TLC5926 Datasheet, PDF (5/29 Pages) Texas Instruments – 16-CHANNEL CONSTANT-CURRENT LED SINK DRIVERS

TLC5926, TLC5927
www.ti.com ....................................................................................................................................................................................................... SLVS677 – JULY 2008
In the Current Adjust mode, sending the positive pulse of LE(ED1), the content of the shift register (a current
adjust code) is written to the 16-bit configuration latch (see Figure 3).
0
1
2
3
4
CLK
12 13 14 15
OE(ED2) ¹
LE(ED1) 0
SDI
16-bit configuration code
Figure 3. Writing Configuration Code
When the TLC5926/TLC5927 is in the error detection mode, the signal sequence shown in Figure 4 enables a
system controller to read error status codes through SDO.
CLK
1
2
3
OE(ED2) 1
>2 µs
LE(ED1) 0
SDO
Error status code
Figure 4. Reading Error Status Code
The signal sequence shown in Figure 5 makes TLC5926/TLC5927 resume the Normal mode. Switching to
Normal mode resets all internal Error Status registers. OE (ED2) always enables the output port, whether the
TLC5926/TLC5927 enters current adjust mode or not.
1
2
3
4
5
CLK
OE(ED2) 1
0
1
1
1
LE(ED1) ⁰
0
0
0
0
Figure 5. Switching to Normal Mode
Copyright © 2008, Texas Instruments Incorporated
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Product Folder Link(s): TLC5926 TLC5927