DM164 SITI [Silicon Touch Technology Inc.], DM164 Datasheet - Page 15

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

In order to catch correct open error signals. DCK must wait for at least 10 GCK latencies
after the LTH signal latches the input data. Figure 7 shows the timing chart.
IOUT Delay & EN_B Delay
The DM164 provides delay circuits between IOUTs. All IOUTs are divided into eight groups
and every three outputs of different colors form a group. For example, IOUT0 IOUT1 and
IOUT2 form the group1; IOUT3 IOUT4 and IOUT5 form the group2. The delay time
between every group is half GCK cycle time. Each IOUT delay in the same group is 5ns
(typical). Figure 8 shows the IOUT delay timing chart. Besides the iout delay, the EN_B is
also associated with GKC signal. When EN_B goes high and GCK keeps going, then each
group of IOUTs will turn off one by one depending on the GCK sequence. If EN_B goes
high but GCK stops going, then the IOUTs will not turn off normally.
(DOUTPH=H)
G r o u p 1
G r o u p 2
G r o u p 8
(DOUTPH=L)
(DCKPH=H)
(DCKPH=L)
MSEL
DOUT
DOUT
DCK
DCK
GCK
LTH
DIN
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
I O U T 2 1
I O U T 2 2
I O U T 2 3
I O U T 0
I O U T 1
I O U T 2
I O U T 3
I O U T 4
I O U T 5
G C K
L T H
GD[383]a
GND
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
1
1
GD[382]a
2
2
GD mode
1 G C K L a t e n c y
1
Figure 7. Open Error Signals Timing Chart
.
.
.
Figure 8. IOUT Delay Timing Chart
5 n s
5 n s
384
384
H a l f G C K
C y c l e
2
5 n s
5 n s
GD[383]a
GD[0]a
GD[383]a
10 GCK Latencies
3
ER[383]a
4
Version:A.002
ER[383]a
GD[383]b
ER[382]a
1
1
.
.
.
GD[382]b
ER[382]a
5
ER[381]a
2
2
5 n s
5 n s
ER[0]a
ER[0]a
6
DM164
384
384
Page 14
GD[0]b