TLC5916_10 Datasheet, PDF (5/30 Pages) Texas Instruments – 8-BIT CONSTANT-CURRENT LED SINK DRIVERS

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TLC5916, TLC5917
8-BIT CONSTANT-CURRENT LED SINK DRIVERS
SLVS695A – JUNE 2007 – REVISED MARCH 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 8-bit configuration latch (see Figure 3).
0
1
2
3
CLK
6
7
OE(ED2) ¹
LE(ED1) 0
SDI
8-bit Configuration Code
Figure 3. Writing Configuration Code
When the TLC5916/TLC5917 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 TLC5916/TLC5917 resume the Normal Mode. Switching to
Normal Mode resets all internal Error Status registers. OE(ED2) always enables the output port, whether the
TLC5916/TLC5917 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 © 2007–2008, Texas Instruments Incorporated
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