DM164
Page 22
384
384
GD[0]b