DM164 SITI [Silicon Touch Technology Inc.], DM164 Datasheet - Page 12

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

or the falling edge of DCK by setting DCKPH to L or H. After all data are transferred into
the D&G mode shift registers, the D&G mode data can be latched from shift registers to
the data latches by a LTH signal at either D&G mode or GD mode. Figure 2 shows the
D&G mode data input timing chart.
GD Mode Data Format
At GD mode, the grayscale PWM data will be transferred to the shift registers. The
complete grayscale PWM data format consists of 24 x 16-bit. The total shift registers width
at GD mode is 384-bit. All grayscale PWM data is clocked in with MSB first. Figure 3
shows the GD mode data format.
When MSEL is set to low, the DM164 enters GD mode. The internal shift registers
changes to 384-bit wide. The input data can be transferred at either the rising edge of DCK
or the falling edge of DCK by setting DCKPH to L or H. After all data are transferred into
the GD mode shift registers, the GD mode data can be latched from shift registers to the
data latches by a LTH signal at GD mode only. Figure 4 shows the GD mode data input
timing chart.
IOUT
23-15
MSB
383
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
(DOUTPH=H)
(DOUTPH=L)
IOUT23
‧‧‧
DCKPH
DOUT
DOUT
MSEL
DCK
LTH
DIN
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
IOUT
23-0
368
GND
D&G[191]
Figure 2. D&G Mode Data Input Timing Chart
Figure 3. GD Mode Data Format (GD[383:0])
IOUT
22-15
367
1
D&G[190]
IOUT
22-14
2
366
D&G mode
D&G[189]
IOUT22 ~ IOUT01
3
‧‧‧
192
IOUT
D&G[0]
D&G[191]
01-1
17
D&G[191]
Version:A.002
IOUT
01-0
16
GD[383]
GD mode
IOUT
00-15
15
GD[382]
IOUT00
‧‧‧
DM164
Page 11
IOUT
LSB
00-0
0