TLC5926 Datasheet, PDF (4/29 Pages) Texas Instruments – 16-CHANNEL CONSTANT-CURRENT LED SINK DRIVERS

TLC5926, TLC5927
SLVS677 – JULY 2008 ....................................................................................................................................................................................................... www.ti.com
Timing Diagrams
CLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
OE(ED2) 1
LE(ED1) ₀
SDI
off
OUT0
on
off
OUT1
on
off
OUT2
on
off
OUT3
on
off
OUT15
on
SDO
Don't care
Figure 1. Normal Mode
Truth Table in Normal Mode
CLK
↑
↑
↑
↓
↓
LE(ED1)
H
L
H
X
X
OE(ED2)
L
L
L
L
H
SDI
Dn
Dn + 1
Dn + 2
Dn + 3
Dn + 3
OUT0...OUT15
Dn...Dn – 7...Dn – 15
No change
Dn + 2...Dn – 5...Dn – 13
Dn + 2...Dn – 5...Dn – 13
off
SDO
Dn – 15
Dn – 14
Dn – 13
Dn – 13
Dn – 13
The signal sequence shown in Figure 2 makes the TLC5926/TLC5927 enter Current Adjust and Error Detection
mode.
1
2
3
4
5
CLK
OE(ED2) ¹
0
1
1
1
LE(ED1) ⁰
0
0
1
0
Figure 2. Switching to Special Mode
4
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